Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Net Derivatives (2)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	$ 9	$ 11	$ 9	$ 18
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	(1)	(1)	(1)	(3)
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases (5)	0	0	0	1
Sales (5)	0	0	0	0
Issuances (5)	0	0	0	0
Settlements (5)	0	0	0	0
Transfers into Level 3 (6)	0	0	0	0
Transfers out of Level 3 (6)	0	0	0	(6)
Balance, end of period	8	10	8	10
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(1)	(1)	(1)	(3)
Changes in unrealized gains (losses) included in OCI	(1)	0	0	0
Embedded Derivatives on Index-Linked Annuities
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	(9,925)	(9,941)	(11,493)	(8,186)
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	(2,161)	(714)	(984)	(2,600)
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases (5)	0	0	0	0
Sales (5)	0	0	0	0
Issuances (5)	0	0	0	0
Settlements (5)	520	72	911	203
Transfers into Level 3 (6)	0	0	0	0
Transfers out of Level 3 (6)	0	0	0	0
Balance, end of period	(11,566)	(10,583)	(11,566)	(10,583)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(2,430)	(881)	(1,480)	(2,921)
Changes in unrealized gains (losses) included in OCI	0	0	0	0
Corporate (1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	666	1,267	1,092	1,320
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	(38)	(15)	(13)	(19)
Total realized/unrealized gains (losses) included in AOCI	38	(2)	13	(9)
Purchases (5)	63	199	106	238
Sales (5)	(10)	(43)	(60)	(84)
Issuances (5)	0	0	0	0
Settlements (5)	0	0	0	0
Transfers into Level 3 (6)	48	41	18	55
Transfers out of Level 3 (6)	(4)	(82)	(393)	(136)
Balance, end of period	763	1,365	763	1,365
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(5)	(15)	(7)	(18)
Changes in unrealized gains (losses) included in OCI	4	(2)	12	(19)
Structured Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	340	482	365	380
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	0	0	0	1
Total realized/unrealized gains (losses) included in AOCI	(3)	2	(5)	2
Purchases (5)	127	129	148	207
Sales (5)	(10)	(26)	(42)	(31)
Issuances (5)	0	0	0	0
Settlements (5)	0	0	0	0
Transfers into Level 3 (6)	0	0	0	0
Transfers out of Level 3 (6)	(48)	(81)	(60)	(53)
Balance, end of period	406	506	406	506
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0	0
Changes in unrealized gains (losses) included in OCI	7	1	(5)	0
Foreign government
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	22	21	21	36
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	0	0	0	0
Total realized/unrealized gains (losses) included in AOCI	2	0	3	0
Purchases (5)	0	0	0	0
Sales (5)	0	0	0	0
Issuances (5)	0	0	0	0
Settlements (5)	0	0	0	0
Transfers into Level 3 (6)	0	0	0	0
Transfers out of Level 3 (6)	0	0	0	(15)
Balance, end of period	24	21	24	21
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0	0
Changes in unrealized gains (losses) included in OCI	2	0	3	0
Trading Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	0	0	0	0
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	0	0	0	0
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases (5)	3	0	3	0
Sales (5)	0	0	0	0
Issuances (5)	0	0	0	0
Settlements (5)	0	0	0	0
Transfers into Level 3 (6)	0	0	0	0
Transfers out of Level 3 (6)	0	0	0	0
Balance, end of period	3	0	3	0
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0	0
Changes in unrealized gains (losses) included in OCI	0	0	0	0
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	14	25	15	25
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	0	(1)	(1)	(1)
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases (5)	0	0	0	0
Sales (5)	(8)	0	(8)	0
Issuances (5)	0	0	0	0
Settlements (5)	0	0	0	0
Transfers into Level 3 (6)	0	0	0	0
Transfers out of Level 3 (6)	0	0	0	0
Balance, end of period	6	24	6	24
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	(2)	0	(2)
Changes in unrealized gains (losses) included in OCI	0	0	0	0
Short-term Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	2	0	2	0
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	0	0	0	0
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases (5)	0	0	0	0
Sales (5)	(2)	0	(2)	0
Issuances (5)	0	0	0	0
Settlements (5)	0	0	0	0
Transfers into Level 3 (6)	0	0	0	0
Transfers out of Level 3 (6)	0	0	0	0
Balance, end of period	0	0	0	0
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0	0
Changes in unrealized gains (losses) included in OCI	$ 0	$ 0	$ 0	$ 0