Fair Value (Unobservable Input Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Derivatives (2)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	$ 30	$ 8	$ 36	$ 2
Total realized/unrealized gains (losses) included in net income (loss) (5) (6)	(5)	8	(15)	16
Total realized/unrealized gains (losses) included in AOCI	12	10	16	9
Purchases (7)	1	0	1	(1)
Sales (7)	0	(6)	0	(6)
Issuances (7)	0	0	0	0
Settlements (7)	0	0	0	0
Transfers into Level 3 (8)	0	0	0	0
Transfers out of Level 3 (8)	0	0	0	0
Balance, end of period	38	20	38	20
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	(5)	3	(15)	2
Changes in unrealized gains (losses) included in OCI for the instruments still held at end of period	12	10	16	9
Net Embedded Derivatives (3)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning of period	(7,160)	(6,774)	(8,614)	(7,301)
Total realized/unrealized gains (losses) included in net income (loss) (5) (6)	2,607	(1,161)	3,986	(496)
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases (7)	0	0	0	0
Sales (7)	0	0	0	0
Issuances (7)	0	0	0	0
Settlements (7)	(114)	(118)	(39)	(256)
Transfers into Level 3 (8)	0	0	0	0
Transfers out of Level 3 (8)	0	0	0	0
Balance, end of period	(4,667)	(8,053)	(4,667)	(8,053)
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	2,563	(1,139)	4,080	(476)
Changes in unrealized gains (losses) included in OCI for the instruments still held at end of period	0	0	0	0
Corporate (1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	1,618	667	1,399	684
Total realized/unrealized gains (losses) included in net income (loss) (5) (6)	(6)	0	(6)	(1)
Total realized/unrealized gains (losses) included in AOCI	(110)	20	(216)	(1)
Purchases (7)	330	231	648	327
Sales (7)	(56)	(12)	(140)	(9)
Issuances (7)	0	0	0	0
Settlements (7)	0	0	0	0
Transfers into Level 3 (8)	90	54	148	54
Transfers out of Level 3 (8)	(156)	(83)	(123)	(177)
Balance, end of period	1,710	877	1,710	877
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	0	0	0	(1)
Changes in unrealized gains (losses) included in OCI for the instruments still held at end of period	(117)	20	(218)	(1)
Structured Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	194	126	220	67
Total realized/unrealized gains (losses) included in net income (loss) (5) (6)	0	0	0	0
Total realized/unrealized gains (losses) included in AOCI	3	1	(12)	1
Purchases (7)	201	163	229	181
Sales (7)	(11)	(9)	(14)	(14)
Issuances (7)	0	0	0	0
Settlements (7)	0	0	0	0
Transfers into Level 3 (8)	34	0	23	0
Transfers out of Level 3 (8)	(76)	(64)	(101)	(18)
Balance, end of period	345	217	345	217
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 for the instruments still held at end of period	2	1	(12)	1
Foreign Government
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	23	0	26	0
Total realized/unrealized gains (losses) included in net income (loss) (5) (6)	0	0	0	0
Total realized/unrealized gains (losses) included in AOCI	(5)	0	(9)	0
Purchases (7)	0	12	5	12
Sales (7)	0	0	(1)	0
Issuances (7)	0	0	0	0
Settlements (7)	0	0	0	0
Transfers into Level 3 (8)	22	0	19	0
Transfers out of Level 3 (8)	0	0	0	0
Balance, end of period	40	12	40	12
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 for the instruments still held at end of period	(5)	0	(9)	0
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	13	3	13	3
Total realized/unrealized gains (losses) included in net income (loss) (5) (6)	1	0	1	0
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases (7)	13	0	13	0
Sales (7)	0	0	0	0
Issuances (7)	0	0	0	0
Settlements (7)	0	0	0	0
Transfers into Level 3 (8)	0	0	0	0
Transfers out of Level 3 (8)	0	0	0	0
Balance, end of period	27	3	27	3
Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period	1	0	1	0
Changes in unrealized gains (losses) included in OCI for the instruments still held at end of period	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) (5) (6)	0	0	0	0
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases (7)	0	0	0	0
Sales (7)	0	0	(2)	0
Issuances (7)	0	0	0	0
Settlements (7)	0	0	0	0
Transfers into Level 3 (8)	0	0	0	0
Transfers out of Level 3 (8)	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 for the instruments still held at end of period	0	0	0	0
Separate Account Assets (4)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	0	2	0	3
Total realized/unrealized gains (losses) included in net income (loss) (5) (6)	0	0	(1)	0
Total realized/unrealized gains (losses) included in AOCI	0	0	0	0
Purchases (7)	0	0	0	0
Sales (7)	0	0	0	0
Issuances (7)	0	0	0	0
Settlements (7)	0	0	0	0
Transfers into Level 3 (8)	0	0	1	0
Transfers out of Level 3 (8)	0	(2)	0	(3)
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 for the instruments still held at end of period	$ 0	$ 0	$ 0	$ 0

Amount of unrealized gain (loss) recognized in other comprehensive income (OCI) from asset (liability) measured at fair value on recurring basis using unobservable input (level 3) and still held.

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Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.

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Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of unrealized gain (loss) recognized in income for derivative asset (liability) after deduction of derivative liability (asset), measured at fair value using unobservable input (level 3) and still held.

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Amount of gain (loss) recognized in income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3).

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Amount of gain (loss) recognized in other comprehensive income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3).

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Amount of issuances of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of purchases of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of sales of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of settlements of financial instrument classified as a derivative asset (liability) after deduction of derivative liability, measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of transfers of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) into level 3 of the fair value hierarchy.

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Amount of transfers of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset) out of level 3 of the fair value hierarchy.

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Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of unrealized gain (loss) recognized in other comprehensive income (OCI) from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value using unobservable input (level 3) and still held.

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