Financing Receivables - Credit Quality - Commercial Mortgage Loans by LTV Ratio and Year of Origination (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Amortized cost basis by year of origination and loan-to-value ratio
Loan write-offs	$ 8	$ 4	$ 4
Commercial Loans
Amortized cost basis by year of origination and loan-to-value ratio
Loan write-offs	4	2	$ 3
Commercial Loans \| Commercial mortgage loans
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	188	77
Originated in fiscal year before latest fiscal year	76	110
Originated two years before latest fiscal year	105	188
Originated three years before latest fiscal year	180	109
Originated four years before latest fiscal year	106	203
Originated five or more years before latest fiscal year	1,247	1,145
Total	1,902	1,832
Loan write-offs	0
Commercial Loans \| Commercial mortgage loans \| > 100%
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	0	0
Originated in fiscal year before latest fiscal year	0	0
Originated two years before latest fiscal year	0	0
Originated three years before latest fiscal year	0	0
Originated four years before latest fiscal year	0	2
Originated five or more years before latest fiscal year	15	22
Total	15	24
Commercial Loans \| Commercial mortgage loans \| 80% - 100%
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	0	0
Originated in fiscal year before latest fiscal year	0	5
Originated two years before latest fiscal year	0	0
Originated three years before latest fiscal year	0	2
Originated four years before latest fiscal year	10	11
Originated five or more years before latest fiscal year	48	50
Total	58	68
Commercial Loans \| Commercial mortgage loans \| 60% - 80%
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	86	59
Originated in fiscal year before latest fiscal year	44	26
Originated two years before latest fiscal year	18	6
Originated three years before latest fiscal year	9	14
Originated four years before latest fiscal year	5	40
Originated five or more years before latest fiscal year	130	106
Total	292	251
Commercial Loans \| Commercial mortgage loans \| 40% - 60%
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	87	8
Originated in fiscal year before latest fiscal year	22	47
Originated two years before latest fiscal year	39	133
Originated three years before latest fiscal year	69	53
Originated four years before latest fiscal year	41	70
Originated five or more years before latest fiscal year	348	348
Total	606	659
Commercial Loans \| Commercial mortgage loans \| Less than 40%
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	15	10
Originated in fiscal year before latest fiscal year	10	32
Originated two years before latest fiscal year	48	49
Originated three years before latest fiscal year	102	40
Originated four years before latest fiscal year	50	80
Originated five or more years before latest fiscal year	706	619
Total	$ 931	$ 830

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
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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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