v3.5.0.2
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2016
Nov. 02, 2016
Document and Entity Information    
Entity Registrant Name AMERICAN INTERNATIONAL GROUP INC  
Entity Central Index Key 0000005272  
Document Type 10-Q  
Document Period End Date Sep. 30, 2016  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   1,027,135,119
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q3