Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net Derivatives (2)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	$ 27	$ 38	$ 35	$ 36
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	2	3	(3)	(11)
Total realized/unrealized gains (losses) included in AOCI	(3)	21	(3)	36
Purchases (5)	0	0	9	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	(12)	0
Balance, end of period	26	62	26	62
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	3	3	(2)	(4)
Changes in unrealized gains (losses) included in OCI	(3)	21	(3)	36
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	(6,886)	(2,831)	(3,932)	(6,641)
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	913	518	(1,880)	4,106
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)	(58)	(29)	(219)	193
Transfers into Level 3 (6)	0	0	0	0
Transfers out of Level 3 (6)	0	0	0	0
Balance, end of period	(6,031)	(2,342)	(6,031)	(2,342)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	785	461	(2,183)	3,904
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	1,931	1,710	1,787	1,399
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	(9)	0	(12)	(6)
Total realized/unrealized gains (losses) included in AOCI	(19)	(108)	(11)	(286)
Purchases (5)	32	278	119	760
Sales (5)	(56)	(22)	(126)	(159)
Issuances (5)	0	0	0	0
Settlements (5)	0	0	0	0
Transfers into Level 3 (6)	45	16	101	31
Transfers out of Level 3 (6)	(784)	(319)	(718)	(184)
Balance, end of period	1,140	1,555	1,140	1,555
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(9)	0	(11)	0
Changes in unrealized gains (losses) included in OCI	(25)	(109)	(20)	(288)
Structured Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	371	345	365	220
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)	(11)	(2)	(23)
Purchases (5)	17	125	45	230
Sales (5)	(11)	(1)	(17)	(12)
Issuances (5)	0	0	0	0
Settlements (5)	0	0	0	0
Transfers into Level 3 (6)	12	19	10	25
Transfers out of Level 3 (6)	(42)	(138)	(56)	(101)
Balance, end of period	345	339	345	339
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	(3)	(11)	(3)	(23)
Foreign government
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	38	40	38	26
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	0	0	0	0
Total realized/unrealized gains (losses) included in AOCI	(1)	(4)	0	(13)
Purchases (5)	0	0	0	5
Sales (5)	(1)	(1)	(2)	(2)
Issuances (5)	0	0	0	0
Settlements (5)	0	0	0	0
Transfers into Level 3 (6)	0	0	0	19
Transfers out of Level 3 (6)	(3)	0	(3)	0
Balance, end of period	33	35	33	35
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	(1)	(4)	0	(13)
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	24	27	27	13
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	1	1	(3)	1
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases (5)	0	0	1	14
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	25	28	25	28
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	1	1	(2)	1
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	2
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	(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	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