Financing Receivables - Credit Quality Information - Syndicated Loans (Details) - USD ($)	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Financing receivables - credit quality information
Loan write-offs	$ 1,000,000	$ 2,000,000
Commercial Loans
Financing receivables - credit quality information
Loan write-offs	0	$ 1,000,000
Commercial Loans \| Syndicated loans
Financing receivables - credit quality information
Recorded investment	87,000,000		$ 92,000,000
Loan write-offs	0
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	14,000,000		52,000,000
Year 2	44,000,000		12,000,000
Year 3	12,000,000		0
Year 4	0		14,000,000
Year 5	5,000,000		3,000,000
Prior	12,000,000		11,000,000
Total	87,000,000		92,000,000
Commercial Loans \| Syndicated loans \| Risk 5
Financing receivables - credit quality information
Recorded investment	0		0
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	0		0
Total	0		0
Commercial Loans \| Syndicated loans \| Risk 4
Financing receivables - credit quality information
Recorded investment	2,000,000		2,000,000
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		0
Year 5	0		0
Prior	2,000,000		2,000,000
Total	2,000,000		2,000,000
Commercial Loans \| Syndicated loans \| Risk 3
Financing receivables - credit quality information
Recorded investment	10,000,000		12,000,000
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	5,000,000		1,000,000
Year 2	1,000,000		1,000,000
Year 3	1,000,000		0
Year 4	0		8,000,000
Year 5	2,000,000		1,000,000
Prior	1,000,000		1,000,000
Total	10,000,000		12,000,000
Commercial Loans \| Syndicated loans \| Risk 2
Financing receivables - credit quality information
Recorded investment	44,000,000		45,000,000
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	6,000,000		29,000,000
Year 2	22,000,000		5,000,000
Year 3	5,000,000		0
Year 4	0		3,000,000
Year 5	3,000,000		0
Prior	8,000,000		8,000,000
Total	44,000,000		45,000,000
Commercial Loans \| Syndicated loans \| Risk 1
Financing receivables - credit quality information
Recorded investment	31,000,000		33,000,000
Amortized cost basis by year of origination and loan-to-value ratio
Year 1	3,000,000		22,000,000
Year 2	21,000,000		6,000,000
Year 3	6,000,000		0
Year 4	0		3,000,000
Year 5	0		2,000,000
Prior	1,000,000		0
Total	31,000,000		33,000,000
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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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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