v3.24.2.u1
Deferred Policy Acquisition Costs - Rollforward of LDTI and VOBA (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]      
Deferred policy acquisition costs and value of business acquired $ 10,133 $ 10,715 $ 10,011
Disposal Group, Held-for-Sale, Not Discontinued Operations | AIG Life U.K.      
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]      
Deferred policy acquisition costs held for sale     740
Value of business acquired held for sale     $ 74
Long-Duration Insurance Contracts      
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]      
Balance, beginning of year 9,994 10,472  
Capitalization 684 626  
Amortization expense (526) (508)  
Other, including foreign exchange (7) 33  
Dispositions (27)    
Balance, end of year 10,118 10,623  
Long-Duration Insurance Contracts | Individual Retirement      
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]      
Balance, beginning of year 4,777 4,643  
Capitalization 395 358  
Amortization expense (301) (274)  
Other, including foreign exchange 0 0  
Dispositions 0    
Balance, end of year 4,871 4,727  
Long-Duration Insurance Contracts | Group Retirement      
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]      
Balance, beginning of year 1,055 1,060  
Capitalization 41 37  
Amortization expense (42) (41)  
Other, including foreign exchange 0 0  
Dispositions 0    
Balance, end of year 1,054 1,056  
Long-Duration Insurance Contracts | Life Insurance      
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]      
Balance, beginning of year 4,092 4,718  
Capitalization 226 221  
Amortization expense (177) (189)  
Other, including foreign exchange (7) 33  
Dispositions (27)    
Balance, end of year 4,107 4,783  
Long-Duration Insurance Contracts | Institutional Markets      
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]      
Balance, beginning of year 70 51  
Capitalization 22 10  
Amortization expense (6) (4)  
Other, including foreign exchange 0 0  
Dispositions 0    
Balance, end of year 86 57  
Value Of Business Acquired      
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]      
Balance, beginning of year 17 91  
Amortization expense (1) (6)  
Other, including foreign exchange (1) 7  
Balance, end of year 15 92  
Value Of Business Acquired | Individual Retirement      
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]      
Balance, beginning of year 2 3  
Amortization expense 0 (1)  
Other, including foreign exchange 0 0  
Balance, end of year 2 2  
Value Of Business Acquired | Group Retirement      
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]      
Balance, beginning of year 1 1  
Amortization expense 0 0  
Other, including foreign exchange 0 (1)  
Balance, end of year 1 0  
Value Of Business Acquired | Life Insurance      
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]      
Balance, beginning of year 14 87  
Amortization expense (1) (5)  
Other, including foreign exchange (1) 8  
Balance, end of year 12 90  
Value Of Business Acquired | Institutional Markets      
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]      
Balance, beginning of year 0 0  
Amortization expense 0 0  
Other, including foreign exchange 0 0  
Balance, end of year $ 0 $ 0