Fair Value of Financial Instruments - Schedule of Investment Holdings Movements (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	$ 609	$ 459	$ 2,113	$ 1,377
Sales	(54)	(81)	(464)	(344)
Maturities	(5)	1	(31)	(3)
Settlements	(14)	3	52	(223)
Calls	(32)	(46)	(99)	(58)
Total	504	336	1,571	749
Corporate bonds | Fixed maturity AFS securities, at fair value
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	342	281	1,002	922
Sales	(7)	(61)	(295)	(260)
Maturities	0	0	(6)	(2)
Settlements	(166)	(170)	(391)	(395)
Calls	0	0	(10)	(1)
Total	169	50	300	264
RMBS | Fixed maturity AFS securities, at fair value
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances			75	6
Sales			0	0
Maturities			0	0
Settlements			(1)	0
Calls			0	0
Total	0	0	74	6
CMBS | Fixed maturity AFS securities, at fair value
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	19	14	74	29
Sales	0	0	(15)	0
Maturities	0	0	0	0
Settlements	0	0	0	0
Calls	0	0	0	0
Total	19	14	59	29
ABS | Fixed maturity AFS securities, at fair value
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	581	402	1,752	1,128
Sales	(38)	(20)	(78)	(50)
Maturities	0	0	(10)	0
Settlements	(84)	(104)	(251)	(223)
Calls	(32)	(46)	(89)	(57)
Total	427	232	1,324	798
Hybrid and redeemable preferred securities | Fixed maturity AFS securities, at fair value
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances			21	16
Sales			(2)	0
Maturities			0	0
Settlements			0	0
Calls			0	0
Total	0	16	19	16
Trading securities
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	22	1	83	6
Sales	(8)	0	(60)	(2)
Maturities	(5)	0	(5)	0
Settlements	(5)	(7)	(11)	(21)
Calls	0	0	0	0
Total	4	(6)	7	(17)
Equity securities
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	5	1	20	1
Sales	(1)	0	(13)	(1)
Maturities	0	0	0	0
Settlements	0	0	0	0
Calls	0	0	0	0
Total	4	1	7	0
Mortgage loans on real estate
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	1	0	2	1
Sales	0	0	(1)	(31)
Maturities	0	0	0	0
Settlements	(1)	(1)	(3)	(6)
Calls	0	0	0	0
Total	0	(1)	(2)	(36)
Derivative investments
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances		0		4
Sales		0		0
Maturities		1		(1)
Settlements		0		0
Calls		0		0
Total		1	0	3
Other investments
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	0	10	11	10
Sales	0	0	0	0
Maturities	0	0	(10)	0
Settlements	(16)	0	(16)	0
Calls	0	0	0	0
Total	(16)	10	(15)	10
Indexed annuity ceded embedded derivatives | Other Assets
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	37	51	130	103
Sales	0	0	0	0
Maturities	0	0	0	0
Settlements	(4)	(77)	(24)	(149)
Calls	0	0	0	0
Total	33	(26)	106	(46)
RILA, fixed indexed annuity and IUL contracts | Policyholder Account Balances
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	(398)	(317)	(1,057)	(849)
Sales	0	0	0	0
Maturities	0	0	0	0
Settlements	262	362	749	571
Calls	0	0	0	0
Total	$ (136)	$ 45	$ (308)	$ (278)