v3.26.1
Fair Value Measurements - Assets and liabilities measured at fair value on a recurring basis (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Assets:      
Bonds available-for-sale [1] $ 187,673 $ 189,381  
Other bond securities, at fair value [1] 5,386 5,407  
Equity securities [1] 1,157 79  
Derivative assets 8,332 10,029  
Counterparty Netting (4,717) (6,106)  
Cash Collateral (2,697) (3,482)  
Total derivative assets 918 441  
Short-term investments [1] 4,728 5,675  
Market risk benefit assets, at fair value 2,628 2,392  
Separate account assets 90,520 95,585  
Liabilities:      
Policyholder contract deposit 190,076 188,876 $ 176,312
Derivative liabilities 5,501 7,091  
Counterparty Netting (4,717) (6,106)  
Cash Collateral (599) (686)  
Total derivative liabilities 185 299  
Market risk benefit liabilities 7,333 7,309  
Private equity funds/hedge funds 8,197 8,123  
Private equity funds      
Liabilities:      
Private equity funds/hedge funds 6,600 6,500  
Hedge funds      
Liabilities:      
Private equity funds/hedge funds 108 121  
Recurring Basis      
Assets:      
Bonds available-for-sale 187,673 189,381  
Other bond securities, at fair value 5,386 5,407  
Equity securities 1,157 79  
Other invested assets 1,477 1,498  
Counterparty Netting (4,717) (6,106)  
Cash Collateral (2,697) (3,482)  
Counterparty netting and cash collateral (7,414) (9,588)  
Total derivative assets 918 441  
Short-term investments 1,714 1,624  
Market risk benefit assets, at fair value 2,628 2,392  
Separate account assets 90,520 95,585  
Total 291,473 296,407  
Liabilities:      
Policyholder contract deposit 11,717 12,156  
Counterparty Netting (4,717) (6,106)  
Cash Collateral (599) (686)  
Counterparty netting and cash collateral (5,316) (6,792)  
Total derivative liabilities 185 299  
Fortitude Re funds withheld payable 3,663 3,795  
Other liabilities (60)    
Other liabilities   23  
Market risk benefit liabilities 7,333 7,309  
Total 22,838 23,582  
Level 1 | Recurring Basis      
Assets:      
Bonds available-for-sale 0 10  
Other bond securities, at fair value 0 0  
Equity securities 1,108 10  
Other invested assets 0 0  
Derivative assets 43 6  
Short-term investments 903 661  
Market risk benefit assets, at fair value 0 0  
Separate account assets 86,479 91,582  
Total 88,533 92,269  
Liabilities:      
Policyholder contract deposit 0 0  
Derivative liabilities 2 7  
Fortitude Re funds withheld payable 0 0  
Other liabilities 0    
Other liabilities   0  
Market risk benefit liabilities 0 0  
Total 2 7  
Level 2 | Recurring Basis      
Assets:      
Bonds available-for-sale 158,242 158,838  
Other bond securities, at fair value 3,940 3,867  
Equity securities 0 0  
Other invested assets 0 0  
Derivative assets 7,659 9,124  
Short-term investments 811 963  
Market risk benefit assets, at fair value 0 0  
Separate account assets 4,041 4,003  
Total 174,693 176,795  
Liabilities:      
Policyholder contract deposit 144 134  
Derivative liabilities 5,451 6,960  
Fortitude Re funds withheld payable 0 0  
Other liabilities (60)    
Other liabilities   23  
Market risk benefit liabilities 0 0  
Total 5,535 7,117  
Level 3      
Assets:      
Market risk benefit assets, at fair value 2,628 2,392 1,200
Liabilities:      
Market risk benefit liabilities 7,300   $ 6,300
Level 3 | Recurring Basis      
Assets:      
Bonds available-for-sale 29,431 30,533  
Other bond securities, at fair value 1,446 1,540  
Equity securities 49 69  
Other invested assets 1,477 1,498  
Derivative assets 630 899  
Short-term investments 0 0  
Market risk benefit assets, at fair value 2,628 2,392  
Separate account assets 0 0  
Total 35,661 36,931  
Liabilities:      
Policyholder contract deposit 11,573 12,022  
Derivative liabilities 48 124  
Fortitude Re funds withheld payable 3,663 3,795  
Other liabilities 0    
Other liabilities   0  
Market risk benefit liabilities 7,333 7,309  
Total 22,617 23,250  
Interest rate contracts | Recurring Basis      
Assets:      
Derivative assets 849 916  
Liabilities:      
Derivative liabilities 1,661 1,633  
Interest rate contracts | Level 1 | Recurring Basis      
Assets:      
Derivative assets 0 0  
Liabilities:      
Derivative liabilities 0 0  
Interest rate contracts | Level 2 | Recurring Basis      
Assets:      
Derivative assets 827 894  
Liabilities:      
Derivative liabilities 1,639 1,611  
Interest rate contracts | Level 3 | Recurring Basis      
Assets:      
Derivative assets 22 22  
Liabilities:      
Derivative liabilities 22 22  
Foreign exchange contracts | Recurring Basis      
Assets:      
Derivative assets 950 711  
Liabilities:      
Derivative liabilities 435 554  
Foreign exchange contracts | Level 1 | Recurring Basis      
Assets:      
Derivative assets 0 0  
Liabilities:      
Derivative liabilities 0 0  
Foreign exchange contracts | Level 2 | Recurring Basis      
Assets:      
Derivative assets 950 711  
Liabilities:      
Derivative liabilities 435 554  
Foreign exchange contracts | Level 3 | Recurring Basis      
Assets:      
Derivative assets 0 0  
Liabilities:      
Derivative liabilities 0 0  
Equity contracts | Recurring Basis      
Assets:      
Derivative assets 6,330 8,388  
Liabilities:      
Derivative liabilities 3,403 4,900  
Equity contracts | Level 1 | Recurring Basis      
Assets:      
Derivative assets 43 6  
Liabilities:      
Derivative liabilities 2 7  
Equity contracts | Level 2 | Recurring Basis      
Assets:      
Derivative assets 5,697 7,519  
Liabilities:      
Derivative liabilities 3,377 4,795  
Equity contracts | Level 3 | Recurring Basis      
Assets:      
Derivative assets 590 863  
Liabilities:      
Derivative liabilities 24 98  
Credit contracts | Recurring Basis      
Assets:      
Derivative assets 185    
Credit contracts | Level 1 | Recurring Basis      
Assets:      
Derivative assets 0    
Credit contracts | Level 2 | Recurring Basis      
Assets:      
Derivative assets 185    
Credit contracts | Level 3 | Recurring Basis      
Assets:      
Derivative assets 0    
Other contracts | Recurring Basis      
Assets:      
Derivative assets 18 14  
Liabilities:      
Derivative liabilities 2 4  
Other contracts | Level 1 | Recurring Basis      
Assets:      
Derivative assets 0 0  
Liabilities:      
Derivative liabilities 0 0  
Other contracts | Level 2 | Recurring Basis      
Assets:      
Derivative assets 0 0  
Liabilities:      
Derivative liabilities 0 0  
Other contracts | Level 3 | Recurring Basis      
Assets:      
Derivative assets 18 14  
Liabilities:      
Derivative liabilities 2 4  
U.S. government and government sponsored entities      
Assets:      
Bonds available-for-sale 1,327 1,337  
U.S. government and government sponsored entities | Recurring Basis      
Assets:      
Bonds available-for-sale 1,327 1,337  
Other bond securities, at fair value 191 192  
U.S. government and government sponsored entities | Level 1 | Recurring Basis      
Assets:      
Bonds available-for-sale 0 10  
Other bond securities, at fair value 0 0  
U.S. government and government sponsored entities | Level 2 | Recurring Basis      
Assets:      
Bonds available-for-sale 1,327 1,327  
Other bond securities, at fair value 191 192  
U.S. government and government sponsored entities | Level 3 | Recurring Basis      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities, at fair value 0 0  
Obligations of states, municipalities and political subdivisions      
Assets:      
Bonds available-for-sale 4,169 4,486  
Obligations of states, municipalities and political subdivisions | Recurring Basis      
Assets:      
Bonds available-for-sale 4,169 4,486  
Other bond securities, at fair value 34 34  
Obligations of states, municipalities and political subdivisions | Level 1 | Recurring Basis      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities, at fair value 0 0  
Obligations of states, municipalities and political subdivisions | Level 2 | Recurring Basis      
Assets:      
Bonds available-for-sale 3,424 3,725  
Other bond securities, at fair value 33 33  
Obligations of states, municipalities and political subdivisions | Level 3      
Assets:      
Bonds available-for-sale 720 723  
Obligations of states, municipalities and political subdivisions | Level 3 | Recurring Basis      
Assets:      
Bonds available-for-sale 745 761  
Other bond securities, at fair value 1 1  
Non-U.S. governments      
Assets:      
Bonds available-for-sale 4,125 4,487  
Non-U.S. governments | Recurring Basis      
Assets:      
Bonds available-for-sale 4,125 4,487  
Other bond securities, at fair value 72 75  
Non-U.S. governments | Level 1 | Recurring Basis      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities, at fair value 0 0  
Non-U.S. governments | Level 2 | Recurring Basis      
Assets:      
Bonds available-for-sale 4,125 4,487  
Other bond securities, at fair value 72 75  
Non-U.S. governments | Level 3 | Recurring Basis      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities, at fair value 0 0  
Corporate debt      
Assets:      
Bonds available-for-sale 121,198 122,071  
Corporate debt | Recurring Basis      
Assets:      
Bonds available-for-sale 121,198 122,071  
Other bond securities, at fair value 2,966 2,914  
Corporate debt | Level 1 | Recurring Basis      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities, at fair value 0 0  
Corporate debt | Level 2 | Recurring Basis      
Assets:      
Bonds available-for-sale 120,499 121,390  
Other bond securities, at fair value 2,759 2,709  
Corporate debt | Level 3      
Assets:      
Bonds available-for-sale 808 701  
Corporate debt | Level 3 | Recurring Basis      
Assets:      
Bonds available-for-sale 699 681  
Other bond securities, at fair value 207 205  
RMBS      
Assets:      
Bonds available-for-sale 16,744 16,350  
RMBS | Recurring Basis      
Assets:      
Bonds available-for-sale 16,744 16,350  
Other bond securities, at fair value 134 137  
RMBS | Level 1 | Recurring Basis      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities, at fair value 0 0  
RMBS | Level 2 | Recurring Basis      
Assets:      
Bonds available-for-sale 11,577 10,495  
Other bond securities, at fair value 68 50  
RMBS | Level 3      
Assets:      
Bonds available-for-sale 2,204 2,847  
RMBS | Level 3 | Recurring Basis      
Assets:      
Bonds available-for-sale 5,167 5,855  
Other bond securities, at fair value 66 87  
CMBS      
Assets:      
Bonds available-for-sale 9,492 9,307  
CMBS | Recurring Basis      
Assets:      
Bonds available-for-sale 9,492 9,307  
Other bond securities, at fair value 203 217  
CMBS | Level 1 | Recurring Basis      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities, at fair value 0 0  
CMBS | Level 2 | Recurring Basis      
Assets:      
Bonds available-for-sale 8,776 8,563  
Other bond securities, at fair value 196 201  
CMBS | Level 3      
Assets:      
Bonds available-for-sale 700 696  
CMBS | Level 3 | Recurring Basis      
Assets:      
Bonds available-for-sale 716 744  
Other bond securities, at fair value 7 16  
CLO      
Assets:      
Bonds available-for-sale 8,755 9,092  
CLO | Recurring Basis      
Assets:      
Bonds available-for-sale 8,755 9,092  
Other bond securities, at fair value 591 585  
CLO | Level 1 | Recurring Basis      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities, at fair value 0 0  
CLO | Level 2 | Recurring Basis      
Assets:      
Bonds available-for-sale 6,757 7,037  
Other bond securities, at fair value 558 542  
CLO | Level 3 | Recurring Basis      
Assets:      
Bonds available-for-sale 1,998 2,055  
Other bond securities, at fair value 33 43  
ABS      
Assets:      
Bonds available-for-sale 21,863 22,251  
ABS | Recurring Basis      
Assets:      
Bonds available-for-sale 21,863 22,251  
Other bond securities, at fair value 1,195 1,253  
ABS | Level 1 | Recurring Basis      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities, at fair value 0 0  
ABS | Level 2 | Recurring Basis      
Assets:      
Bonds available-for-sale 1,757 1,814  
Other bond securities, at fair value 63 65  
ABS | Level 3 | Recurring Basis      
Assets:      
Bonds available-for-sale 20,106 20,437  
Other bond securities, at fair value $ 1,132 $ 1,188  
[1] See Note 8 for details of balances associated with variable interest entities