Fair Value of Financial Instruments - Fair Value Measured on a Recurring Basis Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	$ (6,472)	$ (4,458)
Items Included in Net Income	1,617	(1,548)
Gains (Losses) in OCI and Other	21	(8)
Issuances, Sales, Maturities, Settlements, Calls, Net	593	72
Transfers Into or Out of Level 3, Net	86	(70)
Ending Fair Value	(4,155)	(6,012)
Corporate bonds | Fixed maturity AFS securities, at fair value
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	2,865	2,497
Items Included in Net Income	(13)	2
Gains (Losses) in OCI and Other	1	(10)
Issuances, Sales, Maturities, Settlements, Calls, Net	99	22
Transfers Into or Out of Level 3, Net	22	(22)
Ending Fair Value	2,974	2,489
State and municipal bonds | Fixed maturity AFS securities, at fair value
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value		5
Items Included in Net Income		0
Gains (Losses) in OCI and Other		0
Issuances, Sales, Maturities, Settlements, Calls, Net		0
Transfers Into or Out of Level 3, Net		(5)
Ending Fair Value		0
RMBS | Fixed maturity AFS securities, at fair value
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	12	13
Items Included in Net Income	0	0
Gains (Losses) in OCI and Other	0	(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	7	0
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	19	12
CMBS | Fixed maturity AFS securities, at fair value
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	8	8
Items Included in Net Income	0	0
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	22	0
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	30	8
ABS | Fixed maturity AFS securities, at fair value
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	2,099	1,484
Items Included in Net Income	(21)	0
Gains (Losses) in OCI and Other	18	(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	478	201
Transfers Into or Out of Level 3, Net	57	8
Ending Fair Value	2,631	1,692
Hybrid and redeemable preferred securities | Fixed maturity AFS securities, at fair value
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	73	48
Items Included in Net Income	0	0
Gains (Losses) in OCI and Other	0	3
Issuances, Sales, Maturities, Settlements, Calls, Net	18	0
Transfers Into or Out of Level 3, Net	(10)	0
Ending Fair Value	81	51
Trading securities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	265	284
Items Included in Net Income	1	0
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	4	(13)
Transfers Into or Out of Level 3, Net	17	0
Ending Fair Value	287	271
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	34	42
Items Included in Net Income	(6)	(3)
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	7	0
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	35	39
Mortgage loans on real estate
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	232	288
Items Included in Net Income	(1)	0
Gains (Losses) in OCI and Other	2	1
Issuances, Sales, Maturities, Settlements, Calls, Net	(1)	0
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	232	289
Other investments
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	23
Items Included in Net Income	0
Gains (Losses) in OCI and Other	0
Issuances, Sales, Maturities, Settlements, Calls, Net	(8)
Transfers Into or Out of Level 3, Net	0
Ending Fair Value	15
Derivative investments
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value		36
Items Included in Net Income		12
Gains (Losses) in OCI and Other		0
Issuances, Sales, Maturities, Settlements, Calls, Net		4
Transfers Into or Out of Level 3, Net		(51)
Ending Fair Value		1
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	(381)	(239)
Items Included in Net Income	67	(121)
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	(314)	(360)
Indexed annuity ceded embedded derivatives | Other Assets
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	1,115	940
Items Included in Net Income	(24)	33
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	1	0
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	1,092	973
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	(12,449)	(9,077)
Items Included in Net Income	1,676	(1,677)
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	(34)	(142)
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	(10,807)	(10,896)
Reinsurance-related embedded derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	(234)	(789)
Items Included in Net Income	(89)	206
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	(323)	$ (583)
Derivative liabilities
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	0
Transfers Into or Out of Level 3, Net	0
Ending Fair Value	$ (109)