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			$ 11,000
Amortization	$ (992)	$ (969)	(969)
Traditional Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	1,286	1,146	1,041
Deferrals	188	266
Amortization	(142)	(126)
Balance as of end-of-year	1,332	1,286	1,146
UL and Other
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	5,518	5,269	5,328
Deferrals	482	537
Amortization	(291)	(288)
Balance as of end-of-year	5,709	5,518	5,269
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	241	239	238
Deferrals	21	21
Amortization	(18)	(19)
Balance as of end-of-year	244	241	239
Variable Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	3,880	3,860	3,727
Deferrals	361	390
Amortization	(373)	(370)
Balance as of end-of-year	3,868	3,880	3,860
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	439	448	479
Deferrals	50	60
Amortization	(68)	(69)
Balance as of end-of-year	$ 421	$ 439	$ 448