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Fair Value, Assets and Liabilities Measured on a Recurring Basis Level 3 Valuation Techniques and Significant Unobservable Inputs (Details) (USD $)
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3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Mar. 31, 2012
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Dec. 31, 2011
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Mar. 31, 2012
Interest Rate Contract [Member]
Discounted cash flow [Member]
Minimum [Member]
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Mar. 31, 2012
Interest Rate Contract [Member]
Discounted cash flow [Member]
Maximum [Member]
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Mar. 31, 2012
Interest Rate Contract [Member]
Discounted cash flow [Member]
Weighted Average [Member]
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Mar. 31, 2012
Derivative Loan Commitments [Member]
Discounted cash flow [Member]
Minimum [Member]
bps
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Mar. 31, 2012
Derivative Loan Commitments [Member]
Discounted cash flow [Member]
Maximum [Member]
bps
|
Mar. 31, 2012
Derivative Loan Commitments [Member]
Discounted cash flow [Member]
Weighted Average [Member]
bps
|
Mar. 31, 2012
Equity Contract [Member]
Option model [Member]
Minimum [Member]
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Mar. 31, 2012
Equity Contract [Member]
Option model [Member]
Maximum [Member]
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Mar. 31, 2012
Equity Contract [Member]
Option model [Member]
Weighted Average [Member]
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Mar. 31, 2012
Credit Contract [Member]
Market comparable pricing [Member]
Minimum [Member]
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Mar. 31, 2012
Credit Contract [Member]
Market comparable pricing [Member]
Maximum [Member]
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Mar. 31, 2012
Credit Contract [Member]
Market comparable pricing [Member]
Weighted Average [Member]
|
Mar. 31, 2012
Credit Contract [Member]
Option model [Member]
Minimum [Member]
|
Mar. 31, 2012
Credit Contract [Member]
Option model [Member]
Maximum [Member]
|
Mar. 31, 2012
Credit Contract [Member]
Option model [Member]
Weighted Average [Member]
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Mar. 31, 2012
Government, healthcare and other revenue bonds [Member]
Discounted cash flow [Member]
Minimum [Member]
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Mar. 31, 2012
Government, healthcare and other revenue bonds [Member]
Discounted cash flow [Member]
Maximum [Member]
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Mar. 31, 2012
Government, healthcare and other revenue bonds [Member]
Discounted cash flow [Member]
Weighted Average [Member]
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Mar. 31, 2012
Auction Rate Securities [Member]
Discounted cash flow [Member]
Minimum [Member]
years
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Mar. 31, 2012
Auction Rate Securities [Member]
Discounted cash flow [Member]
Maximum [Member]
years
|
Mar. 31, 2012
Auction Rate Securities [Member]
Discounted cash flow [Member]
Weighted Average [Member]
years
|
Mar. 31, 2012
Collateralized debt obligations [Member]
Market comparable pricing [Member]
Minimum [Member]
|
Mar. 31, 2012
Collateralized debt obligations [Member]
Market comparable pricing [Member]
Maximum [Member]
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Mar. 31, 2012
Collateralized debt obligations [Member]
Market comparable pricing [Member]
Weighted Average [Member]
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Mar. 31, 2012
Auto loans and leases [Member]
Discounted cash flow [Member]
Minimum [Member]
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Mar. 31, 2012
Auto loans and leases [Member]
Discounted cash flow [Member]
Maximum [Member]
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Mar. 31, 2012
Auto loans and leases [Member]
Discounted cash flow [Member]
Weighted Average [Member]
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Mar. 31, 2012
Dealer Floorplan [Member]
Discounted cash flow [Member]
Minimum [Member]
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Mar. 31, 2012
Dealer Floorplan [Member]
Discounted cash flow [Member]
Maximum [Member]
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Mar. 31, 2012
Dealer Floorplan [Member]
Discounted cash flow [Member]
Weighted Average [Member]
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Mar. 31, 2012
Other Commercial and Consumer [Member]
Discounted cash flow [Member]
Minimum [Member]
years
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Mar. 31, 2012
Other Commercial and Consumer [Member]
Discounted cash flow [Member]
Maximum [Member]
years
|
Mar. 31, 2012
Other Commercial and Consumer [Member]
Discounted cash flow [Member]
Weighted Average [Member]
years
|
Mar. 31, 2012
Perpetual preferred securities [Member]
Discounted cash flow [Member]
Minimum [Member]
years
|
Mar. 31, 2012
Perpetual preferred securities [Member]
Discounted cash flow [Member]
Maximum [Member]
years
|
Mar. 31, 2012
Perpetual preferred securities [Member]
Discounted cash flow [Member]
Weighted Average [Member]
years
|
Mar. 31, 2012
Mortgages held for sale [Member]
Discounted cash flow [Member]
Minimum [Member]
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Mar. 31, 2012
Mortgages held for sale [Member]
Discounted cash flow [Member]
Maximum [Member]
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Mar. 31, 2012
Mortgages held for sale [Member]
Discounted cash flow [Member]
Weighted Average [Member]
|
Mar. 31, 2012
Residential Mortgage Servicing [Member]
Discounted cash flow [Member]
Minimum [Member]
|
Mar. 31, 2012
Residential Mortgage Servicing [Member]
Discounted cash flow [Member]
Maximum [Member]
|
Mar. 31, 2012
Residential Mortgage Servicing [Member]
Discounted cash flow [Member]
Weighted Average [Member]
|
Mar. 31, 2012
Fair Value, Measurements, Recurring [Member]
|
Dec. 31, 2011
Fair Value, Measurements, Recurring [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
|
Dec. 31, 2011
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Discounted cash flow [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Interest Rate Contract [Member]
Discounted cash flow [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Derivative Loan Commitments [Member]
Discounted cash flow [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Equity Contract [Member]
Option model [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Credit Contract [Member]
Market comparable pricing [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Credit Contract [Member]
Option model [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Credit Contract [Member]
Vendor priced [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Government, healthcare and other revenue bonds [Member]
Discounted cash flow [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Government, healthcare and other revenue bonds [Member]
Vendor priced [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Auction Rate Securities [Member]
Discounted cash flow [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Collateralized debt obligations [Member]
Market comparable pricing [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Collateralized debt obligations [Member]
Vendor priced [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Auto loans and leases [Member]
Discounted cash flow [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Dealer Floorplan [Member]
Discounted cash flow [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Other Commercial and Consumer [Member]
Discounted cash flow [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Other Commercial and Consumer [Member]
Vendor priced [Member]
|
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Perpetual preferred securities [Member]
Discounted cash flow [Member]
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|
| Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Trading and available for sale securities | $ 10,945,000,000 | $ 997,000,000 | $ 675,000,000 | $ 2,198,000,000 | $ 8,504,000,000 | $ 6,913,000,000 | $ 589,000,000 | $ 2,115,000,000 | $ 329,000,000 | $ 1,173,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mortgages held for sale, carried at fair value | 39,183,000,000 | 44,791,000,000 | 39,183,000,000 | 44,791,000,000 | 3,330,000,000 | 3,410,000,000 | 3,330,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| MSRs (carried at fair value) | 13,578,000,000 | 12,603,000,000 | 13,578,000,000 | 12,603,000,000 | 13,578,000,000 | 12,603,000,000 | 13,578,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net derivative assets and liabilities | 119,000,000 | 216,000,000 | (180,000,000) | (1,783,000,000) | 10,000,000 | 20,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total insignificant level 3 assets, net of liabilities | 1,302,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total level 3 assets, net of liabilities | 51,050,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Inputs [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Discount rate | 0.40% | 4.20% | 1.30% | 3.30% | 14.30% | 5.30% | 0.50% | 2.10% | 1.30% | 1.10% | 1.30% | 1.20% | 0.80% | 20.00% | 4.30% | 5.40% | 8.30% | 6.30% | 3.80% | 7.30% | 5.50% | 6.70% | 10.80% | 7.50% | |||||||||||||||||||||||||||||||||||||||||
| Prepayment rate | 7.30% | 22.90% | 15.30% | 0.40% | 1.30% | 0.70% | 1.00% | 15.60% | 6.80% | 7.10% | 23.10% | 14.50% | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Loss severity | 32.30% | 89.40% | 52.30% | 10.00% | 60.00% | 41.40% | 50.00% | 66.70% | 53.50% | 1.00% | 40.30% | 29.30% | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comparability adjustment | (38.90%) | 39.30% | 0.10% | (25.00%) | 22.00% | (0.40%) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Default rate | 0.00% | 14.30% | 4.90% | 1.20% | 10.50% | 3.80% | 2.20% | 19.70% | 10.80% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Volatility factor | 12.00% | 55.00% | 28.40% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Weighted average life | 3.0 | 14.6 | 3.9 | 0.4 | 9.8 | 3.7 | 1.0 | 10.0 | 4.5 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cost to service per loan | $ 82 | $ 926 | $ 210 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fall-out factor | 1.00% | 99.00% | 22.40% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Initial-value servicing | (3.7) | 114.4 | 68.7 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Correlation factor | 40.30% | 84.30% | 67.70% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Credit spread | 0.00% | 15.30% | 2.60% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||