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Fair Value (Recurring Fair Value Measurements) (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | $ 80,474 | $ 80,991
Equity securities | 86 | 102
Short-term investments | 1,347 | 1,169
Derivative assets | 3,845 | 3,714
Market risk benefit assets | 839 | 656
Separate account assets | 90,332 | 88,271
Liabilities [Abstract] |  |
Market risk benefit liabilities | 8,964 | 10,323
Derivative liabilities | 5,373 | 5,088
Recurring |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 80,474 | 80,991
Equity securities | 86 | 102
Short-term investments | 1,347 | 1,169
Derivative assets | 3,845 | 3,714
Embedded derivatives on index-linked annuities | 22 | 0
Market risk benefit assets | 839 | 656
Separate account assets | 90,332 | 88,271
Total assets | 176,945 | 174,903
Liabilities [Abstract] |  |
Market risk benefit liabilities | 8,964 | 10,323
Derivative liabilities | 5,373 | 5,088
Embedded derivatives on index-linked annuities (2) | 9,963 | 8,186
Total liabilities | 24,300 | 23,597
Recurring | Interest rate |  |
Assets [Abstract] |  |
Derivative assets | 259 | 245
Liabilities [Abstract] |  |
Derivative liabilities | 2,738 | 2,209
Recurring | Foreign currency exchange rate |  |
Assets [Abstract] |  |
Derivative assets | 484 | 449
Liabilities [Abstract] |  |
Derivative liabilities | 31 | 55
Recurring | Credit |  |
Assets [Abstract] |  |
Derivative assets | 29 | 27
Liabilities [Abstract] |  |
Derivative liabilities | 1 | 0
Recurring | Equity market |  |
Assets [Abstract] |  |
Derivative assets | 3,073 | 2,993
Liabilities [Abstract] |  |
Derivative liabilities | 2,603 | 2,824
Recurring | U.S. corporate |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 35,937 | 35,755
Recurring | Foreign corporate |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 11,759 | 11,665
Recurring | U.S. government and agency |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 7,633 | 8,419
Recurring | RMBS |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 7,462 | 7,430
Recurring | CMBS |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 6,454 | 6,410
Recurring | ABS |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 6,465 | 6,406
Recurring | State and political subdivision |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 3,761 | 3,874
Recurring | Foreign government |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 1,003 | 1,032
Recurring | Level 1 |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 3,167 | 3,786
Equity securities | 51 | 55
Short-term investments | 709 | 614
Derivative assets | 0 | 0
Embedded derivatives on index-linked annuities | 0 | 0
Market risk benefit assets | 0 | 0
Separate account assets | 14 | 20
Total assets | 3,941 | 4,475
Liabilities [Abstract] |  |
Market risk benefit liabilities | 0 | 0
Derivative liabilities | 0 | 0
Embedded derivatives on index-linked annuities (2) | 0 | 0
Total liabilities | 0 | 0
Recurring | Level 1 | Interest rate |  |
Assets [Abstract] |  |
Derivative assets | 0 | 0
Liabilities [Abstract] |  |
Derivative liabilities | 0 | 0
Recurring | Level 1 | Foreign currency exchange rate |  |
Assets [Abstract] |  |
Derivative assets | 0 | 0
Liabilities [Abstract] |  |
Derivative liabilities | 0 | 0
Recurring | Level 1 | Credit |  |
Assets [Abstract] |  |
Derivative assets | 0 | 0
Liabilities [Abstract] |  |
Derivative liabilities | 0 | 0
Recurring | Level 1 | Equity market |  |
Assets [Abstract] |  |
Derivative assets | 0 | 0
Liabilities [Abstract] |  |
Derivative liabilities | 0 | 0
Recurring | Level 1 | U.S. corporate |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 0 | 0
Recurring | Level 1 | Foreign corporate |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 0 | 0
Recurring | Level 1 | U.S. government and agency |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 3,167 | 3,786
Recurring | Level 1 | RMBS |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 0 | 0
Recurring | Level 1 | CMBS |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 0 | 0
Recurring | Level 1 | ABS |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 0 | 0
Recurring | Level 1 | State and political subdivision |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 0 | 0
Recurring | Level 1 | Foreign government |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 0 | 0
Recurring | Level 2 |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 75,537 | 75,469
Equity securities | 10 | 22
Short-term investments | 638 | 555
Derivative assets | 3,834 | 3,696
Embedded derivatives on index-linked annuities | 0 | 0
Market risk benefit assets | 0 | 0
Separate account assets | 90,318 | 88,251
Total assets | 170,337 | 167,993
Liabilities [Abstract] |  |
Market risk benefit liabilities | 0 | 0
Derivative liabilities | 5,373 | 5,088
Embedded derivatives on index-linked annuities (2) | 0 | 0
Total liabilities | 5,373 | 5,088
Recurring | Level 2 | Interest rate |  |
Assets [Abstract] |  |
Derivative assets | 259 | 245
Liabilities [Abstract] |  |
Derivative liabilities | 2,738 | 2,209
Recurring | Level 2 | Foreign currency exchange rate |  |
Assets [Abstract] |  |
Derivative assets | 478 | 437
Liabilities [Abstract] |  |
Derivative liabilities | 31 | 55
Recurring | Level 2 | Credit |  |
Assets [Abstract] |  |
Derivative assets | 24 | 21
Liabilities [Abstract] |  |
Derivative liabilities | 1 | 0
Recurring | Level 2 | Equity market |  |
Assets [Abstract] |  |
Derivative assets | 3,073 | 2,993
Liabilities [Abstract] |  |
Derivative liabilities | 2,603 | 2,824
Recurring | Level 2 | U.S. corporate |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 34,995 | 34,760
Recurring | Level 2 | Foreign corporate |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 11,434 | 11,340
Recurring | Level 2 | U.S. government and agency |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 4,466 | 4,633
Recurring | Level 2 | RMBS |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 7,442 | 7,415
Recurring | Level 2 | CMBS |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 6,411 | 6,371
Recurring | Level 2 | ABS |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 6,046 | 6,080
Recurring | Level 2 | State and political subdivision |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 3,761 | 3,874
Recurring | Level 2 | Foreign government |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 982 | 996
Recurring | Level 3 |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 1,770 | 1,736
Equity securities | 25 | 25
Short-term investments | 0 | 0
Derivative assets | 11 | 18
Embedded derivatives on index-linked annuities | 22 | 0
Market risk benefit assets | 839 | 656
Separate account assets | 0 | 0
Total assets | 2,667 | 2,435
Liabilities [Abstract] |  |
Market risk benefit liabilities | 8,964 | 10,323
Derivative liabilities | 0 | 0
Embedded derivatives on index-linked annuities (2) | 9,963 | 8,186
Total liabilities | 18,927 | 18,509
Recurring | Level 3 | Interest rate |  |
Assets [Abstract] |  |
Derivative assets | 0 | 0
Liabilities [Abstract] |  |
Derivative liabilities | 0 | 0
Recurring | Level 3 | Foreign currency exchange rate |  |
Assets [Abstract] |  |
Derivative assets | 6 | 12
Liabilities [Abstract] |  |
Derivative liabilities | 0 | 0
Recurring | Level 3 | Credit |  |
Assets [Abstract] |  |
Derivative assets | 5 | 6
Liabilities [Abstract] |  |
Derivative liabilities | 0 | 0
Recurring | Level 3 | Equity market |  |
Assets [Abstract] |  |
Derivative assets | 0 | 0
Liabilities [Abstract] |  |
Derivative liabilities | 0 | 0
Recurring | Level 3 | U.S. corporate |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 942 | 995
Recurring | Level 3 | Foreign corporate |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 325 | 325
Recurring | Level 3 | U.S. government and agency |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 0 | 0
Recurring | Level 3 | RMBS |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 20 | 15
Recurring | Level 3 | CMBS |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 43 | 39
Recurring | Level 3 | ABS |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 419 | 326
Recurring | Level 3 | State and political subdivision |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | 0 | 0
Recurring | Level 3 | Foreign government |  |
Assets [Abstract] |  |
Fixed maturity securities, estimated fair value | $ 21 | $ 36

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Data Type: | na
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