Fair Value Measurements (Details 5) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Real estate secured receivables held for sale at fair value [Member]
Fair value of assets and liabilities on recurring basis
Assets, Fair Value Disclosure, Nonrecurring	$ 3,287
Fair Value Measurements, Valuation Techniques	Third party appraisal valuation based on estimated loss severities, including collateral values, cash flows and market discount rate
Real estate secured receivables held for sale at fair value [Member] | Minimum [Member]
Fair value of assets and liabilities on recurring basis
Fair Value Inputs, Loss severity Rate	25.00%
Real estate secured receivables held for sale at fair value [Member] | Maximum [Member]
Fair value of assets and liabilities on recurring basis
Fair Value Inputs, Loss severity Rate	75.00%
Personal non-credit card receivables held for sale at fair value [Member]
Fair value of assets and liabilities on recurring basis
Assets, Fair Value Disclosure, Nonrecurring	$ 3,469
Fair Value Measurements, Valuation Techniques	Third party appraisal valuation based on estimated loss rates, cash flows and market discount rate
Personal non-credit card receivables held for sale at fair value [Member] | Minimum [Member]
Fair value of assets and liabilities on recurring basis
Fair Value Inputs, Loss severity Rate	13.00%
Personal non-credit card receivables held for sale at fair value [Member] | Maximum [Member]
Fair value of assets and liabilities on recurring basis
Fair Value Inputs, Loss severity Rate	21.00%
Market Discount Rate [Member] | Real estate secured receivables held for sale at fair value [Member] | Minimum [Member]
Fair value of assets and liabilities on recurring basis
Fair Value Inputs, Loss severity Rate	10.00%
Market Discount Rate [Member] | Real estate secured receivables held for sale at fair value [Member] | Maximum [Member]
Fair value of assets and liabilities on recurring basis
Fair Value Inputs, Loss severity Rate	15.00%
Market Discount Rate [Member] | Personal non-credit card receivables held for sale at fair value [Member] | Minimum [Member]
Fair value of assets and liabilities on recurring basis
Fair Value Inputs, Loss severity Rate	10.00%
Market Discount Rate [Member] | Personal non-credit card receivables held for sale at fair value [Member] | Maximum [Member]
Fair value of assets and liabilities on recurring basis
Fair Value Inputs, Loss severity Rate	15.00%