Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net Derivatives (2)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	$ 18	$ 35
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	(3)	0
Total realized/unrealized gains (losses) included in AOCI	0	(1)
Purchases (5)	2	0
Sales (5)	0	0
Issuances (5)	0	0
Settlements (5)	0	0
Transfers into Level 3 (6)	0	0
Transfers out of Level 3 (6)	(6)	(1)
Balance, end of period	11	33
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(3)	0
Changes in unrealized gains (losses) included in OCI	0	(1)
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	(8,186)	(3,932)
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	(1,886)	(1,090)
Total realized/unrealized gains (losses) included in AOCI	0	0
Purchases (5)	0	0
Sales (5)	0	0
Issuances (5)	0	0
Settlements (5)	131	(142)
Transfers into Level 3 (6)	0	0
Transfers out of Level 3 (6)	0	0
Balance, end of period	(9,941)	(5,164)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(2,040)	(1,166)
Changes in unrealized gains (losses) included in OCI	0	0
Corporate (1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	1,320	1,787
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	(5)	1
Total realized/unrealized gains (losses) included in AOCI	(8)	24
Purchases (5)	37	142
Sales (5)	(28)	(13)
Issuances (5)	0	0
Settlements (5)	0	0
Transfers into Level 3 (6)	15	19
Transfers out of Level 3 (6)	(64)	(24)
Balance, end of period	1,267	1,936
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(3)	1
Changes in unrealized gains (losses) included in OCI	(19)	23
Structured Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	380	365
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	0	(1)
Total realized/unrealized gains (losses) included in AOCI	0	1
Purchases (5)	147	19
Sales (5)	(5)	(4)
Issuances (5)	0	0
Settlements (5)	0	0
Transfers into Level 3 (6)	0	1
Transfers out of Level 3 (6)	(40)	(31)
Balance, end of period	482	350
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	(1)
Changes in unrealized gains (losses) included in OCI	(2)	1
Foreign Government
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	36	38
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	0	0
Total realized/unrealized gains (losses) included in AOCI	0	1
Purchases (5)	0	0
Sales (5)	0	0
Issuances (5)	0	0
Settlements (5)	0	0
Transfers into Level 3 (6)	0	0
Transfers out of Level 3 (6)	(15)	0
Balance, end of period	21	39
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0
Changes in unrealized gains (losses) included in OCI	0	1
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	25	27
Total realized/unrealized gains (losses) included in net income (loss) (3) (4)	0	(2)
Total realized/unrealized gains (losses) included in AOCI	0	0
Purchases (5)	0	0
Sales (5)	0	0
Issuances (5)	0	0
Settlements (5)	0	0
Transfers into Level 3 (6)	0	0
Transfers out of Level 3 (6)	0	0
Balance, end of period	25	25
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	(2)
Changes in unrealized gains (losses) included in OCI	$ 0	$ 0