|
Fair Value Measurements Fair Value Measurements Nonrecurring Fair Value Inputs (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2012
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Inputs, Level 3 [Member]
|
Dec. 31, 2011
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Inputs, Level 3 [Member]
|
Dec. 31, 2012
Fair Value, Measurements, Nonrecurring [Member]
Instruments Backed by Commercial Real Estate Assets [Member]
Loans and Securities [Member]
Fair Value, Inputs, Level 3 [Member]
Discounted Cash Flow [Member]
|
Dec. 31, 2012
Fair Value, Measurements, Nonrecurring [Member]
Instruments Backed by Residential Real Estate Assets [Member]
Loans and Securities [Member]
Fair Value, Inputs, Level 3 [Member]
Discounted Cash Flow Market Comparables [Member]
|
Dec. 31, 2012
Maximum [Member]
Fair Value, Measurements, Nonrecurring [Member]
Instruments Backed by Commercial Real Estate Assets [Member]
Loans and Securities [Member]
Fair Value, Inputs, Level 3 [Member]
Discounted Cash Flow [Member]
|
Dec. 31, 2012
Maximum [Member]
Fair Value, Measurements, Nonrecurring [Member]
Instruments Backed by Residential Real Estate Assets [Member]
Loans and Securities [Member]
Fair Value, Inputs, Level 3 [Member]
Discounted Cash Flow Market Comparables [Member]
|
Dec. 31, 2012
Minimum [Member]
Fair Value, Measurements, Nonrecurring [Member]
Instruments Backed by Commercial Real Estate Assets [Member]
Loans and Securities [Member]
Fair Value, Inputs, Level 3 [Member]
Discounted Cash Flow [Member]
|
Dec. 31, 2012
Minimum [Member]
Fair Value, Measurements, Nonrecurring [Member]
Instruments Backed by Residential Real Estate Assets [Member]
Loans and Securities [Member]
Fair Value, Inputs, Level 3 [Member]
Discounted Cash Flow Market Comparables [Member]
|
|
| Fair Value Inputs, Assets And Liabilities, Quantitative Information [Line Items] | ||||||||||
| Loans and Securities Fair Value Disclosure | $ 388 | $ 9,932 | ||||||||
| Loans held-for-sale | 11,659 | 7,630 | 1,136 | 1,008 | 388 | 748 | ||||
| Loans And Leases Fair Value Disclosure | $ 9,184 | $ 10,629 | $ 9,184 | |||||||
| Fair Value Inputs Yield | 13.00% | 5.00% | 4.00% | 3.00% | ||||||
| Fair Value Inputs, Prepayment Rate | 30.00% | 3.00% | ||||||||
| Fair Value Inputs, Probability of Default | 55.00% | 0.00% | ||||||||
| Fair Value Inputs, Loss Severity | 88.00% | 66.00% | 24.00% | 6.00% | ||||||
| Fair Value Inputs, Discount Rate | 28.00% | 0.00% | ||||||||
| Fair Value Inputs, Cost to Sell | 8.00% | |||||||||
| Fair Value Inputs Yield, Weighted Average | 6.00% | 3.00% | ||||||||
| Fair Value Inputs, Prepayment Rate, Weighted Average | 15.00% | |||||||||
| Fair Value Inputs, Probability of Default, Weighted Average | 7.00% | |||||||||
| Fair Value Inputs, Loss Severity, Weighted Average | 53.00% | 48.00% | ||||||||
| Fair Value Inputs, Discount Rate, Weighted Average | 15.00% | |||||||||