DAC, VOBA, DSI, and DFEL - DAC (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Amortization	$ (273)	$ (252)	$ (778)	$ (754)
Traditional Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			1,294	1,332
Business acquired (sold) through reinsurance			(19)	0
Deferrals			40	85
Amortization			(104)	(109)
Balance as of end-of-period	1,211	1,308	1,211	1,308
UL and Other
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			5,754	5,709
Business acquired (sold) through reinsurance			0	(73)
Deferrals			287	310
Amortization			(231)	(225)
Balance as of end-of-period	5,810	5,721	5,810	5,721
Group Protection
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			136	154
Business acquired (sold) through reinsurance			(4)	(38)
Deferrals			103	101
Amortization			(69)	(81)
Balance as of end-of-period	166	136	166	136
Retirement Plan Services
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			246	244
Business acquired (sold) through reinsurance			0	0
Deferrals			14	15
Amortization			(14)	(14)
Balance as of end-of-period	246	245	246	245
Variable Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			3,959	3,868
Business acquired (sold) through reinsurance			0	0
Deferrals			404	308
Amortization			(314)	(270)
Balance as of end-of-period	4,049	3,906	4,049	3,906
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			393	421
Business acquired (sold) through reinsurance			0	0
Deferrals			60	35
Amortization			(46)	(55)
Balance as of end-of-period	$ 407	$ 401	$ 407	$ 401