Financing Receivables (Allowance for Loan Losses) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Rollforward of the allowance for loan losses
Beginning balance	$ 24	$ 26	$ 29
Charge-offs	(1)	(2)	(2)
Provisions	0	0	(1)
Ending balance	23	24	26
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	23	24	26
Recorded investment in financing receivables by impairment method and type of loan
Individually evaluated for impairment	17	24
Collectively evaluated for impairment	3,323	3,239
Total	3,340	3,263
Recorded investment in financing receivables individually evaluated for impairment with no related allowance for loan losses	17	24
Consumer loans [Member]
Recorded investment in financing receivables by impairment method and type of loan
Loans sold			267
Loss on sale of financing receivables			(7)
Syndicated loans [Member]
Recorded investment in financing receivables by impairment method and type of loan
Total	543	548
Loans purchased	162	221	$ 200
Loans sold	$ 54	$ 51

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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Amount of increase from purchase of financing receivable.

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Amount of decrease from sale and reclassification to held-for-sale of financing receivable.

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Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

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Reflects the net positive or negative amount derived from subtracting from net proceeds of sale and the carrying amounts, net of allocated reserves, of financial assets transferred to third parties in transactions that qualify for sales treatment.

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Amount, before allowance for credit loss, of financing receivable.

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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