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Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Changes in Accumulated Other Comprehensive Income (Loss) by Component |  |  |  |  |
Beginning of year balance | $ 71,769 | $ 74,841 | $ 69,701 |  |
Other comprehensive income (loss) | 967 | (1,598) | (314) |  |
End of year balance | 76,636 | 71,769 | 74,841 |  |
Adoption of new accounting standard, adjustment |  |  |  |  |
Changes in Accumulated Other Comprehensive Income (Loss) by Component |  |  |  |  |
Beginning of year balance | 454 |  | (766) | [1] |
End of year balance |  | 454 |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest |  |  |  |  |
Changes in Accumulated Other Comprehensive Income (Loss) by Component |  |  |  |  |
Beginning of year balance | (1,264) | 334 | 1,414 |  |
End of year balance | (297) | (1,264) | 334 |  |
AOCI Including Portion Attributable to Noncontrolling Interest | Adoption of new accounting standard, adjustment |  |  |  |  |
Changes in Accumulated Other Comprehensive Income (Loss) by Component |  |  |  |  |
Beginning of year balance | 0 | 0 | (766) |  |
End of year balance |  | 0 | 0 |  |
Net unrealized investment gains (losses) |  |  |  |  |
Changes in Accumulated Other Comprehensive Income (Loss) by Component |  |  |  |  |
Beginning of year balance | (1,519) | 798 | 1,214 |  |
Other comprehensive income (loss) before reclassifications, net of tax | 603 | (2,556) | (530) |  |
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 487 | 239 | (26) |  |
Other comprehensive income (loss) | 1,090 | (2,317) | (556) |  |
End of year balance | (429) | (1,519) | 798 |  |
Other comprehensive income (loss) before reclassifications, pre-tax | 612 | (3,021) | (644) |  |
Amounts reclassified from accumulated other comprehensive income (loss), pre-tax | 566 | 315 | (32) |  |
Net unrealized investment gains (losses) | Adoption of new accounting standard, adjustment |  |  |  |  |
Changes in Accumulated Other Comprehensive Income (Loss) by Component |  |  |  |  |
Beginning of year balance | 0 | 0 | 140 |  |
End of year balance |  | 0 | 0 |  |
Adoption of new accounting standard, pre-tax |  | 0 | 0 |  | $ 181
Change in discount rate on long-duration insurance reserves |  |  |  |  |
Changes in Accumulated Other Comprehensive Income (Loss) by Component |  |  |  |  |
Beginning of year balance | 219 | (651) | 0 |  |
Other comprehensive income (loss) before reclassifications, net of tax | (67) | 870 | 255 |  |
Other comprehensive income (loss) | (67) | 870 | 255 |  |
End of year balance | 152 | 219 | (651) |  |
Other comprehensive income (loss) before reclassifications, pre-tax | (92) | 1,126 | 328 |  |
Change in discount rate on long-duration insurance reserves | Adoption of new accounting standard, adjustment |  |  |  |  |
Changes in Accumulated Other Comprehensive Income (Loss) by Component |  |  |  |  |
Beginning of year balance | 0 | 0 | (906) |  |
End of year balance |  | 0 | 0 |  |
Adoption of new accounting standard, pre-tax |  | 0 | 0 |  | $ (1,166)
Foreign currency translation adjustments |  |  |  |  |
Changes in Accumulated Other Comprehensive Income (Loss) by Component |  |  |  |  |
Beginning of year balance | 0 | 0 | 7 |  |
Other comprehensive income (loss) before reclassifications, net of tax | 0 | 0 | (7) |  |
Other comprehensive income (loss) | 0 | 0 | (7) |  |
End of year balance | 0 | 0 | 0 |  |
Net cash flow hedges |  |  |  |  |
Changes in Accumulated Other Comprehensive Income (Loss) by Component |  |  |  |  |
Beginning of year balance | 239 | 222 | 248 |  |
Other comprehensive income (loss) before reclassifications, net of tax | 19 | 28 | 0 |  |
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | (14) | (11) | (26) |  |
Other comprehensive income (loss) | 5 | 17 | (26) |  |
End of year balance | 244 | 239 | 222 |  |
Other comprehensive income (loss) before reclassifications, pre-tax | 25 | 38 | 0 |  |
Amounts reclassified from accumulated other comprehensive income (loss), pre-tax | (19) | (15) | (34) |  |
Amount expected to be reclassified | 15 |  |  |  |
Pension and other postretirement benefits |  |  |  |  |
Changes in Accumulated Other Comprehensive Income (Loss) by Component |  |  |  |  |
Beginning of year balance | (203) | (35) | (55) |  |
Other comprehensive income (loss) before reclassifications, net of tax | (61) | (170) | 15 |  |
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 0 | 2 | 5 |  |
Other comprehensive income (loss) | (61) | (168) | 20 |  |
End of year balance | (264) | (203) | (35) |  |
Other comprehensive income (loss) before reclassifications, pre-tax | (81) | (229) | 20 |  |
Amounts reclassified from accumulated other comprehensive income (loss), pre-tax | $ 0 | $ 3 | $ 6 |  |
[1] | Reflects the adoption of Accounting Standards Update (“ASU”) 2018-12, Targeted Improvements to the Accounting for Long-Duration Contracts (Topic 944) during the year ended December 31, 2021. See Note 1 ‘‘Significant Accounting Policies’’ for additional information.

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