Market Risk Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Variable Annuities
Market Risk Benefit [Line Items]
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk	$ 8,268	$ 8,165	$ 7,250	$ 9,722
Market Risk Benefit, before Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change	6,219	6,008	$ 5,236	$ 7,348
Market Risk Benefit, Decrements	(24)	(30)
Market Risk Benefit, Increase (Decrease) from Actual Policyholder Behavior Different from Expected	(19)	0
Market Risk Benefit, Increase (Decrease) from Interest Rate Change	677	(989)
Market Risk Benefit, Increase (Decrease) from Equity Market Change	87	(630)
Market Risk Benefit, Issuance	1	0
Market Risk Benefit, Effect of changes in risk margin	13	(39)
Market Risk Benefit, Aging of the Block and Other	248	348
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, before Tax	2,049	2,157
Market Risk Benefit, Reinsurance Recoverable, after Allowance	30	27
Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change	$ 8,238	$ 8,138
Market Risk Benefit, Weighted-Average Attained Age of Contract holder	74 years	73 years 2 months 12 days
Index-linked Annuities
Market Risk Benefit [Line Items]
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk	$ 30	$ 8