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	$ (277)	$ (253)	$ (803)	$ (754)
Traditional Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			1,335	1,376
Deferrals			66	85
Amortization			(107)	(111)
Balance as of end-of-period	1,294	1,350	1,294	1,350
UL and Other
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			5,916	5,791
Deferrals			321	320
Amortization			(238)	(231)
Balance as of end-of-period	5,999	5,880	5,999	5,880
Group Protection
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			178	154
Deferrals			103	100
Amortization			(90)	(81)
Balance as of end-of-period	191	173	191	173
Retirement Plan Services
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			242	239
Deferrals			14	15
Amortization			(14)	(14)
Balance as of end-of-period	242	240	242	240
Variable Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			3,851	3,751
Deferrals			404	307
Amortization			(307)	(262)
Balance as of end-of-period	3,948	3,796	3,948	3,796
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			394	421
Deferrals			60	35
Amortization			(47)	(55)
Balance as of end-of-period	$ 407	$ 401	$ 407	$ 401