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Transaction, Gross Ceded Credit Risk, Reinsurer [Domain] Reinsurer, Name [Domain] Assumed Assumed Premiums Earned Consideration transferred for renewal rights Asset Acquisition, Consideration Transferred Investment Income [Table] Investment Income [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Prior-service credit Accumulated Defined Benefit Plans Adjustment, Net Prior Service Including Portion Attributable to Noncontrolling Interest [Member] Authorized repurchase amount Share Repurchase Program, Authorized, Amount Write-offs charged against the allowance for credit losses and disputes Reinsurance, Loss on Uncollectible Accounts in Period, Amount Disposal Group Name [Axis] Disposal Group Name [Axis] Schedule of Other Comprehensive Income (Loss) Reclassification Adjustments Schedule Of Other Comprehensive Income Loss Reclassification Adjustments [Table Text Block] Schedule Of Other Comprehensive Income Loss Reclassification Adjustments Change in the discount rates used to measure traditional and limited payment long-duration insurance contracts AOCI, Market Risk Benefit, Change In Discount Rates, Noncontrolling Interest [Member] AOCI, Market Risk Benefit, Change In Discount Rates, Noncontrolling Interest Other liabilities Other liabilities Other Liabilities, Fair Value Disclosure Level 1 Fair Value, Inputs, Level 1 [Member] Foreign exchange and other Goodwill, Foreign Currency Translation Gain (Loss) And Other Increase (Decrease) Goodwill, Foreign Currency Translation Gain (Loss) And Other Increase (Decrease) Corebridge deconsolidation Corebridge deconsolidation, net of tax OCI, Equity Method Investment, after Tax Fortitude Re funds withheld assets Modified Coinsurance And Funds Withheld Assets [Member] Modified Coinsurance And Funds Withheld Assets [Member] Net income (loss) attributable to AIG common shareholders (in dollars per share) Earnings Per Share, Diluted Percentage of performance period depending on which actual number of awards can be earned Share Based Compensation Arrangement By Share Based Payment Award Number Of Awards Earned As Percentage Of Performance Target Share Based Compensation Arrangement By Share Based Payment Award Number Of Awards Earned As Percentage Of Performance Target Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Fortitude Re Funds Withheld Assets Fortitude [Member] Fortitude [Member] Domestic Domestic [Member] Domestic Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Treasury stock, shares of common stock (in shares) Treasury stock, beginning of year (in shares) Treasury stock, end of period (in shares) Treasury Stock, Common, Shares U.S. state & local Income Tax Paid, State and Local, after Refund Received Derivative Liability, Statement of Financial Position [Extensible Enumeration] Derivative Liability, Statement of Financial Position [Extensible Enumeration] Investments, Debt and Equity Securities [Abstract] AIG Incentive Saving Plan AIG Incentive Saving Plan [Member] AIG Incentive Saving Plan Convex Group Limited Convex Group Limited [Member] Convex Group Limited Yield Measurement Input, Yield [Member] Measurement Input Yield [Member] Actuarial gain (loss) Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Domestic Tax Jurisdiction Domestic Tax Jurisdiction [Member] Reduction in number of shares available for grants (in shares) Reduction In Shares Available For Future Grants Due To Awards Granted Under Incentive Plan Reduction In Shares Available For Future Grants Due To Awards Granted Under Incentive Plan Other Stockholders' Equity, Other Components of net realized capital gains (losses) Gain (Loss) on Securities [Line Items] Long Term Incentive Plan 2022 Long Term Incentive Plan 2022 [Member] Long Term Incentive Plan 2022 Less: Present value adjustment Lessee, Operating Lease, Liability, Undiscounted Excess Amount Net increase (decrease) due to divestitures and acquisitions Noncontrolling Interest, Increase From Business Combination And (Decrease) From Deconsolidation, Net Noncontrolling Interest, Increase From Business Combination And (Decrease) From Deconsolidation, Net Nontaxable or nondeductible items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent U.S. and international high yield US and Foreign High Yield Debt Securities [Member] US and Foreign High Yield Debt Securities Projected benefit obligation Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation Current accident year Increase (Decrease) In Loss Reserve Discount, Current Year Represents the increase (decrease) in discount of loss reserves attributable to current accident year loss reserve activities. Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Defined benefit plan maximum period for calculating unreduced benefits Defined Benefit Plan Maximum Period for Calculating Unreduced Benefits Defined Benefit Plan Maximum Period for Calculating Unreduced Benefits Due after five years through ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Total mortgage and other loans receivable Total Total Loans, carrying value Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 2024 Short-Duration Insurance Contract, Accident Year 2024 [Member] Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Basis differences on investments Deferred Tax Asset, Debt Securities, Trading, Unrealized Loss 2026 Long-Term Debt, Maturities, Repayments of Principal in Next Rolling 12 Months Ownership, number of shares held (in shares) Investment Owned, Balance, Shares Schedule of Fair Value and Gross Unrealized Loss on Available for Sale Securities Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Expiration Date Trading Arrangement Expiration Date Stock options, weighted average grant-date fair value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Recourse Status [Axis] Recourse Status [Axis] Unfavorable (favorable) prior year development, net of external reinsurance, before ADC cessions Prior Year Development Net of External Reinsurance Before ADC Cessions Supplemental Information For Property Casualty Insurance Underwriters, Prior Year Claims And Claims Adjustment Expense, Gross Supplemental Information For Property Casualty Insurance Underwriters, Prior Year Claims And Claims Adjustment Expense, Gross Schedule of Net Realized and Unrealized Gains and Losses Included in Income, Level 3 Assets Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table Text Block] Unrealized gains recognized during the reporting period on equity securities and other investments still held at the reporting date Equity Securities, FV-NI, Unrealized Gain (Loss) Non-U.S. governments Non-U.S. governments Debt Security, Government, Non-US [Member] Retained investment in Corebridge Other investments Other Investments [Member] Real Estate and Other Fixed Assets, Net of Accumulated Depreciation Property, Plant and Equipment, Net Financial Information Related to Corebridge as an Equity Method Investee Equity Method Investments [Table Text Block] Investments Investments [Member] SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract] Restructuring and other costs Restructuring Charges Geographic Concentration Risk Geographic Concentration Risk [Member] Prior years, discount charge (benefit) Prior Year Claims And Claims Adjustment Expense, Discount Represents the amount of discount accreted to the prior years' liability for unpaid claims and claims adjustment expense. Life policy reserves Deferred Tax Liabilities, Deferred Expense, Reserves and Accruals, Policyholder Liabilities Deferred Tax Liabilities, Deferred Expense, Reserves and Accruals, Policyholder Liabilities U.S. federal income tax at statutory rate, tax expense (benefit) Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Equity Method Investments Including Corebridge Financial Equity Method Investments Including Corebridge Financial Inc [Member] Equity Method Investments Including Corebridge Financial Inc Current and deferred income tax liabilities Income Taxes Payable, Current And Deferred Income Tax Liabilities, Net Income Taxes Payable, Current And Deferred Income Tax Liabilities, Net Foreign Currency Translation Adjustments Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member] Noncash revenues, expenses, gains and losses included in income (loss): Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Benefits, losses and expenses: Benefits, Losses and Expenses [Abstract] Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] Gross Unrealized Losses, 12 Months or More Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Hedge funds Hedge Funds [Member] State and local income tax, net of federal income tax effect Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Derivative liabilities, net Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Issuance of long-term debt Proceeds from Issuance of Long-Term Debt Expected term Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Net Investment Income - Fortitude Re Funds Withheld Assets Net Investment Income - Fortitude Re Funds Withheld Assets [Member] Net Investment Income - Fortitude Re Funds Withheld Assets Gross Unrealized Losses, Less than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Number of shares reserved for future grants (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Prior years Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Federal Home Loan Bank stock Federal Home Loan Bank Stock Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Less: Net income attributable to noncontrolling interests Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest Interest rate contracts Interest Rate Contract [Member] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Number of shares excluded from diluted shares outstanding because the effect would have been anti-dilutive (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Liabilities: Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Net impact from elimination of international reporting lag, reconciliation to income (loss) from continuing operations before income tax expense Net Impact From Elimination Of International Reporting Lag, Adjusted Pre-Tax Income (Loss) Net Impact From Elimination Of International Reporting Lag, Adjusted Pre-Tax Income (Loss) 2025 Short-Duration Insurance Contract, Accident Year 2025 [Member] Dividends available to be paid from insurance subsidiaries without prior approval Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval Year 4 (as a percent) Short-Duration Insurance Contracts, Historical Claims Duration, Year Four Other Commitments [Table] Other Commitments [Table] Measure: Measure [Axis] Non- Structured Non Structured Investment [Member] Non Structured Investment Workers compensation tabular discount amount Workers Compensation Discount, Amount, Tabular Current year monetary amount of the change in worker's compensation tabular reserve liability resulting from the discount applied to reduce the reserve to present value. Unfavorable (favorable) prior year loss reserve development Prior years, excluding discount and amortization of deferred gain Prior Year Claims And Claims Adjustment Expense Excluding Discount And Deferred Gain Amortization Represents the increase decrease in the liability for unpaid claims and claims adjustment expense related to the period for claims incurred in prior reporting periods and related claims settlement costs, excluding discount and amortization of deferred gain. Reinsurance recoverable (as a percent) Reinsurance Recoverables, Gross, Percent Reinsurance Recoverables, Gross, Percent Disposal Group Classification [Domain] Disposal Group Classification [Domain] Net Investment Income Investment Income [Member] Schedule of Effect of the Reclassification of Significant Items out of Accumulated Other Comprehensive Income on the Respective Line Items in the Consolidated Statements of Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Due after ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Percent Mortgage-backed, asset-backed and collateralized Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Outstanding, beginning of year (in dollars per share) Outstanding, end of year (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Common stock, shares issued (in shares) Shares issued, beginning of year (in shares) Shares issued, end of period (in shares) Common Stock, Shares, Issued Change in allowance for credit losses on fixed maturity securities Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Period Increase (Decrease) Derivative Asset, Statement of Financial Position [Extensible Enumeration] Derivative Asset, Statement of Financial Position [Extensible Enumeration] Leases, weighted average lease term Operating Lease, Weighted Average Remaining Lease Term Derivatives Not Designated as Hedging Instruments Derivatives Not Designated as Hedging Instruments [Table Text Block] Additional employer matching contribution, actual matching percentage of participant's contribution (as a percent) Defined Contribution Plan, Employer Matching Contribution, Additional Contribution, Percent of Employees' Gross Pay Defined Contribution Plan, Employer Matching Contribution, Additional Contribution, Percent of Employees' Gross Pay Securities sold during the period Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Sold U.S. workers' compensation Workers Compensation Discount, Value Amount Workers Compensation Discount, Value Amount Total Shareholder Return Amount Total Shareholder Return Amount Security Exchange Name Security Exchange Name Foreign Income Tax Paid, Foreign, after Refund Received PBO Exceeds Fair Value of Plan Assets Defined Benefit Plan, Pension Plan with Project Benefit Obligation in Excess of Plan Assets [Abstract] Effect of cross-border tax laws, net of related tax credits: Effective Income Tax Rate Reconciliation, Cross-Border Tax Effect, Percent [Abstract] Workers compensation non tabular discount amount Workers Compensation Discount, Amount, Nontabular Current year monetary amount of the change in worker's compensation non tabular reserve liability resulting from the discount applied to reduce the reserve to present value. Premiums Disposal Group, Including Discontinued Operation, Premiums Disposal Group, Including Discontinued Operation, Premiums Lending Activities Financing Receivables [Text Block] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Ceded Ceded Premiums Earned Ceded Premiums Earned Venture capital Venture Capital Funds [Member] 2022 Short-Duration Insurance Contract, Accident Year 2022 [Member] Asset Class [Domain] Asset Class [Domain] Net Realized and Unrealized Gains (Losses) Included in Income Net realized gains (losses), assets Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Statement [Line Items] Statement [Line Items] Fixed maturity securities: Debt Securities [Abstract] Businesses in run-off Business Run-Off [Member] Business Run-Off Common Stock Common Stock, Par Value $2.50 Per Share Common Stock [Member] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Issuances, liabilities Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Unrealized (gains) losses in earnings - net Change in unrealized appreciation on available for sale securities Unrealized Gain (Loss) on Investments Premiums Revenue Recognition, Premiums Earned, Policy [Policy Text Block] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] Prior Year Development Net of External Reinsurance After ADC Cessions Prior Year Claims and Claims Adjustment Expense Foreign Plan Foreign Plan [Member] Other Other Hedge Funds [Member] Represents the other hedge funds category of investment which includes multi strategy and relative value strategies. Preferred stock redemption, depository shares equity interest in preferred stock (as a percent) Stock Redeemed Or Called During The Period, Equivalent Ratio Stock Redeemed Or Called During The Period, Equivalent Ratio Debt Debt, Policy [Policy Text Block] Equity method income related to Corebridge (based on fair value) Equity in undistributed net income (loss) of consolidated subsidiaries Income (Loss) from Equity Method Investments Unearned premiums Unearned premiums Unearned Premiums Basic: Basic: Earnings Per Share, Basic [Abstract] Change in unrealized appreciation of all other investments OCI, Debt Securities, Available-For-Sale, Without Allowance For Credit Loss, Unrealized Holding Gain (Loss), After Adjustment, after Tax Gross appreciation or the gross loss in value of the total of unsold fixed maturity investments other than investments which had been determined to have had an other than temporary credit impairment in fair value below its amortized cost basis at the end of an accounting period due to credit impairment, net of reclassification adjustments and taxes. Net loss reserve discount charge Net reserve discount benefit (charge) Increase (Decrease) In Loss Reserve Discount Represents the increase (decrease) in discount of loss reserves. Operating Activities [Axis] Operating Activities [Axis] Singapore SINGAPORE Growth equity Growth Equity [Member] Investments in equity securities of mature companies that are aiming for growth. Total of IBNR Liabilities Plus Expected Development on Reported Losses Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Liabilities: Liabilities, Fair Value Disclosure [Abstract] Reinsurance Recoverable, Allowance for Credit Loss [Roll Forward] Reinsurance Recoverable, Allowance for Credit Loss [Roll Forward] Actuarial losses Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] Collateral obtained from third parties for derivative transactions Additional Collateral, Aggregate Fair Value Tabular discount rate (as a percent) Workers Compensation Discount, Percent, Tabular For tabular calculations of the workers compensation reserve, the percent discount applied to worker's compensation reserve liability to reduce the reserve to present value. Total deferred tax assets Deferred Tax Assets, Gross Other comprehensive income Other comprehensive income Other comprehensive income (loss) related to continued operations Other Comprehensive Income (Loss), Net of Tax Purchases, Sales, Issuances and Settlements, Net Purchases, Sales, Issuances and Settlements, Net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) Schedule of Segment Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Net change in total reserve discount Increase (Decrease) In Loss Reserve Discount, Including Reinsurance Represents the net change in discount of loss reserves. Maximum exposure to loss, Off-Balance Sheet Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Asset Measurement Input Type [Domain] Measurement Input Type [Domain] Summary of Assets Supporting Funds Withheld Arrangements Summary Of Assets Supporting Funds Withheld Arrangements [Table Text Block] Summary Of Assets Supporting Funds Withheld Arrangements Ceded reserves Liability for Future Policy Benefits, Losses, Claims and Loss Expense Reserves Ceded Liability for Future Policy Benefits, Losses, Claims and Loss Expense Reserves Ceded Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Consolidated VIE Variable Interest Entity, Primary Beneficiary [Member] Share-based compensation expense - pre-tax Share-based compensation expense - pre-tax, recognized Share-Based Payment Arrangement, Expense Rollforward of the Changes in Allowance for Credit Losses on Available for Sale Fixed Maturity Securities Debt Securities, Available-for-Sale, Allowance for Credit Loss [Table Text Block] 2020 Short-Duration Insurance Contract, Accident Year 2020 [Member] General operating and other expenses Disposal Group, Including Discontinued Operation, Operating And Other Expense Disposal Group, Including Discontinued Operation, Operating And Other Expense Fixed maturity securities and other invested assets received in connection with reinsurance transactions Noncash Or Part Noncash Acquisition, Investments Acquired During Reinsurance Transaction Noncash Or Part Noncash Acquisition, Investments Acquired During Reinsurance Transaction Total liabilities and equity Liabilities and Equity Retirement Plan Liabilities Adjustment Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Cash and restricted cash at beginning of year Cash and restricted cash at end of year Total cash and restricted cash shown in Statements of Cash Flows – Parent Company Only Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Reclassification of significant items out of Accumulated Other Comprehensive Income Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Liabilities Liability, Defined Benefit Plan Share-based compensation expense - after-tax Share-Based Payment Arrangement, Expense, after Tax Accounting Policies [Abstract] Nontabular discount rate (as a percent) Workers Compensation Discount, Percent, Nontabular For non tabular calculations of the workers compensation reserve, the percent discount applied to worker's compensation reserve liability to reduce the reserve to present value. Total Operating Segments and Corporate Non Segment [Member] Represents the sum of total operating segments and consolidation and elmination. Income from continuing operations Income (loss) from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest 2025 Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Pay vs Performance Disclosure [Line Items] Preferred stock liquidation preference (in dollars per share) Preferred Stock, Liquidation Preference Per Share Revenues: Disposal Group, Including Discontinued Operation, Revenue [Abstract] Disposal Group, Including Discontinued Operation, Revenue Performance period Share Based Compensation Arrangement By Share Based Payment Award Performance Period Share Based Compensation Arrangement By Share Based Payment Award Performance Period Deferred policy acquisition costs Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Net Transfers into Level 3 at end of reporting period, net gains (losses) not included in realized and unrealized gains and losses related to Level 3 for the period Fair Value, Level 3 Transfers In At End Of Period, Net Gain (Loss) Excluded From Level 3 Gains (Losses) Net gains or losses for the period (realized and unrealized) related to assets and liabilities transferred into Level 3 at fair value at the end of the reporting period and are therefore not reflected in realized and unrealized gains and losses related to Level 3 for the period. Deposit accounting assets, allowance for credit loss Deposit Contracts Assets, Allowance For Credit Loss Deposit Contracts Assets, Allowance For Credit Loss Increase (decrease) due to: Goodwill Period Increase (Decrease) [Abstract] Goodwill Period Increase (Decrease) Assets: Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Variable Interest Entity [Table] Variable Interest Entity [Table] Year 8 (as a percent) Short-Duration Insurance Contracts, Historical Claims Duration, Year Eight 2023 Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year AIG contributions Defined Benefit Plan, Plan Assets, Contributions by Employer 2028 Lessee, Operating Lease, Liability, to be Paid, Year Three Change in net unrealized gains (losses), net of tax Debt Securities Available For Sale, Unrealized Gain Loss, Net Of Tax Debt Securities Available For Sale, Unrealized Gain Loss, Net Of Tax Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Comprehensive income attributable to AIG Comprehensive Income (Loss), Net of Tax, Attributable to Parent Name Measure Name Schedule of Income (Loss) from Continuing Operations Before Income Tax Expense (Benefit) by U.S. and Foreign Location Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Issuances, assets Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Secured Debt Secured Debt [Member] Schedule of Liabilities Measured on a Recurring Basis Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Sales Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table] Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table] Class of Stock [Line Items] Class of Stock [Line Items] Equity Securities And Mutual Funds Equity Securities And Mutual Funds [Member] Equity Securities And Mutual Funds Expected return on assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets Available increase in commitment Line of Credit Facility, Accordion Feature, Increase Limit Line of Credit Facility, Accordion Feature, Increase Limit Net income (loss) from discontinued operations attributable to AIG Income (loss) from discontinued operations Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Unsecured Debt Unsecured Debt [Member] Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments [Table Text Block] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] Other Investment Companies Other Investment Companies [Member] Other Comprehensive (Income) Loss Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) Long-term debt Total Long-Term Debt Total assets Total assets Maximum exposure to loss, On-Balance Sheet Assets Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Geographical [Domain] Geographical [Domain] Net results of businesses in run-off, net investment income Income (Loss) From Businesses In Run-Off, Net Investment Income Income (Loss) From Businesses In Run-Off, Net Investment Income Tax Accounting Policies Income Tax, Policy [Policy Text Block] Schedule of Claim Payout Patterns Short-Duration Insurance Contracts, Schedule of Historical Claims Duration [Table Text Block] Unlimited Carryforward Period and Carryforward Periods Unlimited Carryforwards And Tax Years 2032 And After [Member] Unlimited Carryforwards And Tax Years 2032 And After Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Supplementary Disclosure of Condensed Consolidated Cash Flow Information Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Net impact from elimination of international reporting lag, net investment income Net Impact From Elimination Of International Reporting Lag, Net Investment Income Net Impact From Elimination Of International Reporting Lag, Net Investment Income Private equity funds Direct private equity Private Equity Funds [Member] Cash Equivalents, Restricted Cash and Restricted Cash Equivalents: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation [Abstract] Schedule of Weighted Average Assumptions Used to Determine the Benefit Obligations Defined Benefit Plan Weighted Average Assumptions Used In Calculating Benefit Obligation Table Text Block [Table Text Block] Defined Benefit Plan Weighted Average Assumptions Used In Calculating Benefit Obligation Table Text Block Long Term Incentive Plan 2024 Long Term Incentive Plan 2024 [Member] Long Term Incentive Plan 2024 Transfers out Level 3 at end of reporting period, net gains (losses) included in realized and unrealized gains and losses related to Level 3 for the period Fair Value, Level 3 Transfers Out At End Of Period, Net Gain (Loss) Included In Level 3 Gains (Losses) Net gains or losses for the period (realized and unrealized) related to assets and liabilities transferred out of Level 3 at fair value at the end of the reporting period and are therefore reflected in realized and unrealized gains and losses related to Level 3 for the period. Short Duration Insurance Contracts Last Ten Accident Years Short Duration Insurance Contracts Last Ten Accident Years [Member] Short Duration Insurance Contracts Last Ten Accident Years Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Liabilities for losses and loss adjustment expenses and prior year loss development, net of reinsurance Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net Shares of common stock included in pension plan assets (in shares) Shares Of Common Stock Included In Retirement Plan Assets Shares Of Common Stock Included In Retirement Plan Assets Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Premiums and other receivables, allowance for credit losses and disputes Allowance for Doubtful Accounts, Premiums and Other Receivables Retained investment in Corebridge using fair value option Corebridge book value Equity Method Investments Related Party Related Party [Member] Schedule of Income Tax Expense (Benefit) Attributable to Pre-Tax Income (Loss) from Continuing Operations Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Plan Name [Axis] Plan Name [Axis] Schedule of Supplemental Information for Loss and Benefit Reserves, Gross and Net of Ceded Reinsurance Summary Of The Composition Of Pool Of Assets [Table Text Block] Summary Of The Composition Of Pool Of Assets PEO PEO [Member] Effect of interest rate changes Increase (Decrease) In Loss Reserve Discount, Effect Of Interest Rate Changes Increase (Decrease) In Loss Reserve Discount, Effect Of Interest Rate Changes Gross Transfers In Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Investments Classified by Contractual Maturity Date Investments Classified by Contractual Maturity Date [Table Text Block] Reimbursable purchase price, maximum amount Asset Acquisition, Consideration Transferred, Reimbursable Purchase Price, Maximum Amount Asset Acquisition, Consideration Transferred, Reimbursable Purchase Price, Maximum Amount Non-cash investing activities: Noncash Investing and Financing Items [Abstract] Income Tax Paid, by Individual Jurisdiction [Line Items] Income Tax Paid, by Individual Jurisdiction [Line Items] 2029 Tax Year 2029 [Member] Tax Year 2029 Due in one year or less Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Junior subordinated debt Junior Subordinated Debt [Member] U.S. Plans United States UNITED STATES Reinsurance recoverables Reinsurance Recoverables, Gross Retained Earnings Retained Earnings [Member] Total cash and restricted cash shown in the Consolidated Statements of Cash Flows Cash and restricted cash at beginning of year Cash and restricted cash at end of 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gain. Additional paid-in capital Additional Paid in Capital, Common Stock Investment in consolidated subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Interest Interest Paid, Excluding Capitalized Interest, Operating Activity Right of use asset Operating Lease, Right-of-Use Asset Consolidated total amounts Effective Income Tax Rate Reconciliation, Percent Captive Insurers Captive Insurers [Member] Captive Insurers [Member] Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Plan Name [Domain] Plan Name [Domain] Liability for unpaid losses and loss adjustment expenses Liability for unpaid losses and loss adjustment expenses Liability for unpaid losses and loss adjustment expenses Excess tax benefit due to share settlements Share-Based Payment Arrangement, Excess Tax Expense (Benefit) Share-Based Payment Arrangement, Excess Tax Expense (Benefit) Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period AIG Shareholders’ equity: Equity [Abstract] Valuation allowance Valuation allowance Deferred Tax Assets, Valuation Allowance Loans on nonaccrual status Financing Receivable, Nonaccrual Building Building [Member] Current Current Federal Tax Expense (Benefit) Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Fair value and gross unrealized losses on AIG's available for sale securities Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] Gross Transfers In Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 Purchases Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Notes Due 2028 Notes Due 2028 [Member] Notes Due 2028 Weighted-average Weighted Average [Member] Restricted cash included in Short-term investments Restricted cash Restricted Cash and Cash Equivalent, Current General operating and other expenses General Operating Expense Selling, General and Administrative Expense Deferred income tax assets Deferred Income Tax Assets, Net Bonds available for sale, measurement input Debt Securities, Available-for-Sale, Measurement Input Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Income (loss) attributable to AIG common shareholders from continuing operations Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic Net gain on divestitures and other Disposal Group, Including Discontinued Operation, Gain (Loss) On Divestitures And Other, Net Disposal Group, Including Discontinued Operation, Gain (Loss) On Divestitures And Other, Net RMBS Residential Mortgage-Backed Securities [Member] Fixed Maturities And Equity Securities Fixed Maturities And Equity Securities [Member] Fixed Maturities And Equity Securities Fortitude Re funds withheld payable (portion measured at fair value: 2025 - $(92); 2024 - $(128)) Fortitude Re funds withheld payable, portion measured at fair value Fortitude Re funds withheld payable Fortitude Re funds withheld payable Funds Held under Reinsurance Agreements, Liability Direct Direct Premiums Written Effect of rate different than statutory Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Arrangement Duration Trading Arrangement Duration Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value of Fixed Maturity Securities Measured at Fair Value Based on Election of the Fair Value Option Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Net deferred tax assets before valuation allowance Net deferred tax assets before valuation allowance Deferred Tax Assets, Net before Valuation Allowance Deferred Tax Assets, Net before Valuation Allowance Purchases Defined Benefit Plan Plan Assets Level 3 Reconciliation Increase Decrease For Purchase Defined Benefit Plan Plan Assets Level 3 Reconciliation Increase Decrease For Purchase Share-Based Compensation Plans Share-Based Payment Arrangement [Text Block] Shares repurchased (in shares) Stock Repurchased and Retired During Period, Shares Credit Derivatives Contract Type [Domain] Credit Derivatives Contract Type [Domain] Assets: Assets [Abstract] Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Purchase of common stock Aggregate repurchases of common stock Treasury Stock, Value, Acquired, Cost Method Net realized gains (losses), reconciliation to income (loss) from continuing operations before income tax expense Realized Other Investment Gains (Losses) Realized Other Investment Gains (Losses) Capitalized Software Costs Capitalized Software Costs [Member] Capitalized Software Costs Foreign Currency Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member] Other Operating Expenses SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense Auditor Information [Abstract] Auditor Information Depreciation and other amortization Depreciation, Amortization and Accretion, Net Retirement Plan Name [Domain] Retirement Plan Name [Domain] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Foreign exchange effect Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) Discounting of Reserves [Line Items] Discounting of Reserves [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Unearned premium reserve reduction Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Unearned Premiums Reserve 2027 Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Two Additional collateral postings and termination payments Credit Derivative, Additional Collateral Termination Payments Credit Derivative, Additional Collateral Termination Payments Other State and Local Tax Jurisdiction, Other [Member] Other Changes SEC Schedule, 12-09, Valuation Allowances and Reserves, Increase (Decrease) Adjustment Total Assets, Fair Value Disclosure Net Loss Reserve Discount Benefit (Charge) [Line Items] Net Loss Reserve Discount Benefit (Charge) [Line Items] Net loss reserve discount benefit (charge) [Line Items] Schedule of Debt Schedule of Debt [Table Text Block] Rollforward of the Reinsurance Recoverable Allowance Reinsurance Recoverable, Allowance for Credit Loss [Table Text Block] Business in Run-Off Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Net cash provided by operating activities - continuing operations Cash Provided by (Used in) Operating Activity, Continuing Operation Net investment income Disposal Group, Including Discontinued Operation, Net Investment Income Disposal Group, Including Discontinued Operation, Net Investment Income Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Net cash provided by (used in) investing activities - continuing operations Cash Provided by (Used in) Investing Activity, Continuing Operation Income tax expense (benefit): Income tax expense (benefit): Income Tax Expense (Benefit), Continuing Operations [Abstract] Due after five years through ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Amortized Cost Net gain (loss) Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax 2028 Tax Year 2028 [Member] Tax Year 2028 Debt redeemed, including accrued and unpaid interest Debt Instrument, Repurchase Amount Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Total AIG U.S. consolidated federal income tax group tax losses and credits carryforwards on a U.S. GAAP basis Tax Effect On Operating Loss And Credit Carryforwards GAAP Basis Tax Effect On Operating Loss And Credit Carryforwards GAAP Basis Name Awards Close in Time to MNPI Disclosures, Individual Name Gains/(losses) recognized in earnings for excluded components Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net AIG Japan Holdings Kabushiki Kaisha Loans And Mortgages Payable [Member] Loans And Mortgages Payable Year 2 (as a percent) Short-Duration Insurance Contracts, Historical Claims Duration, Year Two Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Other commitments Other Commitment Retirement Plan Liabilities Adjustment Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest [Member] Less: Noncontrolling interests Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Discount ceded on sale (as a percent) Percent Of Discount Ceded Percent Of Discount Ceded Treasury stock Treasury Stock, Value Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Net Loss Reserve Discount Benefit (Charge) [Table] Net Loss Reserve Discount Benefit (Charge) [Table] Net Loss Reserve Discount Benefit (Charge) Premiums SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue AOCI Including Portion Attributable to Noncontrolling Interest AOCI Including Portion Attributable to Noncontrolling Interest [Member] Auditor Firm ID Auditor Firm ID Segments [Domain] Segments [Domain] Accumulated comprehensive loss recognized on deconsolidation Reclassification adjustment of Accumulated other comprehensive loss Discontinued Operation, Gain (Loss) On Disposal Of Discontinued Operation, Reclassifications, Net Of Tax Discontinued Operation, Gain (Loss) On Disposal Of Discontinued Operation, Reclassifications, Net Of Tax Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Notes Due 2025 Notes Due 2025 [Member] Notes Due 2025 Other changes Reinsurance Recoverables, Allowance, Other Increase (Decrease) Amount of allowance for credit loss on reinsurance recoverables classified as other. Statement of Financial Position Location, Balance [Domain] Statement of Financial Position Location, Balance [Domain] Unrealized Appreciation (Depreciation) of All Other Investments AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Discount and spread (as a percent) Workers Compensation Discount And Spread, Percent Workers Compensation Discount And Spread, Percent Year 7 (as a percent) Short-Duration Insurance Contracts, Historical Claims Duration, Year Seven Ownership, fair value (in dollars per share) Equity Method Investment, Quoted Market Value Per Share Equity Method Investment, Quoted Market Value Per Share Senior Notes Senior Notes Senior Notes [Member] Counterparty netting Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Obligations of states, municipalities and political subdivisions US States and Political Subdivisions Debt Securities [Member] 2024 Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Intercompany tax payable Accrued Intercompany Income Taxes Accrued Intercompany Income Taxes Financial Asset, Aging [Axis] Financial Asset, Aging [Axis] All Executive Categories All Executive Categories [Member] Schedule of Components of the Net Deferred Tax Asset Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Common stock Common Stock, Value, Issued Equity in income from equity method investments, net of dividends or distributions Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Operating Activities [Domain] Operating Activities [Domain] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Premiums and Other Receivables - Net of Allowance for Credit Losses and Disputes Premiums Receivable, Basis of Accounting, Policy [Policy Text Block] Fair Value Measured at Net Asset Value Per Share Fair Value Measured at Net Asset Value Per Share [Member] Comprehensive income Comprehensive loss Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Schedule of Summarized Financial Information of Equity Method Investees Equity Method Investments Summarized Financial Information [Table Text Block] Equity Method Investments Summarized Financial Information Summary of Outstanding Share-Settled LTI Awards Schedule of Nonvested Share Activity [Table Text Block] Schedule of Net Investment Income Investment Income [Table Text Block] Valuation Allowance [Line Items] Valuation Allowance [Line Items] Ownership (as a percent) Equity Method Investment, Ownership Percentage Short-term investments Short-Term Investments [Member] Numerator for EPS: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Mortgage and other loans receivable Payments to Acquire Mortgage Notes Receivable Hedging Designation [Axis] Hedging Designation [Axis] Scenario [Axis] Scenario [Axis] Sales Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Decrease for Sale Reconciliation of the Beginning and Ending Balances of the Total Amounts of Gross Unrecognized Tax Benefits Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Liability for Claims and Claims Adjustment Expense [Line Items] Liability for Claims and Claims Adjustment Expense [Line Items] Insurance Liabilities Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] Change in retirement plan liabilities adjustment Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Domestic Plan Domestic Plan [Member] Derivative Contract [Domain] Derivative Contract [Domain] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] 2030 Defined Benefit Plan, Expected Future Benefit Payment, Year Five Change in future policy benefits Other Comprehensive Income, Unrealized Gain (Loss) On Future Policy Benefit Reserves Net Of Offset In Deferred Acquisition Costs Represents the amount recorded in other comprehensive income due to the unrealized appreciation of investments of future policyholder benefit reserves, partially offset in deferred acquisition costs and related reduction in deferred acquisition costs. Gross Realized Losses Debt Securities, Available-for-Sale, Realized Loss Purchases of: Payment for Investing Activity [Abstract] Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward] Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward] Contractual term of the option Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Debt of consolidated investment entities Debt Of Consolidated Investments [Member] Debt Of Consolidated Investments Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Net cash used in operating activities - discontinued operations Cash Provided by (Used in) Operating Activity, Discontinued Operation Investment intent, amount Equity Method Investment, Investment Intent, Amount Equity Method Investment, Investment Intent, Amount Net change in short-term investments Increase (Decrease) In Short-term Investments, Net Increase (Decrease) In Short-term Investments, Net Less: Noncontrolling interests Equity Method Investments, Noncontrolling Interest Equity Method Investments, Noncontrolling Interest Covenant for AIG ownership percentage in Corebridge, minimum (as a percent) Equity Method Investment, Covenant, Ownership Percentage, Minimum Equity Method Investment, Covenant, Ownership Percentage, Minimum Other Debt Securities Available For Sale Allowance For Credit Loss Other Increase (Decrease) Debt Securities Available For Sale Allowance For Credit Loss Other. 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Non U.S.. Life Insurance Companies, Available-for-Sale Portfolio Non U.S.. Life Insurance Companies, Available-for-Sale Portfolio [Member] Non U.S.. Life Insurance Companies, Available-for-Sale Portfolio Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Award Timing Disclosures [Line Items] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Net Liability for unpaid loss and loss adjustment expenses, beginning of year Net liability for unpaid losses and loss adjustment expenses Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below Liability for Unpaid Claims and Claims Adjustment Expense, Net Unfunded Commitments Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments Net Realized Gains (Losses) Realized Investment Gains (Losses) [Member] Primary financial statement caption encompassing net realized gains and losses. Deferred Deferred State and Local Income Tax Expense (Benefit) Change in fair value of market risk benefits, net Market Risk Benefit, Change in Fair Value, Gain (Loss), Net Market Risk Benefit, Change in Fair Value, Gain (Loss), Net Reinsurance Reinsurance [Text Block] Net income (loss) attributable to AIG Income before income taxes Net income (loss) attributable to AIG Net Income (Loss) Attributable to Parent Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Operating Lease, Lease Income, Lease Payments Operating Lease, Lease Income, Lease Payments Reconciliation Between Actual Income Tax (Benefit) Expense and Statutory U.S. Federal Amount Computed by Applying the Federal Income Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Interest expense Disposal Group, Including Discontinued Operation, Interest Expense Future policy benefits Future policy benefits Liability for Future Policy Benefit, before Reinsurance Adoption Date Trading Arrangement Adoption Date Write-offs charged against the allowance Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Elimination and consolidations Reconciling Items Consolidation, Eliminations [Member] Accretion and other adjustments to prior year discount Increase (Decrease) In Loss Reserve Discount, Prior Year Represents the increase (decrease) in discount of loss reserves attributable to prior year year loss reserve development and payout pattern Unrealized Appreciation (Depreciation) of All Other Investments AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Including Noncontrolling Interest [Member] Retained earnings Retained Earnings (Accumulated Deficit) >90 days delinquent or in process of foreclosure Financial Asset, Greater Than 90 Days Past Due [Member] Financial Asset, Greater Than 90 Days Past Due Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Defined contribution plan, maximum annual contributions per employee, percent Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Fortitude RE Funds Withheld Assets Fortitude RE Funds Withheld Assets [Member] Fortitude RE Funds Withheld Assets Other Effective Income Tax Rate Reconciliation, Cross-Border, Other, Amount Accident and health Accident and Health Insurance Product Line [Member] Amortization of Deferred Gain at Inception Changes In Unpaid Net Loss Reserves Related To Deferred Gain, Amortization On Retroactive Reinsurance At Inception Changes In Unpaid Net Loss Reserves Related To Deferred Gain, Amortization On Retroactive Reinsurance At Inception Aggregate minimum required statutory capital and surplus Statutory Accounting Practices, Statutory Capital and Surplus Required Lapse in statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Greater than 1.2X Debt Service Coverage Ratio Range One [Member] Debt service coverage ratio which is greater than 1.2x International Commercial International Operating Segment [Member] Consists of legal entity General Insurance businesses for all other regions within General Insurance including The American International Oversees Association and all other countries including Puerto Rico. Schedule of Assets Measured on a Recurring Basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Share consideration received on transaction (in shares) Disposal Group, Including Discontinued Operation, Consideration Received, Shares Disposal Group, Including Discontinued Operation, Consideration Received, Shares Valuation allowance related to certain tax attribute carryforward Tax Credit Carryforward, Valuation Allowance Per share purchase price (in dollars per share) Sale of Stock, Price Per Share Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] Postretirement benefit plans Other Postretirement Benefits Plan [Member] Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales Liability for unpaid losses and loss adjustment expenses, including allowance for credit losses of $14 in 2025 and $14 in 2024 Liability for unpaid losses and loss adjustment expenses Liability for unpaid loss and loss adjustment expenses, beginning of year Total Liability for unpaid losses and loss adjustment expenses Liability for Claims and Claims Adjustment Expense Treasury stock, at cost; 2025 - 1,368,489,324 shares; 2024 - 1,300,512,040 shares of common stock Treasury Stock, Common, Value Apartments Apartment Building [Member] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Mortgage and other loans receivable, allowance for credit losses Allowance for credit losses Allowance for credit losses Allowance, beginning of year Allowance, end of year Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Schedule of Stock Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Unrecognized tax benefits, interest and penalties accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Basic (in shares) Weighted average common shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Unrecognized tax benefits, if recognized would favorably affect the effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Net realized gains (losses), net investment income Realized Other Investment Gains (Losses, Adjustment To Net Investment Income Realized Other Investment Gains (Losses, Adjustment To Net Investment Income Exercisable, end of year (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Rent expense Operating Lease, Expense Debt Disclosure [Abstract] Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Scenario [Domain] Scenario [Domain] Liability for Unpaid Losses and Loss Adjustment Expenses (Loss Reserves) Unpaid Policy Claims and Claims Adjustment Expense, Policy [Policy Text Block] Increase (decrease) in unrealized appreciation (depreciation) of investments OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] 2031-2035 Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Interest on mortgage and other loans Financing Receivable [Member] Financial Instruments Owned and Pledged as Collateral [Table] Financial Instruments Owned and Pledged as Collateral [Table] Liability for Unpaid Losses and Loss Adjustment Expenses, Future Policy Benefits SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense Subsequent Events Subsequent Events [Text Block] Change in foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year In good standing Financial Asset, Not Past Due [Member] Bonds available for sale, allowance for credit losses Allowance for Credit Losses Balance, beginning of period Balance, end of year Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Change in the fair value of market risk benefits, net Disposal Group, Including Discontinued Operation, Market Risk Benefit, Increase (Decrease) From Fair Value Change Disposal Group, Including Discontinued Operation, Market Risk Benefit, Increase (Decrease) From Fair Value Change Total liabilities Total liabilities Liabilities Issuances and Settlements Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements Common stock, $2.50 par value; 5,000,000,000 shares authorized; shares issued: 2025 - 1,906,671,492 and 2024 - 1,906,671,492 Common Stock, Value, Outstanding Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Debt redeemed Debt Instrument, Repurchased Face Amount Expected annual pension contributions Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year Deferred Stock Units (DSUs) Deferred Stock Units (DSUs) [Member] Deferred Stock Units (DSUs) Alternative equity security Other Security Investments [Member] Income from discontinued operations, net of income taxes before loss on disposal of discontinued operations Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax Mortgage-backed, asset-backed and collateralized Asset-Backed Securities [Member] Counterparty Name [Axis] Counterparty Name [Axis] Summary of Outstanding Share-Settled RSU Grants Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Deferred tax liabilities: Components of Deferred Tax Liabilities [Abstract] Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Reinsurance assets, net Increase (Decrease) In Reinsurance Assets, Net The net change during the reporting period in the amount of benefits the ceding insurer expects to recover on insurance policies ceded to other insurance entities as of the balance sheet date for all guaranteed benefit types and the change in funds held under reinsurance agreements or treaty (contract between the reinsurer and the ceding entity stipulating the manner in which insurance written on various risks is to be shared). Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Total amounts recognized Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position Year 10 (as a percent) Short-Duration Insurance Contracts, Historical Claims (Benefits) Duration, Year 10 Short-Duration Insurance Contracts, Historical Claims (Benefits) Duration, Year 10 Reserve for unearned premiums Unearned Premiums, Net Unearned Premiums, Net Hotel Hotel [Member] Discount on workers' compensation lines Discount On Workers Compensation Lines [Member] Discount On Workers Compensation Lines Disposition of subsidiaries Effective Income Tax Rate Reconciliation, Disposition of Business, Amount Debt and Equity Securities, FV-NI [Line Items] Debt and Equity Securities, FV-NI [Line Items] Total net realized losses Realized Investment Gains (Losses) Constant default rate Measurement Input, Default Rate [Member] 2030 Tax Year 2030 [Member] Tax Year 2030 Cash Collateral Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset Award Timing Predetermined Award Timing Predetermined [Flag] Credit contracts Credit Risk Contract [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Amount Reinsurance asset, allowance for credit loss Reinsurance Asset, Allowance For Credit Loss Reinsurance Asset, Allowance For Credit Loss Tabular List, Table Tabular List [Table Text Block] Junior Subordinated Debt, General Borrowing Junior Subordinated Debt, General Borrowing [Member] Junior Subordinated Debt, General Borrowing 2019 Short-Duration Insurance Contract, Accident Year 2019 [Member] Divestitures, net Sales of divested businesses Proceeds from Divestiture of Businesses, Net of Cash Divested Net loss reserve discount Total reserve discount Loss Reserve Discount Represents the discount of loss reserves to present value for claims that won't be paid for an extended period of time. Goodwill [Line Items] Goodwill [Line Items] Condensed Cash Flow Statement [Table] Condensed Cash Flow Statement [Table] Measurement Basis [Axis] Measurement Basis [Axis] Dividends on preferred stock and preferred stock redemption premiums Dividends on preferred stock and preferred stock redemption premiums Payments Of Dividends, Preferred Stock And Preferred Stock Redemption Premium Payments Of Dividends, Preferred Stock And Preferred Stock Redemption Premium Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Unearned Premiums SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Unearned Premium Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Stock, Class of Stock [Table] Stock, Class of Stock [Table] Due after ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Consolidation Consolidation, Policy [Policy Text Block] U.S. income taxes on non-U.S. insurance companies Effective Income Tax Rate Reconciliation, FDII, Amount Notional Amount Derivative Asset, Notional Amount Percent of Pre-Tax Income (Loss) Effective Income Tax Rate Reconciliation, Percent [Abstract] Impairments of assets Asset Impairment Charges Total AIG shareholders’ equity Equity, Attributable to Parent Schedule of Available-for-sale Securities [Table] Debt Securities, Available-for-Sale [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Insider Trading Policies and Procedures [Line Items] Investments [Table] Investments [Table] This table lists the investments. The line items identify information about the investment. Recurring Basis Fair Value, Recurring [Member] U.S. state & local: State and Local Jurisdiction [Member] Funds withheld investment assets Funds Held under Reinsurance Agreements, Asset Cover [Abstract] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Discontinued Operations Presentation Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Maximum Maximum [Member] Secondary Offering, Including Over-Allotment Option Secondary Offering, Including Over-Allotment Option [Member] Secondary Offering, Including Over-Allotment Option Fair Value, Total Debt Securities, Available-for-Sale, Unrealized Loss Position INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) Mortgage and other loans receivable, net of allowance Mortgage And Other Loans Receivable [Member] Mortgage And Other Loans Receivable Contractual deductible recoverable amount Contractual Deductible Recoverable Amount Represents contractual deductible recoverable amounts due from policyholders. Structured Structured Investment [Member] Structured Investment Insurance contract losses Short Duration Insurance Contracts Losses Paid Net Short Duration Insurance Contracts Losses Paid Net Other assets Other Assets [Member] Schedule of Asset Allocation Percentage by Major Asset Class and Target Allocation Schedule Of Defined Benefit Plan Assets Actual And Target Allocations [Table Text Block] Schedule Of Defined Benefit Plan Assets Actual And Target Allocations Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income from continuing operations before income tax expense Income from continuing operations before income tax expense Corebridge pre-tax income (loss) Income (loss) from continuing operations before income tax expense (benefit) Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Net results of businesses in run-off, net investment income, reconciliation to income (loss) from continuing operations before income tax expense Income (Loss) From Businesses In Run-Off, Adjusted Pre-Tax Income (Loss) Income (Loss) From Businesses In Run-Off, Adjusted Pre-Tax Income (Loss) Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Recourse Status [Domain] Recourse Status [Domain] Insurance reserves Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve Statement of Stockholders' Equity [Abstract] Reportable Segments Operating Segments [Member] Schedule of Income Taxes Paid (Refunded) Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Policyholder benefits and losses incurred Disposal Group, Including Discontinued Operation, Policyholder Benefits And Claims Incurred Disposal Group, Including Discontinued Operation, Policyholder Benefits And Claims Incurred Value of other intangible assets Other Intangible Assets, Net Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Less: Comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Term of transition services payments Asset Acquisition, Transition Services Payment, Term Asset Acquisition, Transition Services Payment, Term Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Defined benefit plan effect of one hundred basis point decrease in expected long term rate of return Defined Benefit Plan Effect Of One Hundred Basis Point Decrease In Expected Long Term Rate Of Return Defined Benefit Plan Effect Of One Hundred Basis Point Decrease In Expected Long Term Rate Of Return Notes Due 2030 Notes Due 2030 [Member] Notes Due 2030 Subtotal, adjusted pre-tax basis Subtotal, Excluding Business in Run-Off [Member] Subtotal, Excluding Business in Run-Off Unsettled receivable Other Receivables Number of countries in which the entity operates Number of Countries in which Entity Operates Less than 1.00X Debt Service Coverage Ratio Range Three [Member] Debt service ratio which is less than 1x Document Fiscal Period Focus Document Fiscal Period Focus Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Fair Value Option Fair Value Option, Disclosures [Table Text Block] Historic volatility term Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Historical Volatility Term Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Historical Volatility Term Income from continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Accumulated benefit obligation Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation Total Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss Award Type [Axis] Award Type [Axis] Investment, Name [Domain] Investment, Name [Domain] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Changes in valuation allowances Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Unrealized Appreciation (Depreciation) of Fixed Maturity Securities on Which Allowance for Credit Losses Was Taken AOCI, Gain (Loss), Debt Securities, Available-for-Sale, with Allowance for Credit Loss, Parent [Member] Reserve for liability to unpaid losses Liability for Unpaid Losses and Loss Adjustment Expenses, Reserve for Current Expected Credit Losses Liability for Unpaid Losses and Loss Adjustment Expenses, Reserve for Current Expected Credit Losses Entity Address, City or Town Entity Address, City or Town Validus Re Validus Re [Member] Validus Re Schedule of Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs Defined Benefit Plan Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Table Text Block] Defined Benefit Plan Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Net benefit cost (credit) Defined Benefit Plan Net Benefit Cost Amount of net benefit cost (credit) for defined benefit plan. Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Other liabilities Other Liabilities Including Intercompany Other Liabilities Including Intercompany Year 3 (as a percent) Short-Duration Insurance Contracts, Historical Claims Duration, Year Three Schedule II Condensed Financial Information of Parent Company Only Disclosure [Text Block] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] CLO/ABS Certain Collateralized Loan Obligations And Asset Backed Securities Securitized Loans And Receivables [Member] Certain Securities that are collateralized by a pool of assets and asset-backed securities that are repaid with cash flows derived from credit card receivables, car loans, recreational vehicle loans, mobile home loans and similar financial assets that are being securitized. Other assets Other, fair value Other Assets, Fair Value Disclosure Other bond securities Debt Securities, Fixed Maturity [Member] Debt Securities, Fixed Maturity Short-Duration Insurance Short-Duration Insurance, Other [Member] Assets Assets for Plan Benefits, Defined Benefit Plan Increase (decrease) in deferred tax asset valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Derivative Instruments and Hedging Activities Disclosure [Abstract] Change in projected benefit obligation: Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Pledged Status [Domain] Pledged Status [Domain] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Loss from discontinued operations (in dollars per share) Loss from discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Other assets, including restricted cash of $16 in 2025 and $15 in 2024 (portion measured at fair value: 2025 - $135; 2024 - $179) Other assets Other Other Assets Fair Value Beginning of Period Fair Value End of Period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Reconciliation of Net Prior Year Development Before the ADC Cessions to the Net Prior Year Development After ADC Cessions and Amortization of Deferred Gain Reconciliation Of Change In Net Ultimate Loss And Loss Adjustment Expense To Prior Year Development [Table Text Block] Reconciliation Of Change In Net Ultimate Loss And Loss Adjustment Expense To Prior Year Development Derivatives designated as hedging instruments Designated as Hedging Instrument [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Hedging Relationship [Axis] Hedging Relationship [Axis] AIG Financial Products AIG Financial Products [Member] AIG Financial Products Condensed Cash Flow Statements, Captions [Line Items] Condensed Cash Flow Statements, Captions [Line Items] Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs [Text Block] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Redemption price (as a percent) Debt Instrument, Redemption Price, Percentage Tax exempt interest Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent Unvested, beginning of year (in shares) Unvested, end of year (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Secured Ceded Credit Risk, Secured [Member] Other Liabilities Other Liabilities, Policy [Policy Text Block] Other Liabilities, Policy Fixed maturity securities and other invested assets transferred in connection with reinsurance transactions Noncash Or Part Noncash, Securities Transferred In Connection With Reinsurance Transaction Noncash Or Part Noncash, Securities Transferred In Connection With Reinsurance Transaction Net cash provided by operating activities Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Defined benefit plan, weighted-average discount rate Defined Benefit Plan Weighted Average Discount Rate Defined Benefit Plan Weighted Average Discount Rate Debt instrument term Debt Instrument, Term Available for sale securities Proceeds from Sale of Debt Securities, Available-for-Sale Bonds available for sale, at fair value, net of allowance for credit losses of $37 in 2025 and $38 in 2024 (amortized cost: 2025 - $71,772; 2024 - $66,195) Bonds available for sale Total Fixed maturity securities - available for sale Debt Securities, Available-for-Sale, Excluding Accrued Interest Subsequent event Subsequent Event [Member] Schedule of Weighted-Average Assumptions Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Mutual funds Money Market Funds [Member] Loans to subsidiaries - net Proceeds from Collection of (Payments to Fund) Long-Term Loans to Related Parties Equity Components [Axis] Equity Components [Axis] 2022 Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Notes Due 2026 Notes Due 2026 [Member] Notes Due 2026 Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] UK/Europe Property and Special Risks UK/Europe Property and Special Risks [Member] UK/Europe Property and Special Risks Deferred tax assets: Components of Deferred Tax Assets [Abstract] Common stock issued under stock plans Stock Issued During Period, Value, Treasury Stock Reissued Variable Interest Entities Variable Interest Entity Disclosure [Text Block] Financial Asset, Aging [Domain] Financial Asset, Aging [Domain] Number of Loans Financing Receivable, Number Of Loans Indicates the number of financing receivables under each classification. Foreign: Foreign Income Tax Expense (Benefit), Continuing Operations [Abstract] Amount at which shown in the Balance sheet SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount Defined contribution plans, costs Defined Contribution Plan, Cost Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Document Annual Report Document Annual Report Mortgage-backed, asset-backed and collateralized Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Repayments of debt Repayments of long-term debt Repayments of Long-Term Debt Mutual funds Mutual Fund [Member] Foreign currency translation gain (loss) adjustment related to net investment hedge relationships Derivatives used in Net Investment Hedge, Increase (Decrease), Gross of Tax Purchase price adjustment, percent of actual premiums written (as a percent) Asset Acquisition, Consideration Transferred, Percent Of Actual Premiums Written During Current Year Asset Acquisition, Consideration Transferred, Percent Of Actual Premiums Written During Current Year Change in foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Aggregate Intrinsic Value, options exercisable, end of year Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Schedule of Net Deferred Tax Assets (Liabilities) Schedule of Net Deferred Tax Assets, Liabilities [Table Text Block] Tabular disclosure of the deferred tax asset or liability recognized by the entity on a jurisdictional basis, including the impact to other comprehensive income and valuation allowance. The jurisdictional basis is comprised of U.S. domestic and a combined foreign, state and local presentation. All other derivatives and hedge accounting Gain (Loss) on Sale of Derivatives NICO NICO [Member] National Indemnity Company, a subsidiary of Berkshire Hathaway. Ownership [Domain] Ownership [Domain] Fortitude Re funds withheld embedded derivative Modified Coinsurance And Funds Withheld Embedded Derivatives [Member] Modified Coinsurance And Funds Withheld Embedded Derivatives [Member] Notes Due 2035 Notes Due 2035 [Member] Notes Due 2035 Balance, Beginning of year Balance, End of year SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount 2027 Defined Benefit Plan, Expected Future Benefit Payment, Year Two Policy and Contract Claims SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable U.S. Personal Insurance U.S. Personal Insurance [Member] U.S. Personal Insurance Term used to determine yield for continuously compounded rates Share-Based Compensation Arrangement By Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Remaining Performance Period Used To Determine Yield Share-Based Compensation Arrangement By Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Remaining Performance Period Used To Determine Yield Schedule of Maturities of Long-Term Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Dividends received in the form of securities Return Of Capital And Dividend Received Return Of Capital And Dividend Received Schedule of Credit Quality Financing Receivable Credit Quality Indicators [Table Text Block] Futures Defined Benefit Plan, Derivative [Member] Total losses and loss adjustment expenses incurred Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Defined Benefit Plan [Table] Defined Benefit Plan [Table] Offices Office Building [Member] Losses and tax credit carryforwards Deferred Tax Assets Operating Loss and Tax Credit Carryforwards Deferred Tax Assets Operating Loss and Tax Credit Carryforwards Contract Claims Recoverable Contract Claims Recoverable [Member] Contract Claims Recoverable Entity Filer Category Entity Filer Category Valuation Allowance by Deferred Tax Asset [Axis] Valuation Allowance by Deferred Tax Asset [Axis] AIG assets AIG assets Defined Benefit Plan, Benefit Obligation, Benefits Paid Unrecognized compensation cost related to grants Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount U.S. federal income tax at statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Subsequent Event Type [Axis] Subsequent Event Type [Axis] Fixed assets and intangible assets Deferred Tax Assets Property Plant And Equipment And Other Finite Lived Assets Deferred Tax Assets Property Plant And Equipment And Other Finite Lived Assets Pre-tax gain on sale Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax 76% to 80% Debt-To-Value Ratio, Between 76 And 80 Percent [Member] Loan to value ratio which is greater than 76 percent but less than 80 percent. Statement of Financial Position Location, Balance [Axis] Statement of Financial Position Location, Balance [Axis] Other bond securities Bonds [Member] Amortization of Deferred Policy Acquisition Costs SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost Total benefits, losses and expenses Benefits, Losses and Expenses Entity Address, Address Line One Entity Address, Address Line One Cost SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost Accumulated Other Comprehensive Income (Loss) Total AOCI Attributable to Parent [Member] Investments [Domain] Investments [Domain] Reinsurance recoverable Reinsurance recoverable Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below Reinsurance Recoverable for Unpaid Claims and Claims Adjustments Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Ownership [Axis] Ownership [Axis] Other invested assets Sales and maturities of investments Proceeds from Sale and Maturity of Other Investments Rollforward of Common Stock Outstanding Schedule of Stock by Class [Table Text Block] Net investment income: Net Investment Income [Abstract] Retirement Plan Liabilities Adjustment Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] Other Liabilities Other Liabilities [Member] Percent of net present value of scheduled interest payments required to be collateralized by Corebridge Debt instrument, Collateral, Percent Of Net Present Value Of Scheduled Interest Payments Debt instrument, Collateral, Percent Of Net Present Value Of Scheduled Interest Payments U.S. Other Casualty U.S. Other Casualty [Member] U.S. Other Casualty Weighted average loan-to-value ratio (as a percent) Weighted Average Loan To Value Ratio Weighted Average Loan To Value Ratio Net operating loss carryforwards, gross Operating Loss Carryforwards Real Estate and Investment Entities Real Estate and Investment Funds [Member] Variable interest entities consisting of real estate and investment funds. Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Purchase of investments Purchase of investments Payments to Acquire Investments Share-based compensation expense - pre-tax, not yet recognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Fair Value Measurement Inputs and Valuation Techniques Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] 2021 Short-Duration Insurance Contract, Accident Year 2021 [Member] 2027 Lessee, Operating Lease, Liability, to be Paid, Year Two Weighted Average Remaining Contractual Life Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Expected volatility term Number Of Days Expected Volatility Number Of Days Expected Volatility Germany GERMANY Schedule of Net Asset Value Per Share Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table Text Block] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Condensed Statement of Income Captions [Line Items] Condensed Statement of Income Captions [Line Items] Proceeds from (payments for) Payments for (Proceeds from) Financing Activities [Abstract] Payments for (Proceeds from) Financing Activities [Abstract] Schedule of Funded Status of the Plans Reconciled to the Amount Reported in the Balance Sheets Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block] Premiums and other receivables, net of allowance for credit losses and disputes of $131 in 2025 and $127 in 2024 Premiums and Other Receivables, Net Net change in short-term investments Payments for (Proceeds from) 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divestitures and other Net (gain) loss on divestitures and other Net gain (loss) on divestitures and other Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Asset Pledged as Collateral Asset Pledged as Collateral [Member] Excluding Fortitude Re funds withheld assets Excluding Fortitude Re Funds Withheld Assets Investments Excluding Modified Coinsurance And Funds Withheld Assets [Member] Investments Excluding Modified Coinsurance And Funds Withheld Assets [Member] Discontinued Operations Presentation Discontinued Operations, Policy [Policy Text Block] Change in plan assets: Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Fortitude RE Fortitude RE [Member] Fortitude RE [Member] Public utilities Public Utility, Bonds [Member] Other bond securities, at fair value Other bond securities Fixed maturity securities - fair value option Debt Securities, Trading Interest income Investment Income, Interest 2028 Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Three Year 6 (as a percent) Short-Duration Insurance Contracts, Historical Claims Duration, Year Six Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Consolidated Investments, Including Variable Interest Entities, Primarily Beneficiary Consolidated Investments, Including Variable Interest Entities, Primarily Beneficiary [Member] Consolidated Investments, Including Variable Interest Entities, Primarily Beneficiary Changes in valuation allowances Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Total losses and loss adjustment expenses paid Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Banks, trust and insurance companies Banks, Trust and Insurance, Equities [Member] Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Share-Based Payment Arrangement [Abstract] Income Statement [Abstract] Income Statement [Abstract] Schedule of Changes in Level 3 Plan Assets Measured at Fair Value Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block] Sale of Stock [Domain] Sale of Stock [Domain] All Accident Years Short Duration Insurance Contracts All Accident Years [Member] Short Duration Insurance Contracts All Accident Years Corebridge deconsolidation, net of tax Accumulated Gain (Loss), Deconsolidation of Investment, Including Portion Attributable to Noncontrolling Interest [Member] Accumulated Gain (Loss), Deconsolidation of Investment, Including Portion Attributable to Noncontrolling Interest Product and Service [Domain] Product and Service [Domain] Reinsurer Concentration Risk Reinsurer Concentration Risk [Member] Schedule of Assumptions Used to Estimate the Fair Value of PSUs Based on AIG's TSR Schedule Of Share Based Payment Award Performance Shares Units Valuation Assumptions Table Text Block [Table Text Block] Schedule Of Share Based Payment Award Performance Shares Units Valuation Assumptions Table Text Block Total net investment income Net Investment Income Net investment income Net Investment Income Total AIG Share- holders' Equity Parent [Member] Reportable Subsegments Reportable Subsegments [Member] Equity method investment period Equity Method Investment, Investment Period Equity Method Investment, Investment Period Tax exempt interest Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount Extension period (in years) Fair Value, Investments Entities That Calculate Net Asset Value Per Share Liquidating Investment Average Original Expected Lives, Extension Increment Fair Value, Investments Entities That Calculate Net Asset Value Per Share Liquidating Investment Average Original Expected Lives, Extension Increment Rollforward of the Changes in the Allowance for Credit Losses Financing Receivable, Allowance for Credit Loss [Table Text Block] AIG 2021 Omnibus Incentive Plan AIG 2021 Omnibus Incentive Plan [Member] AIG 2021 Omnibus Incentive Plan Defined benefit plan effect of one hundred basis point increase in discount rate Defined Benefit Plan Effect Of One Hundred Basis Point Increase In Discount Rate Defined Benefit Plan Effect Of One Hundred Basis Point Increase In Discount Rate Net deferred tax assets (liabilities) in AOCI Deferred Tax Assets, Liabilities Federal before Valuation Allowance Included in Other Comprehensive Income Deferred Tax Assets, Liabilities Federal before Valuation Allowance Included in Other Comprehensive Income Issuances and Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Defined Benefit Plan, Plan Assets, Category [Line Items] Defined Benefit Plan, Plan Assets, Category [Line Items] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Amortization of deferred gain on retroactive reinsurance Amortization Of Deferred Gain On Retroactive Reinsurance Amortization Of Deferred Gain On Retroactive Reinsurance Change in the discount rates used to measure traditional and limited payment long-duration insurance contracts AOCI, Market Risk Benefit, Change In Discount Rates, Including Portion Attributable to Noncontrolling Interest [Member] AOCI, Market Risk Benefit, Change In Discount Rates, Including Portion Attributable to Noncontrolling Interest Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Accrued interest receivable Interest Receivable Assets: Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Assets [Abstract] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Assets Employer match to employee contribution (as a percent) Defined Contribution Plan, Employer Matching Contribution, Percent of Match Sale of Assets Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Real assets Real Estate And Infrastructure Private Equity Funds [Member] Represents the other private equity funds category of investment, which includes investments with portfolio exposure primarily in real estate properties and infrastructure positions, including power plants and other energy generating facilities. U.S. Federal: Federal Income Tax Expense (Benefit), Continuing Operations [Abstract] Losses and loss adjustment expenses recognized within gain on divestitures Liability for Unpaid Claims and Claims Adjustment Expense, Divestitures Liability for Unpaid Claims and Claims Adjustment Expense, Divestitures Amortization of net (gain) loss Defined Benefit Plan, Amortization of Gain (Loss) Effective Income Tax Rate Reconciliation [Line Items] Effective Income Tax Rate Reconciliation [Line Items] Other liabilities (portion measured at fair value: 2025 - $162; 2024 - $251) Other Liabilities Goodwill Net goodwill, beginning balance Net goodwill, ending balance Goodwill Current year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Equity contracts Equity Contract [Member] Net realized losses Net realized losses on Fortitude Re funds withheld assets Net realized gains (losses) Gain (Loss) on Investments Deferred Deferred Federal Income Tax Expense (Benefit) Corebridge Financial Inc Corebridge Financial Inc [Member] Corebridge Financial Inc Auditor Name Auditor Name Share-based compensation payments excess tax effect Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount Other invested assets Other Invested Assets [Member] Other investments not otherwise specified in the taxonomy. Accumulated impairments Goodwill, Impaired, Accumulated Impairment Loss U.S. government and government sponsored entities US Treasury and Government [Member] Principal payments received on and sales of mortgage and other loans receivable Proceeds from Sale and Collection of Mortgage Notes Receivable Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Tax Expense (Benefit) Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Credit Concentration Risk Credit Concentration Risk [Member] Constant prepayment rate Measurement Input, Constant Prepayment Rate [Member] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Net gains recognized during the period on equity securities and other investments Equity Securities, FV-NI, Gain (Loss) Derivative Instrument [Axis] Derivative Instrument [Axis] Plan assets Plan assets Defined Benefit Plan, Plan Assets, Benefits Paid Fixed maturity securities available for sale received in connection with pension risk transfer transactions attributed to discontinued operations Fixed maturity securities available for sale received in connection with pension risk transfer transactions Fixed maturity securities available for sale received in connection with pension risk transfer transactions Restricted cash Restricted Cash Redemption of preferred stock Redemption of preferred stock Payments for Repurchase of Preferred Stock and Preference Stock Schedule of Accumulated Benefit Obligations Schedule of Accumulated and Projected Benefit Obligations [Table Text Block] Insurance contracts Insurance Contracts [Member] Insurance Contracts Investments: Investments [Abstract] Fair Value Debt Securities, Fair Value Losses [Abstract] Debt Securities, Fair Value Losses Entity [Domain] Entity [Domain] Settlements Defined Benefit Plan, Plan Assets, Payment for Settlement Net cash provided by (used in) investing activities Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Less than 65% Debt-To-Value Ratio, Less than 65 Percent [Member] Loan to value ratio which is less than 65 percent. Gain (loss) on disposal of business Gain (Loss) on Disposition of Business Premiums and other related payables Accrued Premiums And Other Accrued Expenses Accrued Premiums And Other Accrued Expenses Document Fiscal Year Focus Document Fiscal Year Focus Summary of Short-Duration Insurance Premiums Written and Earned Effects of Reinsurance [Table Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Nonrecourse Nonrecourse [Member] Schedule of Gain (Loss) on Securities [Table] Schedule of Gain (Loss) on Securities [Table] Rollforward of Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs [Table Text Block] Decreases in tax positions for prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Carrying Value Reported Value Measurement [Member] Vesting period (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition North America North America [Member] International Defined Benefit Plan, Equity Securities, Non-US [Member] Premiums earned: Premiums Earned, Net [Abstract] Derivatives and Hedge Accounting Derivatives, Policy [Policy Text Block] Segment Information Segment Reporting Disclosure [Text Block] Goodwill [Table] Goodwill [Table] Derivatives not designated as hedging instruments Not Designated as Hedging Instrument [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair value of plan assets, beginning of year Fair value of plan assets, end of year Defined benefit plan, plan assets, amount Defined Benefit Plan, Plan Assets, Amount Not Rated Not Rated [Member] Not Rated [Member] Other Commitments [Line Items] Other Commitments [Line Items] Summary of Significant Accounting Policies [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Axis] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Loans Receivable Loans Receivable [Member] Redemption of preferred stock Outstanding par and additional paid in capital amount of preferred stock Stock Redeemed or Called During Period, Value Open tax year Open Tax Year Onex Corporation Onex Corporation [Member] Onex Corporation Settlement loss Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Industrial Industrial Property [Member] AIGFP Operating AIGFP Operating [Member] AIGFP Operating Aggregate purchase price for sale of stock Sale of Stock, Consideration Received on Transaction Revolving Credit Facility Revolving Credit Facility [Member] Segments [Axis] Segments [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Other, net Other, net Payment for (Proceeds from) Other Investing Activity Dispositions of subsidiaries Effective Income Tax Rate Reconciliation, Disposition of Business, Percent Off-balance-sheet commitments Off-Balance-Sheet, Credit Loss, Liability Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Deferred Policy Acquisition Costs SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost Debt Instrument [Axis] Debt Instrument [Axis] Employee Benefits Retirement Benefits [Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] (Gain) loss on extinguishment of debt (Gain) loss on extinguishment of debt Gain (loss) on extinguishment of debt Gain on extinguishment of debt Gain (Loss) on Extinguishment of Debt Credit Facility [Domain] Credit Facility [Domain] AIG shareholders’ equity: Equity, Attributable to Parent [Abstract] Income from discontinued operations before income tax expense and loss on disposal of discontinued operations Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax Others Other Financing Receivable [Member] Class of financing receivables related to other commercial financing receivables not otherwise specified. Reimbursable purchase price, percent of gross written premiums paid and payable less than aggregate premiums (as a percent) Asset Acquisition, Consideration Transferred, Reimbursable Purchase Price, Percent Of Gross Written Premiums Paid And Payable, Less Than Aggregate Premiums Asset Acquisition, Consideration Transferred, Reimbursable Purchase Price, Percent Of Gross Written Premiums Paid And Payable, Less Than Aggregate Premiums Interest rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Investment, Name [Axis] Investment, Name [Axis] Entity Voluntary Filers Entity Voluntary Filers Amounts recognized in the balance sheet: Balance Sheet Related Disclosures [Abstract] Securities for which allowance for credit losses was not previously recorded Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not Previously Recorded Schedule of Other Invested Assets Schedule Of Other Invested Assets [Table Text Block] Schedule Of Other Invested Assets 65% to 75% Debt-To-Value Ratio, Between 65 And 75 Percent [Member] Loan to value ratio which is greater than 65 percent but less than 75 percent. Short-duration Insurance Contracts, Accident Year [Domain] Short-Duration Insurance Contracts, Accident Year [Domain] Contingencies, Commitments and Guarantees Commitments Contingencies and Guarantees [Text Block] Derivative assets Fair Value Derivative Asset, Subject to Master Netting Arrangement, before Offset Entity Registrant Name Entity Registrant Name Ceded Credit Risk, Collateralization [Axis] Ceded Credit Risk, Collateralization [Axis] Net benefit expense (less than) Net periodic benefit cost (credit) Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Change in prior service cost Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), After Reclassification, Before Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), After Reclassification, Before Tax Other income (expense) - net Other Operating Income (Expense), Net, Investment Income Other Operating Income (Expense), Net, Investment Income Fortitude Holdings Fortitude Holdings Fortitude Holdings [Member] Fortitude Holdings [Member] Number of securities in an unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Change in the discount rates used to measure traditional and limited payment long-duration insurance contracts AOCI, Market Risk Benefit, Change In Discount Rates, Parent [Member] AOCI, Market Risk Benefit, Change In Discount Rates, Parent Effect of cross-border tax laws, net of related tax credits: Effective Income Tax Rate Reconciliation, Cross-Border Tax Effect, Amount [Abstract] Interest cost Defined Benefit Plan, Interest Cost Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Related Party [Axis] Related and Nonrelated Parties [Axis] Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Adjusted net investment income not available for dividends (as a percent) Statutory Accounting Practices Adjusted Net Investment Income Not Available for Dividends Percentage Statutory Accounting Practices Adjusted Net Investment Income Not Available for Dividends Percentage Restatement Determination Date: Restatement Determination Date [Axis] Other Assets Other Assets, Policy [Policy Text Block] Other Assets, Policy Deferred Deferred Foreign Income Tax Expense (Benefit) Purchase price adjustment period Asset Acquisition, Consideration Transferred, Adjustment Period Asset Acquisition, Consideration Transferred, Adjustment Period Loss recognized on discontinued operation Loss on disposition of operations, net of tax After-tax loss on sale of Corebridge Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Contributions from noncontrolling interests Noncontrolling Interest, Increase from Subsidiary Equity Issuance Other, net Proceeds from (Payment for) Other Financing Activity Transfers In Defined Benefit Plan Transfers In Defined Benefit Plan Transfers In Name Trading Arrangement, Individual Name Bifurcated embedded derivatives assets, fair value Embedded Derivative, Fair Value of Embedded Derivative Asset Unrealized Appreciation (Depreciation) of Fixed Maturity Securities on Which Allowance for Credit Losses Was Taken AOCI, Gain (Loss), Debt Securities, Available-for-Sale, with Allowance for Credit Loss, Including Noncontrolling Interest [Member] Reclassified to held for sale, net of reinsurance recoverables Changes In Sales and Reinsurance Transaction, Adjustment Changes In Sales and Reinsurance Transaction, Adjustment Amount of debt issued Debt Instrument, Face Amount Loans from subsidiaries - net Proceeds From Payments For Long-Term Loans For Affiliates Financing Activities Proceeds From Payments For Long-Term Loans For Affiliates Financing Activities Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Other carryforwards Tax Effect On Other Carryforwards And Other Tax Effect On Other Carryforwards And Other Deferred Tax Asset, Valuation Allowance [Table] Deferred Tax Asset, Valuation Allowance [Table] Liability for Future Policy Benefit, by Product Segment [Line Items] Liability for Future Policy Benefit, by Product Segment [Line Items] Accident Years 2015 and Prior Accident Years 2015 And Prior [Member] Accident Years 2015 and Prior [Member] Unvested, beginning of year (in dollars per share) Unvested, end of year (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Other Other Private Equity Funds [Member] Represents the other private equity funds category of investment which includes multi strategy and mezzanine strategies. Condensed Statement of Comprehensive Income [Table] Condensed Statement of Comprehensive Income [Table] Deposit Accounting Assets and Liabilities Deposit Contracts, Policy [Policy Text Block] ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Employer matching contribution,, percentage of employees' gross pay (as a percent) Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Fair Value Using NAV Per Share (or its equivalent) Alternative investments Alternative Investment Thereafter Long-Term Debt, Maturities, Repayments of Principal in Rolling after Year Five Payments for reimbursable expenses for Everest Payments For Asset Acquisition, Reimbursable Expenses Payments For Asset Acquisition, Reimbursable Expenses Derivative liability, Fair value of collateral Derivative Liability, Fair Value of Collateral Long Term Incentive Plans Long Term Incentive Plans [Member] Long Term Incentive Plans Liability Class [Axis] Liability Class [Axis] Notes And Bonds Payable Notes And Bonds Payable [Member] Notes And Bonds Payable Foreign: Foreign Tax Jurisdiction [Member] Net realized gains (losses) - Excluding Fortitude Re Funds Withheld Assets Net realized gains (losses) - Excluding Fortitude Re Funds Withheld Assets [Member] Net realized gains (losses) - Excluding Fortitude Re Funds Withheld Assets Excluding modified coinsurance and funds withheld embedded derivative Excluding Modified Coinsurance And Funds Withheld Embedded Derivative [Member] Excluding Modified Coinsurance And Funds Withheld Embedded Derivative [Member] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Fixed maturity securities Available for sale fixed maturity securities, including short-term investments Fixed Maturities [Member] Benefit obligation, beginning of year Projected benefit obligation, end of year Defined Benefit Plan, Benefit Obligation Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Consolidated Entity, Excluding Consolidated VIE Consolidated Entity, Excluding Consolidated VIE [Member] Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net Alternative investments Alternative Investments [Member] Represents the investment in hedge funds, private equity funds, affordable housing partnerships and other investment partnerships by the entity. Retained interest in certain investment entities and other assets Other invested assets Invested Assets, Other, Fair Value This element represents the portion of the balance sheet assertion valued at fair value by the entity. The fair value of investments not otherwise specified in the taxonomy. Gross Derivative Assets Derivative Asset [Abstract] Issuers Of Credit Default Swaps [Axis] Issuers Of Credit Default Swaps [Axis] Issuers Of Credit Default Swaps Available for sale securities Payments to Acquire Debt Securities, Available-for-Sale Current year Current Year Claims and Claims Adjustment Expense Amortization expense Deferred Policy Acquisition Costs, Amortization Expense Liability for Claims and Claims Adjustment Expense [Table] Liability for Claims and Claims Adjustment Expense [Table] Premiums Net Premiums Earned Net Premiums Earned, Net U.S. Workers' Compensation (before discount) Us Workers Compensation [Member] Us Workers Compensation Realized Gain (Loss) on Investments Realized Gain (Loss) on Investments [Table Text Block] Contingencies, commitments and guarantees (See Note 15) Commitments and Contingencies Summary of Significant Accounting Policies [Table] Accounting Standards Update and Change in Accounting Principle [Table] Non- redeemable Non- controlling Interests Noncontrolling Interest [Member] Investments [Line Items] Investments [Line Items] Line items represent reporting concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Equity Method Investments Equity Method Investments [Policy Text Block] Hedge Funds Hedge Funds, Equity [Member] Net deferred tax assets Total AIG net deferred tax assets (liabilities) Deferred Tax Assets, Net Ceded loss reserves Policyholder Benefits and Claims Incurred, Ceded PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Plan assets. actual allocation percentage Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage Forfeited or expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period Schedule of Projected Benefit Obligation in Excess of the Plan Assets and the Accumulated Benefit Obligation in Excess of the Plan Assets Schedule Of Benefit Obligations And Accumulated Benefit Obligations In Excess Of Fair Value Of Plan Assets Table Text Block [Table Text Block] Schedule Of Benefit Obligations And Accumulated Benefit Obligations In Excess Of Fair Value Of Plan Assets Table Text Block Diluted: Earnings Per Share, Diluted [Abstract] Schedule of Components of Loss Reserve Discount Schedule of Components of Loss Reserve Discount [Table Text Block] Schedule of Components of Loss Reserve Discount Schedule V SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Consolidated total amount, pre-tax income (loss) Income (Loss) from Continuing and Discontinued Operations before Income Taxes Extraordinary Items Noncontrolling Interest Income (Loss) from Continuing and Discontinued Operations before Income Taxes Extraordinary Items Noncontrolling Interest Other Fair Value, Net Derivative Asset (Liability) Measured On Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease), Other Fair Value, Net Derivative Asset (Liability) Measured On Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease), Other Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Projected benefit obligation Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation California CALIFORNIA Allocation of investments Allocation Of Investments Allocation Of Investments All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Excluding AIGFP Operating Excluding AIGFP Operating [Member] Excluding AIGFP Operating Name Forgone Recovery, Individual Name Amount Reclassified from AOCI Reclassification out of Accumulated Other Comprehensive Income [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Equity securities Equity securities: Defined Benefit Plan, Equity Securities [Member] Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Total VIE Assets Variable Interest Entity, Nonconsolidated Entities, Assets Variable Interest Entity, Nonconsolidated Entities, Assets Unrealized Appreciation (Depreciation) of All Other Investments AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Noncontrolling Interest [Member] Foreign Foreign [Member] Foreign Geographical [Axis] Geographical [Axis] Change in unrealized appreciation (depreciation) of investments OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, after Tax Gross Derivative Liabilities Derivative Liability [Abstract] Sales of alternative investments Gain Loss On Sale Of Alternative Investments Gain Loss On Sale Of Alternative Investments Other, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Loss reserve discount Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Loss Reserves Net Premiums Written SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Written Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Dividend income from consolidated subsidiaries SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries Statutory Accounting Practice, Jurisdiction [Domain] Statutory Accounting Practice, Jurisdiction [Domain] Losses and loss adjustment expenses paid: Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] Ownership (as a percent) Subsidiary, Ownership Percentage, Parent 2029 Long-Term Debt, Maturities, Repayments of Principal in Rolling Year Four U.S. income taxes on non- U.S. insurance companies Effective Income Tax Rate Reconciliation, FDII, Percent Embedded derivatives Embedded Derivative Financial Instruments [Member] Global Personal Travel Insurance Global Personal Travel Insurance [Member] Global Personal Travel Insurance Redemption premium realized Redemption Premium Bonds available for sale and short-term investments held in escrow Restricted Investments, Current Tax expense Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation Less: Dividends on preferred stock and preferred stock redemption premiums Less: Preferred stock dividends and preferred stock redemption premiums Preferred Stock Dividends and Other Adjustments SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] Shares purchased (in shares) Treasury Stock, Shares, Acquired Allowance for losses on Mortgage and other loans receivable Financing Receivable, Allowance for Credit Loss [Line Items] Service cost Defined Benefit Plan, Service Cost Measurement Frequency [Domain] Measurement Frequency [Domain] U.S. And Non-U.S. Life Insurance Companies, Available-for-Sale Portfolio U.S. And Non-U.S. Life Insurance Companies, Available-for-Sale Portfolio [Member] U.S. And Non-U.S. Life Insurance Companies, Available-for-Sale Portfolio Loss severity Measurement Input, Loss Severity [Member] Policy fees Disposal Group, Including Discontinued Operation, Policy Fees Disposal Group, Including Discontinued Operation, Policy Fees Equity Equity [Text Block] U.S. investment grade US Investment Grade [Member] US Investment Grade Mortgage and other loans receivable, net of allowance for credit losses of $37,747 in 2025 and $37,800 in 2024 Mortgage and other loans receivable Mortgage and other loans receivable, net Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Subsequent Event [Table] Subsequent Event [Table] Ceded reserves Liability for Future Policy Benefit, Ceded Liability for Future Policy Benefit, Ceded CDS Credit Default Swap [Member] Summary of Income Tax Examinations Summary of Income Tax Examinations [Table Text Block] Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Write Offs SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] U.S State & Local: State and Local Income Tax Expense (Benefit), Continuing Operations [Abstract] Purchase of common stock Purchase of common stock Payments for Repurchase of Common Stock Line of Credit Line of Credit [Member] Vested stock-settled awards related to accelerated vesting events Share-Based Payment Arrangement, Cash Used to Settle Award Purchases, Sales, Issuances and Settlements, Net Purchases, Sales, Issuances and Settlements, Net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases, (Sales), Issuances, (Settlements) Class of Stock [Axis] Class of Stock [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Dividend income Investment Income, Dividend Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Credit derivatives: Credit Derivatives [Line Items] Statement [Table] Statement [Table] Actual return on plan assets, net of expenses Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Adjustments to reconcile net income (loss) to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Short-duration Insurance Contracts, Accident Year [Axis] Short-Duration Insurance Contracts, Accident Year [Axis] Certain Notes And Debentures Issued Or Guaranteed, Tender Offer Certain Notes And Debentures Issued Or Guaranteed, Tender Offer [Member] Certain Notes And Debentures Issued Or Guaranteed, Tender Offer SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] Other jurisdictions Other Foreign Tax Jurisdiction, Other [Member] Retroactive reinsurance adjustment (net of discount) Liability For Unpaid Claims And Claims Adjustment Expense, Retroactive Reinsurance Adjustment Net Of Discount Represents the increase decrease in the liability for unpaid claims and claims adjustment expense due to reinsurance transaction net of discount. All other corporate debt securities Other Corporate Bonds [Member] Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Issuers Of Credit Default Swaps [Domain] Issuers Of Credit Default Swaps [Domain] Issuers Of Credit Default Swaps [Domain] Fair Value Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Schedule of Plan Assets Based on the Level Within the Fair Value Hierarchy in Which the Fair Value Measurement Falls Schedule of Allocation of Plan Assets [Table Text Block] Condensed Income Statements, Captions [Line Items] Condensed Income Statements, Captions [Line Items] Termination Date Trading Arrangement Termination Date 90 days or less delinquent Financial Asset, Less Than Or Equal To 90 Days Past Due [Member] Financial Asset, Less Than Or Equal To 90 Days Past Due SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Table] SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Table] Receivable [Domain] Receivable [Domain] Leases, weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent SEC Schedule, 12-17, Insurance Companies, Reinsurance [Table] SEC Schedule, 12-17, Insurance Companies, Reinsurance [Table] Computation of Basic and Diluted EPS Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Option Fair Value Option Election [Member] Fair Value Option Election [Member] Restricted cash included in Other assets Restricted Cash and Cash Equivalent, Noncurrent Subsequent Events [Abstract] Segment Reporting [Abstract] Variable Interest Entities By Type Of Activity [Axis] Variable Interest Entities By Type Of Activity [Axis] Variable Interest Entities By Type Of Activity Adverse Development Reinsurance Adverse Development Reinsurance [Member] Adverse Development Reinsurance SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] Net realized gains (losses) Sales of fixed maturity securities Debt Securities, Available-for-Sale, Realized Gain (Loss) Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Consolidated Entities [Axis] Consolidated Entities [Axis] Employee benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits Change in the discount rates used to measure traditional and limited payment long-duration insurance contracts OCI, Liability for Future Policy Benefit, Gain (Loss), after Reclassification Adjustment and Tax U.S. Run-Off Long Tail Insurance Lines U.S. Long Tail Insurance Lines [Member] U.S. Long Tail Insurance lines member Less: Net gains (losses) recognized during the period on equity securities and other investments sold during the period Equity Securities, FV-NI, Realized Gain (Loss) Change in net unrealized gains (losses), gross Debt Securities, Available-for-Sale, Unrealized Gain (Loss) Use of Estimates Use of Estimates, Policy [Policy Text Block] Federal and foreign valuation allowance for deferred tax assets SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] Issuances and Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table] Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Table] Counterparty netting Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Insider Trading Arrangements [Line Items] Prior year development ceded Increase (Decrease) in Reinsurance Recoverable Equity securities Equities Equity Securities [Member] Schedule of Loss Reserve Discount Schedule Of Loss Reserve Discount [Table Text Block] Tabular disclosure of net loss reserve discount and net loss reserve discount benefit (charge). Developments related to prior tax years under IRS review Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent Other Loans Other Portfolio Segment [Member] Other Portfolio Segment Value of share consideration received on transaction Disposal Group, Including Discontinued Operation, Consideration Received, Value Of Shares Disposal Group, Including Discontinued Operation, Consideration Received, Value Of Shares Increases in tax positions for current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Discounting of Reserves [Table] Discounting of Reserves [Table] Reflects the change in reserve liability resulting from the discount applied to reduce the reserve to present value. Reconciliation of activity in the Liability for unpaid claims and claims adjustment expense: Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Consolidation Items [Axis] Consolidation Items [Axis] Life insurance policy loans Life Insurance Policy Portfolio Segment [Member] Life Insurance Policy Portfolio Segment CLO/ABS CLO/ABS Collateralized Debt Obligations And Asset-backed Securities [Member] Securities that are collateralized by a pool of assets and asset-backed securities that are repaid with cash flows derived from credit card receivables, car loans, recreational vehicle loans, mobile home loans and similar financial assets that are being securitized. Corporate debt Corporate Debt Securities [Member] CVC Capital Partners plc, Private Equity Secondaries CVC Capital Partners plc, Private Equity Secondaries [Member] CVC Capital Partners plc, Private Equity Secondaries Other product lines Other Product Lines [Member] Other Product Lines Collateral posted Collateral Already Posted, Aggregate Fair Value