Fair Value - Fair Value Option (Details) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	$ (3,204,000,000)	$ 836,000,000	$ 274,000,000
Mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option, loans, 90 days or more past due	0	0
Total gains (losses)	(2,974,000,000)	0	0
Unpaid principal balance	33,653,000,000	15,000,000
Mark to fair value	(2,842,000,000)	2,000,000
Fair value	30,811,000,000	17,000,000
Fair Value, Option, Credit Risk, Gains (Losses) on Assets	(41,000,000)	0	0
Residential Mortgage [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option, loans, 90 days or more past due	472,000,000
Unpaid principal balance	522,000,000
Fair value	472,000,000
Fair Value, Option, Loans Held as Assets, Aggregate Difference	(50,000,000)
Residential Mortgage [Member] \| Loans Insured or Guaranteed by US Government Authorities
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option, loans, 90 days or more past due	221,000,000
Mortgage loans, net of allowances
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option, loans, 90 days or more past due	2,000,000
Unpaid principal balance	74,000,000
Fair value	19,000,000
Fair Value, Option, Loans Held as Assets, Aggregate Difference	(55,000,000)
Investment related gains (losses) \| Mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	(3,213,000,000)	0	0
Investment related gains (losses) \| Trading securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	(424,000,000)	(70,000,000)	33,000,000
Net investment income \| Investment funds
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	114,000,000	826,000,000	295,000,000
Future policy and other policy benefits \| Future policy benefits
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	$ 356,000,000	$ 80,000,000	$ (54,000,000)

Fair Value, Option, Fair Value Carrying Amount, Assets

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- Definition

Fair Value, Option, Unpaid Principal Balance, Assets

+ References

No definition available.

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- Definition

This item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of loans and long-term receivables (other than securities categorized as trading, available-for-sale or held-to-maturity) that have contractual principal amounts and for which the fair value option has been elected.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (d)(1)
-URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612

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- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14172-108612

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This item represents the estimated amount of gains or losses included in earnings during the period attributable to changes in instrument-specific credit risk arising from loans and other receivables held as assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
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-URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14172-108612

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- Definition

This item represents the aggregate fair value of loans held as assets that are 90 days or more past due for which the fair value option has been elected.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
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-URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612

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- Definition

For loans held as assets for which the fair value option has been elected, this item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of those loans that are 90 days or more past due, in nonaccrual status, or both.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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