Financing Receivables - Credit Quality - Commercial Mortgage Loans by LTV Ratio and Year of Origination (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Amortized cost basis by year of origination and loan-to-value ratio
Loan write-offs	$ 4	$ 6
Commercial Loans
Amortized cost basis by year of origination and loan-to-value ratio
Loan write-offs	1	$ 3
Commercial Loans \| Commercial mortgage loans
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	195		$ 188
Year 2	185		76
Year 3	71		105
Year 4	104		180
Year 5	172		106
Prior	1,266		1,247
Total	1,993		1,902
Loan write-offs	0
Commercial Loans \| Commercial mortgage loans \| Greater than 100 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	0		0
Year 2	0		0
Year 3	0		0
Year 4	0		0
Year 5	0		0
Prior	15		15
Total	15		15
Commercial Loans \| Commercial mortgage loans \| 80 to 100 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	0		0
Year 2	0		0
Year 3	0		0
Year 4	0		0
Year 5	0		10
Prior	56		48
Total	56		58
Commercial Loans \| Commercial mortgage loans \| 60 to 80 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	56		86
Year 2	83		44
Year 3	18		18
Year 4	12		9
Year 5	0		5
Prior	81		130
Total	250		292
Commercial Loans \| Commercial mortgage loans \| 40 to 60 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	102		87
Year 2	87		22
Year 3	42		39
Year 4	27		69
Year 5	70		41
Prior	349		348
Total	677		606
Commercial Loans \| Commercial mortgage loans \| Less than 40 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	37		15
Year 2	15		10
Year 3	11		48
Year 4	65		102
Year 5	102		50
Prior	765		706
Total	$ 995		$ 931

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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