Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net Derivatives (2)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	$ 10	$ 27	$ 18	$ 35
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	(3)	0	(3)
Purchases (5)	0	0	0	9
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	(7)	(12)
Balance, end of period	10	26	10	26
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(1)	3	(2)	(2)
Changes in unrealized gains (losses) included in OCI	0	(3)	0	(3)
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	(10,583)	(6,886)	(8,186)	(3,932)
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	(1,064)	913	(3,664)	(1,880)
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)	120	(58)	323	(219)
Transfers into Level 3 (6)	0	0	0	0
Transfers out of Level 3 (6)	0	0	0	0
Balance, end of period	(11,527)	(6,031)	(11,527)	(6,031)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(1,262)	785	(4,183)	(2,183)
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	1,365	1,931	1,320	1,787
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	(23)	(9)	(43)	(12)
Total realized/unrealized gains (losses) included in AOCI	34	(19)	29	(11)
Purchases (5)	65	32	241	119
Sales (5)	(57)	(56)	(174)	(126)
Issuances (5)	0	0	0	0
Settlements (5)	0	0	0	0
Transfers into Level 3 (6)	33	45	19	101
Transfers out of Level 3 (6)	(325)	(784)	(300)	(718)
Balance, end of period	1,092	1,140	1,092	1,140
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(17)	(9)	(35)	(11)
Changes in unrealized gains (losses) included in OCI	0	(25)	(5)	(20)
Structured Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	506	371	380	365
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	0	0	1	0
Total realized/unrealized gains (losses) included in AOCI	4	(2)	7	(2)
Purchases (5)	105	17	134	45
Sales (5)	(93)	(11)	(59)	(17)
Issuances (5)	0	0	0	0
Settlements (5)	0	0	0	0
Transfers into Level 3 (6)	0	12	0	10
Transfers out of Level 3 (6)	(126)	(42)	(67)	(56)
Balance, end of period	396	345	396	345
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	4	(3)	4	(3)
Foreign government
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	21	38	36	38
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	(1)	1	0
Purchases (5)	0	0	0	0
Sales (5)	0	(1)	0	(2)
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	(3)	(14)	(3)
Balance, end of period	23	33	23	33
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	(1)	1	0
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	24	24	25	27
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	(2)	1	(3)	(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	0
Balance, end of period	22	25	22	25
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(1)	1	(3)	(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	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)	2	0	2	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	2	0	2	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