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Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Tax provision at U.S. federal statutory rate	$ 808	$ 648	$ 474
Nontaxable net investment income	(40)	(41)	(29)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	30	23	2
Total income tax expense (benefit)	$ 738	$ 584	$ 443

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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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