Financing Receivables - Credit Quality - Commercial Mortgage Loans by LTV Ratio and Year of Origination (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Amortized cost basis by year of origination and loan-to-value ratio
Loan write-offs	$ 4	$ 4	$ 10
Commercial Loans
Amortized cost basis by year of origination and loan-to-value ratio
Loan write-offs	2	3	$ 8
Commercial Loans \| Commercial mortgage loans
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	77	112
Originated in fiscal year before latest fiscal year	110	197
Originated two years before latest fiscal year	188	120
Originated three years before latest fiscal year	109	210
Originated four years before latest fiscal year	203	162
Originated five or more years before latest fiscal year	1,145	1,081
Total	1,832	1,882
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	2
Originated three years before latest fiscal year	0	2
Originated four years before latest fiscal year	2	3
Originated five or more years before latest fiscal year	22	39
Total	24	46
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	7
Originated in fiscal year before latest fiscal year	5	9
Originated two years before latest fiscal year	0	2
Originated three years before latest fiscal year	2	20
Originated four years before latest fiscal year	11	8
Originated five or more years before latest fiscal year	50	29
Total	68	75
Commercial Loans \| Commercial mortgage loans \| 60% - 80%
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	59	39
Originated in fiscal year before latest fiscal year	26	87
Originated two years before latest fiscal year	6	17
Originated three years before latest fiscal year	14	52
Originated four years before latest fiscal year	40	9
Originated five or more years before latest fiscal year	106	107
Total	251	311
Commercial Loans \| Commercial mortgage loans \| 40% - 60%
Amortized cost basis by year of origination and loan-to-value ratio
Originated in current fiscal year	8	48
Originated in fiscal year before latest fiscal year	47	89
Originated two years before latest fiscal year	133	69
Originated three years before latest fiscal year	53	90
Originated four years before latest fiscal year	70	57
Originated five or more years before latest fiscal year	348	435
Total	659	788
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	10	18
Originated in fiscal year before latest fiscal year	32	12
Originated two years before latest fiscal year	49	30
Originated three years before latest fiscal year	40	46
Originated four years before latest fiscal year	80	85
Originated five or more years before latest fiscal year	619	471
Total	$ 830	$ 662

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
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Topic 326
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