DAC, VOBA, DSI, and DFEL - DAC (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Amortization	$ (263)	$ (249)
Traditional Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	1,335	1,376
Deferrals	21	32
Amortization	(37)	(37)
Balance as of end-of-period	1,319	1,371
UL and Other
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	5,916	5,791
Deferrals	94	100
Amortization	(79)	(76)
Balance as of end-of-period	5,931	5,815
Group Protection
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	178	154
Deferrals	32	29
Amortization	(29)	(26)
Balance as of end-of-period	181	157
Retirement Plan Services
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	242	239
Deferrals	5	5
Amortization	(5)	(5)
Balance as of end-of-period	242	239
Variable Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	3,851	3,751
Deferrals	136	89
Amortization	(97)	(89)
Balance as of end-of-period	3,890	3,751
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	394	421
Deferrals	10	9
Amortization	(16)	(16)
Balance as of end-of-period	$ 388	$ 414