v3.24.0.1
Summary of Significant Accounting Policies - Adjusted Balance Sheet to Apply Adopted Guidance (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Jan. 01, 2021
Dec. 31, 2020
Assets:          
Premiums and other receivables, net of allowance for credit losses and disputes of $139 in 2023 and $169 in 2022 $ 10,561 $ 13,243      
Deferred income taxes 14,445 14,804   $ 12,963  
Deferred policy acquisition costs 12,085 12,857   12,955  
Market risk benefit assets, at fair value 912 796   338 $ 338
Other assets 13,089 [1] 12,384 [1]   13,520  
Total assets 539,306 522,228   598,841  
Liabilities:          
Future policy benefits for life and accident and health insurance contracts 58,576 51,914   67,364  
Policyholder contract deposits 161,979 155,984   148,223  
Market risk benefit liabilities, at fair value 5,705 4,736   8,739 8,739
Other policyholder funds 3,356 3,463   3,796  
Other liabilities(c) 25,958 [1] 26,757 [1]   27,520  
Total liabilities 488,005 478,774   532,906  
Additional paid-in capital 75,810 79,915      
Retained earnings 37,516 34,893   16,437  
Accumulated other comprehensive loss (14,037) (22,616)   11,314  
Total AIG shareholders’ equity 45,351 40,970   65,098  
Non-redeemable noncontrolling interests 5,950 2,484      
Total equity 51,301 43,454 $ 69,034 65,935 67,199
Total liabilities and equity 539,306 522,228   598,841  
Fortitude RE          
Assets:          
Reinsurance assets, net of allowance for credit losses and disputes 30,612 30,751   42,244 36,801
Excluding Fortitude          
Assets:          
Reinsurance assets, net of allowance for credit losses and disputes $ 36,914 38,971   39,432 36,300
As Previously Reported          
Assets:          
Deferred income taxes   15,144   12,624  
Deferred policy acquisition costs   15,518   9,805  
Market risk benefit assets, at fair value   0   0  
Other assets   12,714   13,122  
Total assets   526,634   586,481  
Liabilities:          
Future policy benefits for life and accident and health insurance contracts   59,223   56,878  
Policyholder contract deposits   158,891   154,470  
Market risk benefit liabilities, at fair value   0   0  
Other policyholder funds   3,909   3,548  
Other liabilities(c)   26,456   27,122  
Total liabilities   484,399   519,282  
Additional paid-in capital   80,284      
Retained earnings   33,032   15,504  
Accumulated other comprehensive loss   (22,092)   13,511  
Total AIG shareholders’ equity   40,002   66,362  
Non-redeemable noncontrolling interests   2,233      
Total equity   42,235   67,199  
Total liabilities and equity   526,634   586,481  
As Previously Reported | Fortitude RE          
Assets:          
Reinsurance assets, net of allowance for credit losses and disputes   32,159   34,578 $ 29,135
As Previously Reported | Excluding Fortitude          
Assets:          
Reinsurance assets, net of allowance for credit losses and disputes   39,434   38,963  
Cumulative effect adjustments          
Assets:          
Deferred income taxes   (340)   339  
Deferred policy acquisition costs   (2,661)   3,150  
Market risk benefit assets, at fair value   796   338  
Other assets   (330)   398  
Total assets   (4,406)   12,360  
Liabilities:          
Future policy benefits for life and accident and health insurance contracts   (7,309)   10,486  
Policyholder contract deposits   (2,907)   (6,247)  
Market risk benefit liabilities, at fair value   4,736   8,739  
Other policyholder funds   (446)   248  
Other liabilities(c)   301   398  
Total liabilities   (5,625)   13,624  
Additional paid-in capital   (369)      
Retained earnings   1,861   933  
Accumulated other comprehensive loss   (524)   (2,197)  
Total AIG shareholders’ equity   968   (1,264)  
Non-redeemable noncontrolling interests   251      
Total equity   1,219   (1,264)  
Total liabilities and equity   (4,406)   12,360  
Cumulative effect adjustments | Fortitude RE          
Assets:          
Reinsurance assets, net of allowance for credit losses and disputes   (1,408)   7,666  
Cumulative effect adjustments | Excluding Fortitude          
Assets:          
Reinsurance assets, net of allowance for credit losses and disputes   $ (463)   $ 469  
[1] See Note 10 for details of balances associated with variable interest entities.