Policyholder Account Balances - Schedule of Changes in Policyholder Account Balance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Policyholder Account Balance [Roll Forward]
Beginning balance	$ 14,594
Net transfers from (to) separate accounts	2	$ 1
Interest credited	386	453	$ 503
Ending balance	13,843	14,594
Life insurance
Policyholder Account Balance [Roll Forward]
Beginning balance	7,235	7,460
Issuances	0	0
Premiums received	447	470
Policy charges	(582)	(599)
Surrenders and withdrawals	(152)	(195)
Benefit payments	(243)	(227)
Net transfers from (to) separate accounts	0	0
Interest credited	297	350
Other	(9)	(24)
Ending balance	$ 6,993	$ 7,235	7,460
Weighted-average crediting rate	3.90%	3.90%
Net amount at risk	$ 39,712	$ 41,378
Cash surrender value	4,021	4,192
Fixed annuities
Policyholder Account Balance [Roll Forward]
Beginning balance	3,789	4,479
Issuances	0	0
Premiums received	16	22
Policy charges	(5)	(6)
Surrenders and withdrawals	(373)	(543)
Benefit payments	(304)	(347)
Net transfers from (to) separate accounts	0	0
Interest credited	125	143
Other	30	41
Ending balance	$ 3,278	$ 3,789	4,479
Weighted-average crediting rate	3.00%	3.00%
Net amount at risk	$ 34	$ 26
Cash surrender value	2,490	2,911
Variable annuities
Policyholder Account Balance [Roll Forward]
Beginning balance	467	529
Issuances	0	0
Premiums received	13	14
Policy charges	(5)	(6)
Surrenders and withdrawals	(44)	(57)
Benefit payments	(60)	(55)
Net transfers from (to) separate accounts	2	1
Interest credited	4	4
Other	43	37
Ending balance	$ 420	$ 467	$ 529
Weighted-average crediting rate	3.30%	3.30%
Net amount at risk	$ 354	$ 386
Cash surrender value	$ 420	$ 467