Financing Receivables - Credit Quality Information - Syndicated Loans (Details) - USD ($)	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Financing receivables - credit quality information
Loan write-offs	$ 6,000,000	$ 3,000,000
Commercial Loans
Financing receivables - credit quality information
Loan write-offs	3,000,000	$ 2,000,000
Commercial Loans \| Syndicated loans
Financing receivables - credit quality information
Recorded investment	109,000,000		$ 145,000,000
Loan write-offs	0
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	54,000,000		42,000,000
Year 2	17,000,000		9,000,000
Year 3	1,000,000		44,000,000
Year 4	16,000,000		11,000,000
Year 5	3,000,000		25,000,000
Prior	18,000,000		14,000,000
Total	109,000,000		145,000,000
Commercial Loans \| Syndicated loans \| Risk 5
Financing receivables - credit quality information
Recorded investment	0		1,000,000
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	0		0
Year 2	0		1,000,000
Year 3	0		0
Year 4	0		0
Year 5	0		0
Prior	0		0
Total	0		1,000,000
Commercial Loans \| Syndicated loans \| Risk 4
Financing receivables - credit quality information
Recorded investment	2,000,000		3,000,000
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		1,000,000
Year 5	0		2,000,000
Prior	2,000,000		0
Total	2,000,000		3,000,000
Commercial Loans \| Syndicated loans \| Risk 3
Financing receivables - credit quality information
Recorded investment	14,000,000		28,000,000
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	1,000,000		2,000,000
Year 2	1,000,000		0
Year 3	0		12,000,000
Year 4	9,000,000		2,000,000
Year 5	1,000,000		2,000,000
Prior	2,000,000		10,000,000
Total	14,000,000		28,000,000
Commercial Loans \| Syndicated loans \| Risk 2
Financing receivables - credit quality information
Recorded investment	53,000,000		64,000,000
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	32,000,000		26,000,000
Year 2	7,000,000		3,000,000
Year 3	1,000,000		17,000,000
Year 4	4,000,000		5,000,000
Year 5	0		11,000,000
Prior	9,000,000		2,000,000
Total	53,000,000		64,000,000
Commercial Loans \| Syndicated loans \| Risk 1
Financing receivables - credit quality information
Recorded investment	40,000,000		49,000,000
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	21,000,000		14,000,000
Year 2	9,000,000		5,000,000
Year 3	0		15,000,000
Year 4	3,000,000		3,000,000
Year 5	2,000,000		10,000,000
Prior	5,000,000		2,000,000
Total	40,000,000		49,000,000
Commercial Loans \| Syndicated loans \| Past due
Financing receivables - credit quality information
Recorded investment	0		0
Amortized cost basis by year of origination and loan-to-value ratio
Total	$ 0		$ 0

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

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