Financing Receivables - Credit Quality Information - Syndicated Loans (Details) - Commercial Loans - Syndicated loans - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Financing receivables - credit quality information
Recorded investment	$ 152	$ 595
Amortized cost basis by year of origination and loan-to-value ratio
Originated in Current Fiscal Year	25	47
Originated in Fiscal Year before Latest Fiscal Year	8	98
Originated Two Years before Latest Fiscal Year	21	121
Originated Three Years before Latest Fiscal Year	25	161
Originated Four Years before Latest Fiscal Year	38	49
Originated Five or More Years before Latest Fiscal Year	35	119
Total amortized cost basis	152	595
Risk 5
Amortized cost basis by year of origination and loan-to-value ratio
Originated Five or More Years before Latest Fiscal Year		3
Total amortized cost basis		3
Risk 4
Amortized cost basis by year of origination and loan-to-value ratio
Originated Two Years before Latest Fiscal Year	1	4
Originated Three Years before Latest Fiscal Year	1	9
Originated Four Years before Latest Fiscal Year	1
Originated Five or More Years before Latest Fiscal Year	1	10
Total amortized cost basis	4	23
Risk 3
Amortized cost basis by year of origination and loan-to-value ratio
Originated in Fiscal Year before Latest Fiscal Year		9
Originated Two Years before Latest Fiscal Year	4	8
Originated Three Years before Latest Fiscal Year	4	25
Originated Four Years before Latest Fiscal Year	5	13
Originated Five or More Years before Latest Fiscal Year	9	25
Total amortized cost basis	22	80
Risk 2
Amortized cost basis by year of origination and loan-to-value ratio
Originated in Current Fiscal Year	16	30
Originated in Fiscal Year before Latest Fiscal Year	5	57
Originated Two Years before Latest Fiscal Year	9	62
Originated Three Years before Latest Fiscal Year	11	69
Originated Four Years before Latest Fiscal Year	16	14
Originated Five or More Years before Latest Fiscal Year	9	41
Total amortized cost basis	66	273
Risk 1
Amortized cost basis by year of origination and loan-to-value ratio
Originated in Current Fiscal Year	9	17
Originated in Fiscal Year before Latest Fiscal Year	3	32
Originated Two Years before Latest Fiscal Year	7	47
Originated Three Years before Latest Fiscal Year	9	58
Originated Four Years before Latest Fiscal Year	16	22
Originated Five or More Years before Latest Fiscal Year	16	40
Total amortized cost basis	60	216
Past due
Financing receivables - credit quality information
Recorded investment	$ 0	$ 3

Amount excluding accrued interest, before allowance for credit loss, of financing receivable.

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Amount excluding accrued interest of financing receivable originated more than five years prior to current fiscal year.

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Amount excluding accrued interest of financing receivable originated four years prior to current fiscal year.

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Amount excluding accrued interest of financing receivable originated three years prior to current fiscal year.

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Amount excluding accrued interest of financing receivable originated in current fiscal year.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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