DAC, VOBA, DSI, and DFEL - DAC (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Amortization	$ (279)	$ (258)	$ (554)	$ (505)
Traditional Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			1,180	1,294
Business acquired (sold) through reinsurance			0	(19)
Deferrals			5	37
Amortization			(65)	(70)
Balance as of end-of-period	1,120	1,242	1,120	1,242
UL and Other
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			5,864	5,754
Business acquired (sold) through reinsurance			(1)	0
Deferrals			203	183
Amortization			(161)	(154)
Balance as of end-of-period	5,905	5,783	5,905	5,783
Group Protection
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			178	136
Business acquired (sold) through reinsurance			0	13
Deferrals			58	68
Amortization			(57)	(41)
Balance as of end-of-period	179	176	179	176
Retirement Plan Services
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			247	246
Business acquired (sold) through reinsurance			0	0
Deferrals			9	9
Amortization			(9)	(9)
Balance as of end-of-period	247	246	247	246
Variable Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			4,107	3,959
Business acquired (sold) through reinsurance			0	0
Deferrals			270	264
Amortization			(225)	(200)
Balance as of end-of-period	4,152	4,023	4,152	4,023
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year			452	393
Business acquired (sold) through reinsurance			0	0
Deferrals			86	26
Amortization			(37)	(31)
Balance as of end-of-period	$ 501	$ 388	$ 501	$ 388