Fair Value of Financial Instruments - Schedule of Investment Holdings Movements (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Corporate bonds | Fixed maturity AFS securities
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	$ 265	$ 249
Sales	(291)	(236)
Maturities	0	0
Settlements	(91)	(96)
Calls	(23)	0
Total	(140)	(83)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	6,416	6,812	$ 7,297	$ 6,888
Items Included in Net Income	(14)	(10)
Gains (Losses) in OCI and Other	(28)	(5)
Transfers Into or Out of Level 3, Net	(699)	22
RMBS | Fixed maturity AFS securities
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Total		0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		1		1
Items Included in Net Income		0
Gains (Losses) in OCI and Other		0
Transfers Into or Out of Level 3, Net		0
CMBS | Fixed maturity AFS securities
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	28	22
Sales	0	0
Maturities	0	0
Settlements	0	0
Calls	0	0
Total	28	22
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	103	30	85	8
Items Included in Net Income	0	0
Gains (Losses) in OCI and Other	(1)	0
Transfers Into or Out of Level 3, Net	(9)	0
ABS | Fixed maturity AFS securities
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	793	587
Sales	0	0
Maturities	0	(10)
Settlements	(162)	(90)
Calls	(24)	(16)
Total	607	471
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	4,153	2,609	3,584	2,092
Items Included in Net Income	(7)	(21)
Gains (Losses) in OCI and Other	(39)	17
Transfers Into or Out of Level 3, Net	8	50
Hybrid and redeemable preferred securities | Fixed maturity AFS securities
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances		20
Sales		(2)
Maturities		0
Settlements		0
Calls		0
Total	0	18
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	82	81	83	63
Items Included in Net Income	0	0
Gains (Losses) in OCI and Other	(1)	0
Transfers Into or Out of Level 3, Net	0	0
Trading securities
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	0	50
Sales	(12)	(42)
Maturities	0	0
Settlements	(5)	(4)
Calls	(65)	0
Total	(82)	4
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	223	278	329	259
Items Included in Net Income	(2)	1
Gains (Losses) in OCI and Other	0	0
Transfers Into or Out of Level 3, Net	(22)	14
Equity securities
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	3	3
Sales	0	(1)
Maturities	0	0
Settlements	0	0
Calls	0	0
Total	3	2
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	28	29	28	34
Items Included in Net Income	(3)	(7)
Gains (Losses) in OCI and Other	0	0
Transfers Into or Out of Level 3, Net	0	0
Mortgage loans on real estate
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	0	0
Sales	0	(1)
Maturities	0	0
Settlements	(1)	0
Calls	0	0
Total	(1)	(1)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	198	232	199	232
Items Included in Net Income	1	(1)
Gains (Losses) in OCI and Other	(1)	2
Transfers Into or Out of Level 3, Net	0	0
Derivative investments
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	42
Sales	0
Maturities	0
Settlements	0
Calls	0
Total	42
Other investments – short-term investments
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	28	2
Sales	0	0
Maturities	(1)	(10)
Settlements	0	0
Calls	0	0
Total	27	(8)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	28	15	1	23
Items Included in Net Income	0	0
Gains (Losses) in OCI and Other	0	0
Transfers Into or Out of Level 3, Net	0	0
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	0	27
Sales	0	0
Maturities	0	0
Settlements	41	(26)
Calls	0	0
Total	41	1
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	2,471	1,918	2,482	1,970
Items Included in Net Income	(52)	(53)
Gains (Losses) in OCI and Other	0	0
Transfers Into or Out of Level 3, Net	0	0
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	(359)	(233)
Sales	0	0
Maturities	0	0
Settlements	426	199
Calls	0	0
Total	67	(34)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	(13,444)	(10,807)	$ (15,115)	$ (12,449)
Items Included in Net Income	1,604	1,676
Gains (Losses) in OCI and Other	0	0
Transfers Into or Out of Level 3, Net	$ 0	$ 0