Market Risk Benefits (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 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	$ 8,834	$ 8,198	$ 9,722	$ 9,997
Market Risk Benefit, before Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change	6,536	6,508	$ 7,348	$ 8,253
Market Risk Benefit, Decrements	(130)	(114)
Market Risk Benefit, Increase (Decrease) from Future Expected Policyholder Behavior Assumption	(53)	259
Market Risk Benefit, Increase (Decrease) from Actual Policyholder Behavior Different from Expected	67	178
Market Risk Benefit, Increase (Decrease) from Interest Rate Change	(307)	(2,360)
Market Risk Benefit, Increase (Decrease) from Equity Market Change	(1,490)	(669)
Market Risk Benefit, Issuance	3	(9)
Market Risk Benefit, Effect of changes in risk margin	(41)	(52)
Market Risk Benefit, Aging of the Block and Other	1,139	1,022
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, before Tax	2,298	1,690
Market Risk Benefit, Reinsurance Recoverable, after Allowance	32	35
Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change	$ 8,802	$ 8,163
Market Risk Benefit, Weighted-Average Attained Age of Contract holder	73 years 8 months 12 days	72 years 8 months 12 days
Index-linked Annuities
Market Risk Benefit [Line Items]
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk	$ 47	$ (7)