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Income Tax (Total Income Taxes Provided) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Provision for income taxes |  | $ 251 | $ 197 | $ 215
Other Comprehensive Income (Loss), Tax |  | (305) | 271 | (69)
Income Tax Expense (Benefit), Intraperiod Tax Allocation |  | 556 | (74) | 284
Accumulated Net Unrealized Investment Gain (Loss) [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other Comprehensive Income (Loss), Tax | [1] | 449 | 2,542 | 530
AOCI, Liability for Future Policy Benefit, Parent |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other Comprehensive Income (Loss), Tax |  | (161) | 2,224 | 580
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, Parent |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other Comprehensive Income (Loss), Tax |  | 3 | (5) | 11
Accumulated Translation Adjustment [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other Comprehensive Income (Loss), Tax |  | (22) | 35 | (23)
Accumulated Defined Benefit Plans Adjustment [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other Comprehensive Income (Loss), Tax |  | $ 2 | $ (7) | $ (7)
[1] | Includes cash flow hedges of $(218), $(205) and $(22) as of December 31, 2023, 2022 and 2021, respectively. See Note 12 for additional information on cash flow hedges.

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