DAC, VOBA, DSI, and DFEL - DAC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			$ 10,975
Amortization	$ (987)	$ (964)	(958)
Traditional Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	1,333	1,195	1,082
Deferrals	188	266
Amortization	(145)	(128)
Balance as of end-of-year	1,376	1,333	1,195
UL and Other
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	5,605	5,360	5,425
Deferrals	482	539
Amortization	(296)	(294)
Balance as of end-of-year	5,791	5,605	5,360
Group Protection
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	141	140	187
Deferrals	113	98
Amortization	(100)	(97)
Balance as of end-of-year	154	141	140
Retirement Plan Services
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	236	235	232
Deferrals	21	20
Amortization	(18)	(19)
Balance as of end-of-year	239	236	235
Variable Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	3,751	3,717	3,570
Deferrals	361	391
Amortization	(361)	(357)
Balance as of end-of-year	3,751	3,751	3,717
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	439	448	479
Deferrals	49	60
Amortization	(67)	(69)
Balance as of end-of-year	$ 421	$ 439	$ 448