Market Risk Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Variable Annuities
Market Risk Benefit [Line Items]
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk	$ 8,165	$ 10,308	$ 9,722	$ 9,997
Market Risk Benefit, before Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change	6,008	8,557	$ 7,348	$ 8,253
Market Risk Benefit, Decrements	(30)	(27)
Market Risk Benefit, Increase (Decrease) from Actual Policyholder Behavior Different from Expected	0	122
Market Risk Benefit, Increase (Decrease) from Interest Rate Change	(989)	880
Market Risk Benefit, Increase (Decrease) from Equity Market Change	(630)	(1,001)
Market Risk Benefit, Issuance	0	(3)
Market Risk Benefit, Effect of changes in risk margin	(39)	9
Market Risk Benefit, Aging of the Block and Other	348	324
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, before Tax	2,157	1,751
Market Risk Benefit, Reinsurance Recoverable, after Allowance	27	70
Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change	$ 8,138	$ 10,238
Market Risk Benefit, Weighted-Average Attained Age of Contract holder	73 years 2 months 12 days	72 years 2 months 12 days
Index-linked Annuities
Market Risk Benefit [Line Items]
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk	$ 8	$ 3