v3.24.1.u1
Fair Value Measurements - Assets and liabilities measured at fair value on a recurring basis (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Assets:      
Bonds available-for-sale [1] $ 168,826 $ 166,527  
Other bond securities [1] 4,646 4,578  
Equity securities [1] 76 63  
Derivative assets 7,151 5,925  
Counterparty Netting (4,279) (3,646)  
Cash Collateral (2,381) (1,886)  
Total derivative assets 491 393  
Short-term investments [1] 4,144 4,336  
Market risk benefit assets, at fair value 1,172 912  
Separate account assets 95,173 91,005  
Liabilities:      
Policyholder contract deposits 163,783 162,050 $ 158,025
Derivative liabilities 4,603 4,588  
Counterparty Netting (4,279) (3,646)  
Cash Collateral (166) (801)  
Total derivative liabilities 158 141  
Market risk benefit liabilities, at fair value 5,167 5,705  
Private equity funds/hedge funds 7,523 7,690  
Affiliated Entity      
Assets:      
Derivative assets 215 622  
Liabilities:      
Derivative liabilities 0 232  
Fair Value Measured at Net Asset Value Per Share      
Liabilities:      
Private equity funds/hedge funds 5,800 5,800  
U.S. government and government sponsored entities      
Assets:      
Bonds available-for-sale 1,364 1,220  
Obligations of states, municipalities and political subdivisions      
Assets:      
Bonds available-for-sale 5,441 5,831  
Obligations of states, municipalities and political subdivisions | Level 3      
Assets:      
Bonds available-for-sale 806 821  
Non-U.S. governments      
Assets:      
Bonds available-for-sale 3,987 4,057  
Corporate debt      
Assets:      
Bonds available-for-sale 104,171 106,082  
Corporate debt | Level 3      
Assets:      
Bonds available-for-sale 1,581 1,471  
RMBS      
Assets:      
Bonds available-for-sale 15,590 14,277  
RMBS | Affiliated Entity      
Assets:      
Bonds available-for-sale 42 43  
RMBS | Level 3      
Assets:      
Bonds available-for-sale 3,338 3,315  
CMBS      
Assets:      
Bonds available-for-sale 10,302 9,981  
CMBS | Level 3      
Assets:      
Bonds available-for-sale 521 565  
CLO      
Assets:      
Bonds available-for-sale 11,768 11,144  
ABS      
Assets:      
Bonds available-for-sale 16,203 13,935  
Recurring Basis      
Assets:      
Bonds available-for-sale 168,826 166,527  
Other bond securities 4,646 4,578  
Equity securities 76 63  
Other invested assets 1,671 1,850  
Counterparty Netting (4,279) (3,646)  
Cash Collateral (2,381) (1,886)  
Counterparty netting and cash collateral (6,660) (5,532)  
Total derivative assets 491 393  
Short-term investments 1,257 1,408  
Market risk benefit assets, at fair value 1,172 912  
Separate account assets 95,173 91,005  
Total 273,312 266,736  
Liabilities:      
Policyholder contract deposits 8,681 8,050  
Counterparty Netting (4,279) (3,646)  
Cash Collateral (166) (801)  
Counterparty netting and cash collateral (4,445) (4,447)  
Total derivative liabilities 158 141  
Fortitude Re funds withheld payable 2,211 2,182  
Market risk benefit liabilities, at fair value 5,167 5,705  
Total 16,217 16,078  
Recurring Basis | Disposal Group, Held-for-Sale, Not Discontinued Operations      
Assets:      
Total 160 167  
Recurring Basis | Level 1      
Assets:      
Bonds available-for-sale 0 20  
Other bond securities 0 0  
Equity securities 31 21  
Other invested assets 0 0  
Derivative assets 0 7  
Short-term investments 12 21  
Market risk benefit assets, at fair value 0 0  
Separate account assets 91,858 87,813  
Total 91,901 87,882  
Liabilities:      
Policyholder contract deposits 0 0  
Derivative liabilities 0 2  
Fortitude Re funds withheld payable 0 0  
Market risk benefit liabilities, at fair value 0 0  
Total 0 2  
Recurring Basis | Level 2      
Assets:      
Bonds available-for-sale 142,759 143,095  
Other bond securities 3,327 3,255  
Equity securities 0 0  
Other invested assets 0 0  
Derivative assets 5,660 4,633  
Short-term investments 1,245 1,387  
Market risk benefit assets, at fair value 0 0  
Separate account assets 3,315 3,192  
Total 156,306 155,562  
Liabilities:      
Policyholder contract deposits 131 108  
Derivative liabilities 4,548 4,521  
Fortitude Re funds withheld payable 0 0  
Market risk benefit liabilities, at fair value 0 0  
Total 4,679 4,629  
Recurring Basis | Level 3      
Assets:      
Bonds available-for-sale 26,067 23,412  
Other bond securities 1,319 1,323  
Equity securities 45 42  
Other invested assets 1,671 1,850  
Derivative assets 1,491 1,285  
Short-term investments 0 0  
Market risk benefit assets, at fair value 1,172 912 830
Separate account assets 0 0  
Total 31,765 28,824  
Liabilities:      
Policyholder contract deposits 8,550 7,942  
Derivative liabilities 55 65  
Fortitude Re funds withheld payable 2,211 2,182  
Market risk benefit liabilities, at fair value 5,167 5,705 $ 5,100
Total 15,983 15,894  
Recurring Basis | Interest rate contracts      
Assets:      
Derivative assets 3,185 2,947  
Liabilities:      
Derivative liabilities 3,057 3,278  
Recurring Basis | Interest rate contracts | Level 1      
Assets:      
Derivative assets 0 0  
Liabilities:      
Derivative liabilities 0 0  
Recurring Basis | Interest rate contracts | Level 2      
Assets:      
Derivative assets 2,778 2,498  
Liabilities:      
Derivative liabilities 3,057 3,278  
Recurring Basis | Interest rate contracts | Level 3      
Assets:      
Derivative assets 407 449  
Liabilities:      
Derivative liabilities 0 0  
Recurring Basis | Foreign exchange contracts      
Assets:      
Derivative assets 999 940  
Liabilities:      
Derivative liabilities 317 563  
Recurring Basis | Foreign exchange contracts | Level 1      
Assets:      
Derivative assets 0 0  
Liabilities:      
Derivative liabilities 0 0  
Recurring Basis | Foreign exchange contracts | Level 2      
Assets:      
Derivative assets 999 940  
Liabilities:      
Derivative liabilities 317 563  
Recurring Basis | Foreign exchange contracts | Level 3      
Assets:      
Derivative assets 0 0  
Liabilities:      
Derivative liabilities 0 0  
Recurring Basis | Equity contracts      
Assets:      
Derivative assets 2,876 2,017  
Liabilities:      
Derivative liabilities 1,228 745  
Recurring Basis | Equity contracts | Level 1      
Assets:      
Derivative assets 0 7  
Liabilities:      
Derivative liabilities 0 2  
Recurring Basis | Equity contracts | Level 2      
Assets:      
Derivative assets 1,804 1,186  
Liabilities:      
Derivative liabilities 1,174 680  
Recurring Basis | Equity contracts | Level 3      
Assets:      
Derivative assets 1,072 824  
Liabilities:      
Derivative liabilities 54 63  
Recurring Basis | Credit contracts      
Assets:      
Derivative assets 78 8  
Liabilities:      
Derivative liabilities 0    
Recurring Basis | Credit contracts | Level 1      
Assets:      
Derivative assets 0 0  
Liabilities:      
Derivative liabilities 0    
Recurring Basis | Credit contracts | Level 2      
Assets:      
Derivative assets 78 8  
Liabilities:      
Derivative liabilities 0    
Recurring Basis | Credit contracts | Level 3      
Assets:      
Derivative assets 0 0  
Liabilities:      
Derivative liabilities 0    
Recurring Basis | Other contracts      
Assets:      
Derivative assets 13 13  
Liabilities:      
Derivative liabilities 1 2  
Recurring Basis | Other contracts | Level 1      
Assets:      
Derivative assets 0 0  
Liabilities:      
Derivative liabilities 0 0  
Recurring Basis | Other contracts | Level 2      
Assets:      
Derivative assets 1 1  
Liabilities:      
Derivative liabilities 0 0  
Recurring Basis | Other contracts | Level 3      
Assets:      
Derivative assets 12 12  
Liabilities:      
Derivative liabilities 1 2  
Recurring Basis | U.S. government and government sponsored entities      
Assets:      
Bonds available-for-sale 1,364 1,220  
Other bond securities 0    
Recurring Basis | U.S. government and government sponsored entities | Level 1      
Assets:      
Bonds available-for-sale 0 20  
Other bond securities 0    
Recurring Basis | U.S. government and government sponsored entities | Level 2      
Assets:      
Bonds available-for-sale 1,364 1,200  
Other bond securities 0    
Recurring Basis | U.S. government and government sponsored entities | Level 3      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities 0    
Recurring Basis | Obligations of states, municipalities and political subdivisions      
Assets:      
Bonds available-for-sale 5,441 5,831  
Other bond securities 39 40  
Recurring Basis | Obligations of states, municipalities and political subdivisions | Level 1      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities 0 0  
Recurring Basis | Obligations of states, municipalities and political subdivisions | Level 2      
Assets:      
Bonds available-for-sale 4,612 4,987  
Other bond securities 38 39  
Recurring Basis | Obligations of states, municipalities and political subdivisions | Level 3      
Assets:      
Bonds available-for-sale 829 844  
Other bond securities 1 1  
Recurring Basis | Non-U.S. governments      
Assets:      
Bonds available-for-sale 3,987 4,057  
Other bond securities 13 13  
Recurring Basis | Non-U.S. governments | Level 1      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities 0 0  
Recurring Basis | Non-U.S. governments | Level 2      
Assets:      
Bonds available-for-sale 3,987 4,057  
Other bond securities 13 13  
Recurring Basis | Non-U.S. governments | Level 3      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities 0 0  
Recurring Basis | Corporate debt      
Assets:      
Bonds available-for-sale 104,171 106,082  
Other bond securities 2,704 2,653  
Recurring Basis | Corporate debt | Level 1      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities 0 0  
Recurring Basis | Corporate debt | Level 2      
Assets:      
Bonds available-for-sale 102,596 104,725  
Other bond securities 2,527 2,486  
Recurring Basis | Corporate debt | Level 3      
Assets:      
Bonds available-for-sale 1,575 1,357  
Other bond securities 177 167  
Recurring Basis | RMBS      
Assets:      
Bonds available-for-sale 15,590 14,277  
Other bond securities 169 170  
Recurring Basis | RMBS | Level 1      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities 0 0  
Recurring Basis | RMBS | Level 2      
Assets:      
Bonds available-for-sale 9,236 8,423  
Other bond securities 63 63  
Recurring Basis | RMBS | Level 2 | Affiliated Entity      
Assets:      
Bonds available-for-sale 35 36  
Recurring Basis | RMBS | Level 2 | Affiliated Entity | Maximum      
Assets:      
Other bond securities 1 1  
Recurring Basis | RMBS | Level 3      
Assets:      
Bonds available-for-sale 6,354 5,854  
Other bond securities 106 107  
Recurring Basis | RMBS | Level 3 | Affiliated Entity      
Assets:      
Bonds available-for-sale 7 7  
Recurring Basis | CMBS      
Assets:      
Bonds available-for-sale 10,302 9,981  
Other bond securities 240 228  
Recurring Basis | CMBS | Level 1      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities 0 0  
Recurring Basis | CMBS | Level 2      
Assets:      
Bonds available-for-sale 9,755 9,373  
Other bond securities 223 211  
Recurring Basis | CMBS | Level 3      
Assets:      
Bonds available-for-sale 547 608  
Other bond securities 17 17  
Recurring Basis | CLO      
Assets:      
Bonds available-for-sale 11,768 11,144  
Other bond securities 446 423  
Recurring Basis | CLO | Level 1      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities 0 0  
Recurring Basis | CLO | Level 2      
Assets:      
Bonds available-for-sale 10,039 9,301  
Other bond securities 375 354  
Recurring Basis | CLO | Level 3      
Assets:      
Bonds available-for-sale 1,729 1,843  
Other bond securities 71 69  
Recurring Basis | ABS      
Assets:      
Bonds available-for-sale 16,203 13,935  
Other bond securities 1,035 1,051  
Recurring Basis | ABS | Level 1      
Assets:      
Bonds available-for-sale 0 0  
Other bond securities 0 0  
Recurring Basis | ABS | Level 2      
Assets:      
Bonds available-for-sale 1,170 1,029  
Other bond securities 88 89  
Recurring Basis | ABS | Level 3      
Assets:      
Bonds available-for-sale 15,033 12,906  
Other bond securities $ 947 $ 962  
[1] See Note 9 for details of balances associated with variable interest entities