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	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	$ 618	$ 451	$ 2,310	$ 1,637
Sales	(148)	(112)	(751)	(382)
Maturities	(5)	1	(31)	(3)
Settlements	34	2	121	573
Calls	(32)	(46)	(99)	(58)
Total	467	296	1,550	1,767
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	(3,851)	(2,655)	(3,851)	(2,655)	$ (2,404)	$ (3,463)	$ (2,197)	$ (129)
Items Included in Net Income	(1,772)	(657)	(1,999)	(3,955)
Gains (Losses) in OCI and Other	39	94	49	85
Transfers Into or Out of Level 3, Net	(181)	(191)	12	(423)
Corporate bonds | Fixed maturity AFS securities
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	352	273	1,208	1,184
Sales	(101)	(92)	(582)	(298)
Maturities	0	0	(6)	(2)
Settlements	(161)	(170)	(381)	(391)
Calls	0	0	(10)	(1)
Total	90	11	229	492
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	7,287	6,859	7,287	6,859	7,240	7,025	6,817	6,469
Items Included in Net Income	(6)	(1)	(40)	(1)
Gains (Losses) in OCI and Other	5	39	4	23
Transfers Into or Out of Level 3, Net	(42)	(7)	69	(124)
RMBS | Fixed maturity AFS securities
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
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	12	13	12	13	79	12	18	13
Items Included in Net Income	0	0	0	0
Gains (Losses) in OCI and Other	1	0	1	(1)
Transfers Into or Out of Level 3, Net	(68)	(5)	(75)	(5)
CMBS | Fixed maturity AFS securities
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	19	14	74	28
Sales	0	0	(15)	0
Maturities	0	0	0	0
Settlements	0	0	0	0
Calls	0	0	0	0
Total	19	14	59	28
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	61	21	61	21	41	8	22	8
Items Included in Net Income	0	0	0	0
Gains (Losses) in OCI and Other	1	1	1	1
Transfers Into or Out of Level 3, Net	0	(16)	(7)	(16)
ABS | Fixed maturity AFS securities
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
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	3,389	2,101	3,389	2,101	3,000	2,099	1,997	1,484
Items Included in Net Income	0	1	(21)	2
Gains (Losses) in OCI and Other	33	49	40	54
Transfers Into or Out of Level 3, Net	(71)	(178)	(53)	(237)
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		16	21	16
Sales		0	(2)	0
Maturities		0	0	0
Settlements		0	0	0
Calls		0	0	0
Total	0	16	19	16
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	91	76	91	76	91	72	50	48
Items Included in Net Income	0	0	0	0
Gains (Losses) in OCI and Other	0	1	0	3
Transfers Into or Out of Level 3, Net	0	9	0	9
Trading securities
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	22	1	83	5
Sales	(8)	0	(60)	(2)
Maturities	(5)	0	(5)	0
Settlements	(5)	(7)	(11)	(20)
Calls	0	0	0	0
Total	4	(6)	7	(17)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	303	274	303	274	296	265	273	284
Items Included in Net Income	3	7	7	7
Gains (Losses) in OCI and Other	0	0	0	0
Transfers Into or Out of Level 3, Net	0	0	24	0
Equity securities
Fair Value Investments Entities That Calculate Net Asset Value Per Share Unobservable Input Investment Holdings Movements [Abstract]
Issuances	4	1	14	1
Sales	(1)	0	(13)	(1)
Maturities	0	0	0	0
Settlements	0	0	0	0
Calls	0	0	0	0
Total	3	1	1	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	81	35	81	35	78	34	38	42
Items Included in Net Income	0	0	(8)	(3)
Gains (Losses) in OCI and Other	0	0	0	0
Transfers Into or Out of Level 3, Net	0	(4)	54	(4)
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)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	230	263	230	263	232	232	258	288
Items Included in Net Income	(1)	2	(3)	6
Gains (Losses) in OCI and Other	(1)	4	3	5
Transfers Into or Out of Level 3, Net	0	0	0	0
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
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	(111)	(1)	(111)	(1)		(136)	(8)	36
Items Included in Net Income		6	25	11
Gains (Losses) in OCI and Other		0	0	0
Transfers Into or Out of Level 3, Net		0	0	(51)
Other investments – short-term 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
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	8	20	8	20	24	23	0	0
Items Included in Net Income	0	0	0	0
Gains (Losses) in OCI and Other	0	0	0	0
Transfers Into or Out of Level 3, Net	0	10	0	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	127	103
Sales	0	0	0	0
Maturities	0	0	0	0
Settlements	39	(78)	35	642
Calls	0	0	0	0
Total	76	(27)	162	745
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	2,320	1,961	2,320	1,961	2,134	1,970	1,756	940
Items Included in Net Income	110	232	188	276
Gains (Losses) in OCI and Other	0	0	0	0
Transfers Into or Out of Level 3, Net	0	0	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	(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)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	(14,918)	(12,270)	(14,918)	(12,270)	$ (13,089)	$ (12,449)	$ (11,417)	$ (9,077)
Items Included in Net Income	(1,693)	(898)	(2,161)	(2,915)
Gains (Losses) in OCI and Other	0	0	0	0
Transfers Into or Out of Level 3, Net	$ 0	$ 0	$ 0	$ 0