DAC, VOBA, DSI, and DFEL - DAC (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Amortization	$ (249)	$ (245)
Traditional Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	1,376	1,333
Deferrals	32	55
Amortization	(37)	(36)
Balance as of end-of-period	1,371	1,352
UL and Other
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	5,791	5,605
Deferrals	100	118
Amortization	(76)	(73)
Balance as of end-of-period	5,815	5,650
Group Protection
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	154	141
Deferrals	29	25
Amortization	(26)	(24)
Balance as of end-of-period	157	142
Retirement Plan Services
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	239	236
Deferrals	5	6
Amortization	(5)	(5)
Balance as of end-of-period	239	237
Variable Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	3,751	3,751
Deferrals	89	84
Amortization	(89)	(90)
Balance as of end-of-period	3,751	3,745
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	421	439
Deferrals	9	14
Amortization	(16)	(17)
Balance as of end-of-period	$ 414	$ 436