DAC, VOBA, DSI, and DFEL - DAC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Amortization	$ (1,000)	$ (987)	$ (964)
Traditional Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	1,376	1,333
Deferrals	107	188
Amortization	(148)	(145)
Balance as of end-of-year	1,335	1,376	1,333
UL and Other
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	5,791	5,605
Deferrals	434	482
Amortization	(309)	(296)
Balance as of end-of-year	5,916	5,791	5,605
Group Protection
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	154	141
Deferrals	135	113
Amortization	(111)	(100)
Balance as of end-of-year	178	154	141
Retirement Plan Services
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	239	236
Deferrals	21	21
Amortization	(18)	(18)
Balance as of end-of-year	242	239	236
Variable Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	3,751	3,751
Deferrals	454	361
Amortization	(354)	(361)
Balance as of end-of-year	3,851	3,751	3,751
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	421	439
Deferrals	44	49
Amortization	(71)	(67)
Balance as of end-of-year	$ 394	$ 421	$ 439