Fair Value Measurements - Level 3 Financial Instruments (Details) - Assets measured on recurring basis - Level 3 - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Assets held in separate accounts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, assets, beginning balance	$ 334	$ 237	$ 316	$ 222
Total Realized/Unrealized Gains (Losses) Included in Net Income	(12)	2	(26)	3
Total Realized/Unrealized Gains (Losses) Included in OCI	0	0	0	0
Purchases	67	71	132	104
Issuances	0	0	0	0
Sales	(3)	0	(4)	(1)
Settlements	0	0	0	0
Transfers in to Level 3	0	0	6	0
Transfers out of Level 3	(37)	(17)	(75)	(35)
Fair Value, assets, ending balance	349	293	349	293
Change in Unrealized Gains (Losses) Included in Earnings	0	0	0	0
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0	0	0	0
Cash and Cash Equivalents
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Derivatives, beginning balance	7		0
Total Realized/Unrealized Gains (Losses) Included in Net Income	0		0
Total Realized/Unrealized Gains (Losses) Included in OCI	0		0
Purchases	0		7
Issues	0		0
Sales	0		0
Settlements	(7)		(7)
Transfers in to Level 3	0		0
Transfers out of Level 3	0		0
Fair Value, Derivatives, ending balance	0		0
Change In Unrealized Gains (Losses) Included in Earnings	0		0
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0		0
Stabilizer (Investment Only) and MCG Contracts
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Derivatives, beginning balance	(15)	(3)	(20)	(53)
Total Realized/Unrealized Gains (Losses) Included in Net Income	11	(12)	17	37
Total Realized/Unrealized Gains (Losses) Included in OCI	0	0	0	0
Purchases	0	0	0	0
Issues	0	0	(1)	0
Sales	0	0	0	0
Settlements	0	0	0	1
Transfers in to Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, Derivatives, ending balance	(4)	(15)	(4)	(15)
Change In Unrealized Gains (Losses) Included in Earnings	0	0	0	0
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0	0	0	0
FIA
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Derivatives, beginning balance	(9)	(10)	(9)	(10)
Total Realized/Unrealized Gains (Losses) Included in Net Income	0	0	0	0
Total Realized/Unrealized Gains (Losses) Included in OCI	0	0	0	0
Purchases	0	0	0	0
Issues	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Transfers in to Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, Derivatives, ending balance	(9)	(10)	(9)	(10)
Change In Unrealized Gains (Losses) Included in Earnings	0	0	0	0
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0	0	0	0
U.S. corporate public securities \| Available-for-sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, assets, beginning balance	47	46	5	57
Total Realized/Unrealized Gains (Losses) Included in Net Income	0	0	0	0
Total Realized/Unrealized Gains (Losses) Included in OCI	0	1	(1)	1
Purchases	0	0	4	0
Issuances	0	0	0	0
Sales	0	0	0	(9)
Settlements	0	(1)	0	(1)
Transfers in to Level 3	0	0	0	0
Transfers out of Level 3	(39)	(28)	0	(30)
Fair Value, assets, ending balance	8	18	8	18
Change in Unrealized Gains (Losses) Included in Earnings	0	0	0	0
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0	1	(1)	1
U.S. corporate private securities \| Available-for-sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, assets, beginning balance	1,424	1,200	1,379	1,286
Total Realized/Unrealized Gains (Losses) Included in Net Income	0	0	1	13
Total Realized/Unrealized Gains (Losses) Included in OCI	(98)	37	(210)	(32)
Purchases	73	18	136	33
Issuances	0	0	0	0
Sales	0	0	0	(88)
Settlements	(42)	(62)	(83)	(88)
Transfers in to Level 3	0	262	110	348
Transfers out of Level 3	(34)	(42)	(10)	(59)
Fair Value, assets, ending balance	1,323	1,413	1,323	1,413
Change in Unrealized Gains (Losses) Included in Earnings	0	0	0	0
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	(98)	39	(210)	(21)
Foreign corporate public securities and foreign governments \| Available-for-sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, assets, beginning balance	3	5	0	0
Total Realized/Unrealized Gains (Losses) Included in Net Income	0	0	0	0
Total Realized/Unrealized Gains (Losses) Included in OCI	0	0	0	0
Purchases	4	7	4	7
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	0	0	0	0
Transfers in to Level 3	0	0	0	0
Transfers out of Level 3	(3)	5	0	0
Fair Value, assets, ending balance	4	7	4	7
Change in Unrealized Gains (Losses) Included in Earnings	0	0	0	0
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0	0	0	0
Foreign corporate private securities \| Available-for-sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, assets, beginning balance	378	274	272	295
Total Realized/Unrealized Gains (Losses) Included in Net Income	(3)	1	(20)	3
Total Realized/Unrealized Gains (Losses) Included in OCI	(5)	7	(24)	1
Purchases	47	1	86	1
Issuances	0	0	0	0
Sales	0	(17)	0	(22)
Settlements	(7)	(2)	(17)	(14)
Transfers in to Level 3	0	0	110	0
Transfers out of Level 3	(107)	0	(104)	0
Fair Value, assets, ending balance	303	264	303	264
Change in Unrealized Gains (Losses) Included in Earnings	(3)	1	(3)	2
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	(5)	7	(24)	(1)
Residential mortgage-backed \| Available-for-sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, assets, beginning balance	37	33	34	33
Total Realized/Unrealized Gains (Losses) Included in Net Income	(5)	(3)	(12)	(5)
Total Realized/Unrealized Gains (Losses) Included in OCI	0	0	0	0
Purchases	0	5	0	8
Issuances	0	0	0	0
Sales	0	0	0	(7)
Settlements	(9)	0	0	0
Transfers in to Level 3	1	3	1	2
Transfers out of Level 3	(2)	(7)	(1)	0
Fair Value, assets, ending balance	22	31	22	31
Change in Unrealized Gains (Losses) Included in Earnings	(5)	(3)	(12)	(5)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0	0	0	0
Commercial mortgage-backed
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, assets, beginning balance				0
Total Realized/Unrealized Gains (Losses) Included in Net Income				0
Total Realized/Unrealized Gains (Losses) Included in OCI				0
Purchases				0
Issuances				0
Sales				(1)
Settlements				(3)
Transfers in to Level 3				4
Transfers out of Level 3				0
Fair Value, assets, ending balance		0		0
Change in Unrealized Gains (Losses) Included in Earnings				0
Commercial mortgage-backed \| Available-for-sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI				0
Other asset-backed securities \| Available-for-sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, assets, beginning balance	36	47	33	37
Total Realized/Unrealized Gains (Losses) Included in Net Income	0	0	0	0
Total Realized/Unrealized Gains (Losses) Included in OCI	(2)	0	(3)	(1)
Purchases	26	10	29	15
Issuances	0	0	0	0
Sales	0	0	(10)	0
Settlements	(1)	(5)	(2)	(17)
Transfers in to Level 3	0	0	0	18
Transfers out of Level 3	(12)	0	0	0
Fair Value, assets, ending balance	47	52	47	52
Change in Unrealized Gains (Losses) Included in Earnings	0	0	0	0
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	(2)	0	(3)	(1)
Fixed maturities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Transfers in to Level 3			0
Fixed maturities \| Available-for-sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, assets, beginning balance	1,925	1,605	1,723	1,708
Total Realized/Unrealized Gains (Losses) Included in Net Income	(8)	(2)	(31)	11
Total Realized/Unrealized Gains (Losses) Included in OCI	(105)	45	(238)	(31)
Purchases	150	41	259	64
Issuances	0	0	0	0
Sales	0	(17)	(10)	(127)
Settlements	(59)	(70)	(102)	(123)
Transfers in to Level 3	1	265	221	372
Transfers out of Level 3	(197)	(82)	(115)	(89)
Fair Value, assets, ending balance	1,707	1,785	1,707	1,785
Change in Unrealized Gains (Losses) Included in Earnings	(8)	(2)	(15)	(3)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	(105)	47	(238)	(22)
Equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, assets, beginning balance	117	148	114	99
Total Realized/Unrealized Gains (Losses) Included in Net Income	(12)	2	(16)	8
Total Realized/Unrealized Gains (Losses) Included in OCI	0	0	0	0
Purchases	23	0	23	75
Issuances	0	0	0	0
Sales	0	(5)	0	(30)
Settlements	0	0	0	(7)
Transfers in to Level 3	0	0		0
Transfers out of Level 3	(7)	0	0	0
Fair Value, assets, ending balance	121	145	121	145
Change in Unrealized Gains (Losses) Included in Earnings	(12)	1	(16)	(1)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	$ 0	0	$ 0	0
Fixed Maturities, Trading
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, assets, beginning balance		0		0
Total Realized/Unrealized Gains (Losses) Included in Net Income		0		0
Total Realized/Unrealized Gains (Losses) Included in OCI		0		0
Purchases		33		33
Issuances		0		0
Sales		0		0
Settlements		0		0
Transfers in to Level 3		0		0
Transfers out of Level 3		0		0
Fair Value, assets, ending balance		33		33
Change in Unrealized Gains (Losses) Included in Earnings		0		0
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI		$ 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 unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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

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- Definition

Amount of issuances 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 purchases 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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- Definition

Amount of sale 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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- Definition

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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- Definition

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

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- Definition

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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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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- Definition

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).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
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-Publisher FASB
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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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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.

+ References

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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.

+ References

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 820
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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
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-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19279-110258

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-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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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.

+ References

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19279-110258

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- Definition

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.

+ References

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+ References

No definition available.

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