Investments - Available-for-sale Impairment Losses (Gains) Recognized in Earnings (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Fixed maturity securities available-for-sale:
Impairment losses recognized in earnings	$ 11	$ 7
Mortgage Loans
Fixed maturity securities available-for-sale:
Losses recognized on mortgage loans due to changes in expected credit losses	0	0
Corporate and other bonds
Fixed maturity securities available-for-sale:
Impairment losses recognized in earnings	8	7
Asset-backed
Fixed maturity securities available-for-sale:
Impairment losses recognized in earnings	$ 3

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-22

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration