Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Net Derivatives (2)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	$ 8	$ 10	$ 9	$ 18
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	0	0	(1)	(1)
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)	0	0	0	0
Transfers into Level 3 (6)	0	0	0	0
Transfers out of Level 3 (6)	0	0	0	(7)
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	0	(1)	0	(2)
Changes in unrealized gains (losses) included in OCI	0	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	(11,566)	(10,583)	(11,493)	(8,186)
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	(1,756)	(1,064)	(2,740)	(3,664)
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)	631	120	1,542	323
Transfers into Level 3 (6)	0	0	0	0
Transfers out of Level 3 (6)	0	0	0	0
Balance, end of period	(12,691)	(11,527)	(12,691)	(11,527)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(2,088)	(1,262)	(3,568)	(4,183)
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	763	1,365	1,092	1,320
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	2	(23)	(11)	(43)
Total realized/unrealized gains (losses) included in AOCI	3	34	16	29
Purchases (5)	106	65	153	241
Sales (5)	(118)	(57)	(178)	(174)
Issuances (5)	0	0	0	0
Settlements (5)	0	0	0	0
Transfers into Level 3 (6)	0	33	18	19
Transfers out of Level 3 (6)	(59)	(325)	(393)	(300)
Balance, end of period	697	1,092	697	1,092
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	(17)	(7)	(35)
Changes in unrealized gains (losses) included in OCI	1	0	14	(5)
Structured Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	406	506	365	380
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	3	0	3	1
Total realized/unrealized gains (losses) included in AOCI	(1)	4	(6)	7
Purchases (5)	53	105	92	134
Sales (5)	(35)	(93)	(77)	(59)
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)	(109)	(126)	(60)	(67)
Balance, end of period	317	396	317	396
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	4	(5)	4
Foreign government
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	24	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	0	2	3	1
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	(14)
Balance, end of period	24	23	24	23
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	2	3	1
Trading Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	3	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)	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)	(3)	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
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	6	24	15	25
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	0	(2)	(1)	(3)
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases (5)	0	0	0	0
Sales (5)	0	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	22	6	22
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	(1)	0	(3)
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	0	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)	5	2	5	2
Sales (5)	0	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	5	2	5	2
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