Receivables Held For Sale - Allowance for Credit Losses Rollforward (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 174	$ 13
Initial valuation allowance for real estate secured receivables transferred to held for sale during the period	0	4
Increase (decrease) in valuation allowance resulting from changes in fair value	(108)	68
Change in valuation allowance for collections, charged-off, transferred to REO or short sale	(5)	1
Balance at end of period	$ 61	$ 86

Allowance for Loan and Lease Losses Held-for-Sale, Fair Value Adjustments

No definition available.

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Allowance for Loan and Lease Losses Held-for-Sale, Transfer Made to Held-for-Sale Loans, Adjustment

No definition available.

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Allowance for Loans and Lease Losses Held-for-Sale, Recovery of Bad Debts, Write-offs, Transfers

No definition available.

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Loans and Leases Receivable Held for Sale Valuation Allowance

No definition available.

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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.

No definition available.

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