Fair Value of Financial Instruments - Fair Value Measured on a Recurring Basis Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Corporate bonds | Fixed maturity AFS securities:
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	$ 3,913	$ 2,702
Items Included in Net Income	(14)	(13)
Gains (Losses) in OCI and Other	(30)	(2)
Issuances, Sales, Maturities, Settlements, Calls, Net	133	104
Transfers Into or Out of Level 3, Net	(720)	22
Ending Fair Value	3,282	2,813
RMBS | Fixed maturity AFS securities:
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value		1
Items Included in Net Income		0
Gains (Losses) in OCI and Other		0
Issuances, Sales, Maturities, Settlements, Calls, Net		7
Transfers Into or Out of Level 3, Net		0
Ending Fair Value		8
CMBS | Fixed maturity AFS securities:
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	85	8
Items Included in Net Income	0	0
Gains (Losses) in OCI and Other	(1)	0
Issuances, Sales, Maturities, Settlements, Calls, Net	28	22
Transfers Into or Out of Level 3, Net	(9)	0
Ending Fair Value	103	30
ABS | Fixed maturity AFS securities:
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	3,584	2,092
Items Included in Net Income	(7)	(21)
Gains (Losses) in OCI and Other	(39)	17
Issuances, Sales, Maturities, Settlements, Calls, Net	607	473
Transfers Into or Out of Level 3, Net	8	57
Ending Fair Value	4,153	2,618
Hybrid and redeemable preferred securities | Fixed maturity AFS securities:
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	83	63
Items Included in Net Income	0	0
Gains (Losses) in OCI and Other	(1)	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0	18
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	82	81
Trading securities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	329	259
Items Included in Net Income	(2)	2
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	(82)	0
Transfers Into or Out of Level 3, Net	(22)	20
Ending Fair Value	223	281
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	33	34
Items Included in Net Income	(3)	(6)
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	3	7
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	33	35
Mortgage loans on real estate
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	199	232
Items Included in Net Income	1	(1)
Gains (Losses) in OCI and Other	(1)	2
Issuances, Sales, Maturities, Settlements, Calls, Net	(1)	(1)
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	198	232
Other investments
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	1	23
Items Included in Net Income	0	0
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	27	(8)
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	28	15
Derivative investments
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value		(136)
Items Included in Net Income		27
Gains (Losses) in OCI and Other		0
Issuances, Sales, Maturities, Settlements, Calls, Net	42	0
Transfers Into or Out of Level 3, Net		0
Ending Fair Value		(109)
Ceded MRBs | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	2	2
Items Included in Net Income	0	0
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0	0
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	2	2
Ceded MRBs | Other Liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	(359)	(381)
Items Included in Net Income	30	67
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0	0
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	(329)	(314)
Indexed annuity ceded embedded derivatives | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	1,369	1,115
Items Included in Net Income	(19)	(24)
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	(18)	1
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	1,332	1,092
RILA, fixed indexed annuity and IUL contracts | Policyholder Account Balances
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	(15,115)	(12,449)
Items Included in Net Income	1,604	1,676
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	67	(34)
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	(13,444)	(10,807)
Reinsurance-related embedded derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	(434)	(234)
Items Included in Net Income	182	(89)
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0	0
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	(252)	$ (323)
Derivative liabilities, net
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	(108)
Items Included in Net Income	1
Gains (Losses) in OCI and Other	0
Issuances, Sales, Maturities, Settlements, Calls, Net	42
Transfers Into or Out of Level 3, Net	0
Ending Fair Value	$ (65)