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Fair Value Measurements - Nonrecurring Fair Value Inputs (Details) (USD $)
In Millions, unless otherwise specified |
6 Months Ended | ||||||||||
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Jun. 30, 2012
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Dec. 31, 2011
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Jun. 30, 2012
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
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Jun. 30, 2011
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
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Jun. 30, 2012
Discounted Cash Flow Market Comparables [Member]
Loans and Securities [Member]
Instruments Backed by Residential Real Estate Assets [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
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Jun. 30, 2012
Discounted Cash Flow Market Comparables [Member]
Loans and Securities [Member]
Minimum [Member]
Instruments Backed by Residential Real Estate Assets [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
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Jun. 30, 2012
Discounted Cash Flow Market Comparables [Member]
Loans and Securities [Member]
Maximum [Member]
Instruments Backed by Residential Real Estate Assets [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
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| Fair Value, Option, Quantitative Disclosures [Line Items] | |||||||||||
| Loans and Securities Fair Value Disclosure | $ 8,041 | ||||||||||
| Loans Held-for-sale, Fair Value Disclosure | 10,187 | 7,630 | 1,139 | 1,779 | 1,139 | ||||||
| Loans and leases | $ 6,902 | [1] | $ 9,437 | [1] | $ 6,902 | ||||||
| Fair Value Inputs, Yield | 4.00% | 7.00% | |||||||||
| Fair Value Inputs, Prepayment Rate | 3.00% | 27.00% | |||||||||
| Fair Value Inputs, Probability of Default | 0.00% | 61.00% | |||||||||
| Fair Value Inputs, Loss Severity | 0.00% | 62.00% | |||||||||
| Fair Value Inputs, Discount Rate | 0.00% | 28.00% | |||||||||
| Fair Value Inputs, Cost to Sell | 8.00% | ||||||||||
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