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Income Tax (Total Income Taxes Provided) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Effects Allocated Directly to Equity [Abstract]
Provision for income taxes	$ 204	$ 74	$ 138
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	(2,495)	(520)	611
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	21	23	(9)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax	7	7	(1)
Income Tax Expense (Benefit), Intraperiod Tax Allocation	$ (2,263)	$ (416)	$ 739

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- Definition

Amount of tax expense (benefit) before reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities, including change in unrealized other-than-temporary impairments on fixed maturity securities.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of income tax expense (benefit) for continuing operations, discontinued operations, other comprehensive income, and items charged (credited) directly to shareholders' equity.

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Amount of tax expense (benefit), after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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