Fair Value Measurements - Level 3 Rollforwards (Details) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Purchases, sales, issuances and settlements	$ 554,000,000	$ 28,000,000
Transfers in and/or (out of ) Level 3	9,000,000	0
Embedded derivative assets (liabilities)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value	(2,626,000,000)	(5,592,000,000)
Total Realized/Unrealized Gains (Losses) Included in Net Income	4,780,000,000	2,966,000,000
Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	0	0
Purchases, sales, issuances and settlements	0	0
Transfers in and/or (out of ) Level 3	0	0
Fair Value	2,154,000,000	(2,626,000,000)
Funds withheld payable under reinsurance treaties
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value	(3,759,000,000)	(4,453,000,000)
Total Realized/Unrealized Gains (Losses) Included in Net Income	3,249,000,000	708,000,000
Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	0	0
Purchases, sales, issuances and settlements	86,000,000	(14,000,000)
Transfers in and/or (out of ) Level 3	0	0
Fair Value	(424,000,000)	(3,759,000,000)
Debt securities \| Corporate securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value	9,000,000	29,000,000
Total Realized/Unrealized Gains (Losses) Included in Net Income	0	2,000,000
Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	(13,000,000)	0
Purchases, sales, issuances and settlements	12,000,000	10,000,000
Transfers in and/or (out of ) Level 3	48,000,000	(32,000,000)
Fair Value	56,000,000	9,000,000
Equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value	112,000,000	104,000,000
Total Realized/Unrealized Gains (Losses) Included in Net Income	7,000,000	14,000,000
Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	0	0
Purchases, sales, issuances and settlements	3,000,000	(6,000,000)
Transfers in and/or (out of ) Level 3	0	0
Fair Value	122,000,000	112,000,000
Mortgage loans, at fair value under the fair value option
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value	0
Total Realized/Unrealized Gains (Losses) Included in Net Income	(7,000,000)
Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	0
Purchases, sales, issuances and settlements	589,000,000
Transfers in and/or (out of ) Level 3	0
Fair Value	582,000,000	0
Limited partnerships
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value	396,000,000	313,000,000
Total Realized/Unrealized Gains (Losses) Included in Net Income	8,000,000	74,000,000
Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	0	0
Purchases, sales, issuances and settlements	27,000,000	9,000,000
Transfers in and/or (out of ) Level 3	9,000,000	0
Fair Value	440,000,000	396,000,000
GMIB reinsurance recoverable
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value	262,000,000	340,000,000
Total Realized/Unrealized Gains (Losses) Included in Net Income	(92,000,000)	(78,000,000)
Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	0	0
Purchases, sales, issuances and settlements	0	0
Transfers in and/or (out of ) Level 3	0	0
Fair Value	170,000,000	262,000,000
Policy loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value	3,467,000,000	3,454,000,000
Total Realized/Unrealized Gains (Losses) Included in Net Income	29,000,000	(2,000,000)
Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	0	0
Purchases, sales, issuances and settlements	(77,000,000)	15,000,000
Transfers in and/or (out of ) Level 3	0	0
Fair Value	$ 3,419,000,000	$ 3,467,000,000

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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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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- Definition

Amount of gain (loss) recognized in income from 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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Amount of gain (loss) recognized in other comprehensive income (OCI) from 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)(1a)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

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- Definition

Amount of purchases, (sales), issuances and (settlements) 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.

+ References

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-Publisher FASB
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-Section 50
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- Definition

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

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No definition available.

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 2
-Subparagraph (c)(1a)
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Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as a 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 liability into (out of) level 3 of the fair value hierarchy.

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