Investments (Other Invested Assets) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Other invested assets	$ 1,496	$ 1,242
Equity Release Mortgages [Member]
Other invested assets	1,158	984
Derivatives
Other invested assets	223	121
Other
Other invested assets	46	66
Federal Home Loan Bank Certificates and Obligations (FHLB)
Other invested assets	$ 69	$ 71

Amount of investments classified as other.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(12))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(3)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Name:	us-gaap_OtherInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant