Fair Value of Financial Instruments - Changes in Unrealized Gains (Losses) Within Level 3 Financial Instruments Carried at Fair Value and Still Held (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	$ 647	$ 349	$ 148	$ 1,258
Trading securities
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	3	(1)	0	(1)
Equity securities
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	(1)	0	(7)	(2)
Mortgage loans on real estate
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	(1)	(3)	(2)	(4)
Derivative investments
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	(6)	(8)	(6)	8
MRBs
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	438	160	(187)	845
Other assets – LPR ceded derivative
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	8	1	8	(4)
Reinsurance-related embedded derivatives
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	0	(28)	(33)	(53)
RILA, fixed indexed annuity and IUL contracts
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	$ 206	$ 228	$ 375	$ 469