DAC, VOBA, DSI, and DFEL - DAC (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Amortization	$ (252)	$ (248)	$ (754)	$ (742)
Traditional Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			1,332	1,286
Business acquired (sold) through reinsurance			0
Deferrals			85	148
Amortization			(109)	(106)
Balance as of end-of-period	1,308	1,328	1,308	1,328
UL and Other
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			5,709	5,518
Business acquired (sold) through reinsurance			(73)
Deferrals			310	346
Amortization			(225)	(217)
Balance as of end-of-period	5,721	5,647	5,721	5,647
Group Protection
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			154	141
Business acquired (sold) through reinsurance			(38)
Deferrals			101	79
Amortization			(81)	(73)
Balance as of end-of-period	136	147	136	147
Retirement Plan Services
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			244	241
Business acquired (sold) through reinsurance			0
Deferrals			15	15
Amortization			(14)	(14)
Balance as of end-of-period	245	242	245	242
Variable Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			3,868	3,880
Business acquired (sold) through reinsurance			0
Deferrals			308	269
Amortization			(270)	(281)
Balance as of end-of-period	3,906	3,868	3,906	3,868
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			421	439
Business acquired (sold) through reinsurance			0
Deferrals			35	31
Amortization			(55)	(51)
Balance as of end-of-period	$ 401	$ 419	$ 401	$ 419