Receivables Held For Sale - Allowance for Credit Losses Rollforward (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 0	$ 329
Initial valuation allowance for real estate secured receivables transferred to held for sale during the period	0	60
Increase in (release of) valuation allowance resulting from changes in fair value	17	(171)
Valuation allowance on real estate secured receivables transferred to held for investment	0	(4)
Change in valuation allowance for collections, charged-off, transferred to REO or short sale	(17)	(49)
Balance at end of period	$ 0	$ 165

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

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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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