Fair Value of Financial Instruments - Fair Value Measured on a Recurring Basis Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	$ (2,404)	$ (2,197)	$ (3,463)	$ (129)
Items Included in Net Income	(1,772)	(657)	(1,999)	(3,955)
Gains (Losses) in OCI and Other	39	94	49	85
Issuances, Sales, Maturities, Settlements, Calls, Net	467	296	1,550	1,767
Transfers Into or Out of Level 3, Net	(181)	(191)	12	(423)
Ending Fair Value	$ (3,851)	$ (2,655)	$ (3,851)	$ (2,655)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)	Realized gain (loss)	Realized gain (loss)	Realized gain (loss)
Corporate bonds | Fixed maturity AFS securities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	$ 7,240	$ 6,817	$ 7,025	$ 6,469
Items Included in Net Income	(6)	(1)	(40)	(1)
Gains (Losses) in OCI and Other	5	39	4	23
Issuances, Sales, Maturities, Settlements, Calls, Net	90	11	229	492
Transfers Into or Out of Level 3, Net	(42)	(7)	69	(124)
Ending Fair Value	7,287	6,859	7,287	6,859
State and municipal bonds | Fixed maturity AFS securities
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		0
RMBS | Fixed maturity AFS securities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	79	18	12	13
Items Included in Net Income	0	0	0	0
Gains (Losses) in OCI and Other	1	0	1	(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	0	0	74	6
Transfers Into or Out of Level 3, Net	(68)	(5)	(75)	(5)
Ending Fair Value	12	13	12	13
CMBS | Fixed maturity AFS securities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	41	22	8	8
Items Included in Net Income	0	0	0	0
Gains (Losses) in OCI and Other	1	1	1	1
Issuances, Sales, Maturities, Settlements, Calls, Net	19	14	59	28
Transfers Into or Out of Level 3, Net	0	(16)	(7)	(16)
Ending Fair Value	61	21	61	21
ABS | Fixed maturity AFS securities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	3,000	1,997	2,099	1,484
Items Included in Net Income	0	1	(21)	2
Gains (Losses) in OCI and Other	33	49	40	54
Issuances, Sales, Maturities, Settlements, Calls, Net	427	232	1,324	798
Transfers Into or Out of Level 3, Net	(71)	(178)	(53)	(237)
Ending Fair Value	3,389	2,101	3,389	2,101
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	91	50	72	48
Items Included in Net Income	0	0	0	0
Gains (Losses) in OCI and Other	0	1	0	3
Issuances, Sales, Maturities, Settlements, Calls, Net	0	16	19	16
Transfers Into or Out of Level 3, Net	0	9	0	9
Ending Fair Value	91	76	91	76
Trading securities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	296	273	265	284
Items Included in Net Income	3	7	7	7
Gains (Losses) in OCI and Other	0	0	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	4	(6)	7	(17)
Transfers Into or Out of Level 3, Net	0	0	24	0
Ending Fair Value	303	274	303	274
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	78	38	34	42
Items Included in Net Income	0	0	(8)	(3)
Gains (Losses) in OCI and Other	0	0	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	3	1	1	0
Transfers Into or Out of Level 3, Net	0	(4)	54	(4)
Ending Fair Value	81	35	81	35
Mortgage loans on real estate
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	232	258	232	288
Items Included in Net Income	(1)	2	(3)	6
Gains (Losses) in OCI and Other	(1)	4	3	5
Issuances, Sales, Maturities, Settlements, Calls, Net	0	(1)	(2)	(36)
Transfers Into or Out of Level 3, Net	0	0	0	0
Ending Fair Value	230	263	230	263
Derivative investments
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value		(8)	(136)	36
Items Included in Net Income		6	25	11
Gains (Losses) in OCI and Other		0	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net		1	0	3
Transfers Into or Out of Level 3, Net		0	0	(51)
Ending Fair Value	(111)	(1)	(111)	(1)
Other investments – short-term investments
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	24	0	23	0
Items Included in Net Income	0	0	0	0
Gains (Losses) in OCI and Other	0	0	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	(16)	10	(15)	10
Transfers Into or Out of Level 3, Net	0	10	0	10
Ending Fair Value	8	20	8	20
Ceded MRBs | Other assets
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	20	39	14	274
Items Included in Net Income	(3)	11	3	(224)
Gains (Losses) in OCI and Other	0	0	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0	0	0	0
Transfers Into or Out of Level 3, Net	0	0	0	0
Ending Fair Value	17	50	17	50
Ceded MRBs | Other liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	(2,541)	(2,189)	(2,763)	(1,149)
Items Included in Net Income	(148)	(28)	74	(1,068)
Gains (Losses) in OCI and Other	0	0	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0	0	0	0
Transfers Into or Out of Level 3, Net	0	0	0	0
Ending Fair Value	(2,689)	(2,217)	(2,689)	(2,217)
Indexed annuity ceded embedded derivatives | Other assets
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	2,134	1,756	1,970	940
Items Included in Net Income	110	232	188	276
Gains (Losses) in OCI and Other	0	0	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	76	(27)	162	745
Transfers Into or Out of Level 3, Net	0	0	0	0
Ending Fair Value	2,320	1,961	2,320	1,961
LPR ceded derivative | Other assets
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	198	202	190	206
Items Included in Net Income	6	0	14	(4)
Gains (Losses) in OCI and Other	0	0	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0	0	0	0
Transfers Into or Out of Level 3, Net	0	0	0	0
Ending Fair Value	204	202	204	202
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	(13,089)	(11,417)	(12,449)	(9,077)
Items Included in Net Income	(1,693)	(898)	(2,161)	(2,915)
Gains (Losses) in OCI and Other	0	0	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	(136)	45	(308)	(278)
Transfers Into or Out of Level 3, Net	0	0	0	0
Ending Fair Value	(14,918)	(12,270)	(14,918)	(12,270)
Reinsurance-related embedded derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	(92)	(53)	(59)	0
Items Included in Net Income	(44)	11	(77)	(42)
Gains (Losses) in OCI and Other	0	0	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	0	0	0	0
Transfers Into or Out of Level 3, Net	0	0	0	0
Ending Fair Value	(136)	$ (42)	(136)	$ (42)
Derivative liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	(115)
Items Included in Net Income	4
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	$ (111)		$ (111)