Market Risk Benefits (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Variable Annuities
Market Risk Benefit [Roll Forward]
Balance, beginning of period	$ 7,250	$ 9,722
Balance, beginning of period, before effect of changes in nonperformance risk	5,236	7,348
Decrements	(124)	(130)
Effect of changes in future expected assumptions	540	(53)
Effect of actual different from expected experience	73	67
Effect of changes in interest rates	532	(307)
Effect of changes in fund returns	(1,475)	(1,490)
Issuances	0	3
Effect of changes in risk margin	(61)	(41)
Aging of the block and other	913	1,139
Balance, end of period, before effect of changes in nonperformance risk	5,634	6,536
Effect of changes in nonperformance risk	1,918	2,298
Balance, end of period	7,552	8,834
Less: Reinsurance recoverable, end of period	14	32
Balance, end of period, net of reinsurance	$ 7,538	$ 8,802
Weighted-average attained age of contract holder	74 years 4 months 24 days	73 years 8 months 12 days
Index-linked Annuities
Market Risk Benefit [Roll Forward]
Balance, end of period	$ 29	$ 47