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Investments (Components of Net Investment Gains (Losses)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ (42)	$ (96)
Fixed maturity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	(38)	(76)
Equity securities
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	1	(3)
Mortgage loans
Net Investment Gains (Losses) [Line Items]
Net investment gains (losses)	$ (5)	$ (17)

X

- Definition

Amount of realized gain (loss) on investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(3)(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(2)(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1

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