Receivables Held For Sale - Allowance for Credit Losses Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 0	$ 329	$ 1,452
Initial valuation allowance for real estate secured receivables transferred to held for sale during the period	0	113	212
Increase in (release of) valuation allowance resulting from changes in fair value	130	(314)	(748)
Valuation allowance on real estate secured receivables transferred to held for investment	0	(10)	0
Change in valuation allowance for loans sold	(144)	149	(183)
Change in valuation allowance for collections, charged-off, transferred to REO or short sale	27	(267)	(404)
Balance at end of period	$ 13	$ 0	$ 329

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 Loan and Leases Held-For-Sale, Transfers to Held-For-Investment

No definition available.

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Allowance for Loans and Lease Losses Held-for-Sale, Period Increase (Decrease) to Valuation Allowance for Loans Sold

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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