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Fair Value Measurements - Nonrecurring Fair Value Inputs (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 3 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2012
|
Dec. 31, 2011
|
Mar. 31, 2012
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
|
Mar. 31, 2011
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
|
Mar. 31, 2012
Loans and Securities [Member]
Instruments Backed by Residential Real Estate Assets [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
|
Mar. 31, 2012
Loans and Securities [Member]
Instruments Backed by Commercial Real Estate Assets [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
|
Mar. 31, 2012
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]
|
Mar. 31, 2012
Loans and Securities [Member]
Minimum [Member]
Instruments Backed by Commercial Real Estate Assets [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
|
Mar. 31, 2012
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]
|
Mar. 31, 2012
Loans and Securities [Member]
Maximum [Member]
Instruments Backed by Commercial 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 | $ 6,537 | $ 133 | ||||||||||||
| Loans Held-for-sale, Fair Value Disclosure | 7,558 | 7,630 | 857 | 5,043 | 724 | 133 | ||||||||
| Loans And Leases Fair Value Disclosure | $ 5,813 | [1] | $ 7,598 | [1] | $ 5,813 | |||||||||
| Fair Value Inputs, Yield | 4.00% | 4.00% | 7.00% | 15.00% | ||||||||||
| Fair Value Inputs, Prepayment Rate | 3.00% | 24.00% | ||||||||||||
| Fair Value Inputs, Probability of Default | 0.00% | 59.00% | ||||||||||||
| Fair Value Inputs, Loss Severity | 0.00% | 0.00% | 60.00% | 91.00% | ||||||||||
| Fair Value Inputs, Discount Rate | 1.00% | 28.00% | ||||||||||||
| Fair Value Inputs, Cost to Sell | 8.00% | |||||||||||||
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