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	$ 7,297	$ 6,888
Items Included in Net Income	(14)	(10)
Gains (Losses) in OCI and Other	(28)	(5)
Issuances, Sales, Maturities, Settlements, Calls, Net	(140)	(83)
Transfers Into or Out of Level 3, Net	(699)	22
Ending Fair Value	$ 6,416	6,812
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)
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		0
Transfers Into or Out of Level 3, Net		0
Ending Fair Value		1
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
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)
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	471
Transfers Into or Out of Level 3, Net	8	50
Ending Fair Value	$ 4,153	2,609
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)
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
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)
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)	1
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	(82)	4
Transfers Into or Out of Level 3, Net	(22)	14
Ending Fair Value	$ 223	278
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	$ 28	34
Items Included in Net Income	(3)	(7)
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	3	2
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	$ 28	29
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)
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
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)
Derivative investments
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Issuances, Sales, Maturities, Settlements, Calls, Net	$ 42
Other investments – short-term 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
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)
Ceded MRBs | Other assets
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	$ 19	14
Items Included in Net Income	60	88
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	$ 79	102
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)
Ceded MRBs | Other liabilities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	$ (2,884)	(2,763)
Items Included in Net Income	248	660
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	$ (2,636)	(2,103)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)
Indexed annuity ceded embedded derivatives | Other assets
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	$ 2,482	1,970
Items Included in Net Income	(52)	(53)
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	41	1
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	$ 2,471	1,918
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)
LPR ceded derivative | Other assets
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	$ 202	190
Items Included in Net Income	(33)	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	$ 169	190
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)
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)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)
Reinsurance-related embedded derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	$ (156)	(59)
Items Included in Net Income	22	(33)
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	$ (134)	(92)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)
Derivative liabilities, net
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Beginning Fair Value	$ (108)	(136)
Items Included in Net Income	1	27
Gains (Losses) in OCI and Other	0	0
Issuances, Sales, Maturities, Settlements, Calls, Net	42	0
Transfers Into or Out of Level 3, Net	0	0
Ending Fair Value	$ (65)	$ (109)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)