DAC, VOBA, DSI, and DFEL - DAC (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Amortization	$ (281)	$ (263)
Traditional Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	1,281	1,335
Deferrals	24	21
Amortization	(35)	(37)
Balance as of end-of-period	1,270	1,319
UL and Other
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	6,057	5,916
Deferrals	106	94
Amortization	(83)	(79)
Balance as of end-of-period	6,080	5,931
Group Protection
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	198	178
Deferrals	30	32
Amortization	(32)	(29)
Balance as of end-of-period	196	181
Retirement Plan Services
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	242	242
Deferrals	5	5
Amortization	(4)	(5)
Balance as of end-of-period	243	242
Variable Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	4,008	3,851
Deferrals	142	136
Amortization	(108)	(97)
Balance as of end-of-period	4,042	3,890
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance as of beginning-of-year	452	394
Deferrals	46	10
Amortization	(19)	(16)
Balance as of end-of-period	$ 479	$ 388