Financing Receivables - Credit Quality - Commercial Mortgage Loans by LTV Ratio and Year of Origination (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Amortized cost basis by year of origination and loan-to-value ratio
Loan write-offs	$ 1	$ 2
Commercial Loans
Amortized cost basis by year of origination and loan-to-value ratio
Loan write-offs	0	$ 1
Commercial Loans \| Commercial mortgage loans
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	66		$ 188
Year 2	187		76
Year 3	72		105
Year 4	105		180
Year 5	178		106
Prior	1,336		1,247
Total	1,944		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	57		48
Total	57		58
Commercial Loans \| Commercial mortgage loans \| 60 to 80 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	17		86
Year 2	83		44
Year 3	35		18
Year 4	18		9
Year 5	6		5
Prior	126		130
Total	285		292
Commercial Loans \| Commercial mortgage loans \| 40 to 60 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	36		87
Year 2	89		22
Year 3	30		39
Year 4	40		69
Year 5	72		41
Prior	387		348
Total	654		606
Commercial Loans \| Commercial mortgage loans \| Less than 40 Percent
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	13		15
Year 2	15		10
Year 3	7		48
Year 4	47		102
Year 5	100		50
Prior	751		706
Total	$ 933		$ 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
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
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-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

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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