Investments - ACL on Mortgage Loans (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Dec. 31, 2021	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance				$ 15
Ending balance				26	$ 15
Mortgage loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 0	$ 11	$ 17	15	12
Current period provision (release)	0		(6)	11	3
Ending balance	12	12	11	26	15
Cumulative Effect, Period of Adoption, Adjustment [Member] \| Accounting Standards Update 2016-13 \| Mortgage loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	12		0	0	0
Ending balance	0	0			0
Adjusted balance \| Mortgage loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	12		$ 17	$ 15	12
Ending balance	$ 12	$ 12			$ 15

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

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- Definition

Amount of increase (decrease) in allowance for credit loss on financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B

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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.

+ References

No definition available.

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