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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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12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2012
Interest Rate Contract [Member]
Minimum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Interest Rate Contract [Member]
Maximum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Interest Rate Contract [Member]
Weighted Average [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Derivative Loan Commitments [Member]
Minimum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Derivative Loan Commitments [Member]
Maximum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Derivative Loan Commitments [Member]
Weighted Average [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Equity Contract [Member]
Minimum [Member]
Option model [Member]
|
Dec. 31, 2012
Equity Contract [Member]
Maximum [Member]
Option model [Member]
|
Dec. 31, 2012
Equity Contract [Member]
Weighted Average [Member]
Option model [Member]
|
Dec. 31, 2012
Credit Contract [Member]
Minimum [Member]
Market comparable pricing [Member]
|
Dec. 31, 2012
Credit Contract [Member]
Minimum [Member]
Option model [Member]
|
Dec. 31, 2012
Credit Contract [Member]
Maximum [Member]
Market comparable pricing [Member]
|
Dec. 31, 2012
Credit Contract [Member]
Maximum [Member]
Option model [Member]
|
Dec. 31, 2012
Credit Contract [Member]
Weighted Average [Member]
Market comparable pricing [Member]
|
Dec. 31, 2012
Credit Contract [Member]
Weighted Average [Member]
Option model [Member]
|
Dec. 31, 2012
Government, healthcare and other revenue bonds [Member]
Minimum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Government, healthcare and other revenue bonds [Member]
Maximum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Government, healthcare and other revenue bonds [Member]
Weighted Average [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Auction Rate Securities [Member]
Minimum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Auction Rate Securities [Member]
Maximum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Auction Rate Securities [Member]
Weighted Average [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Collateralized debt obligations [Member]
Minimum [Member]
Market comparable pricing [Member]
|
Dec. 31, 2012
Collateralized debt obligations [Member]
Maximum [Member]
Market comparable pricing [Member]
|
Dec. 31, 2012
Collateralized debt obligations [Member]
Weighted Average [Member]
Market comparable pricing [Member]
|
Dec. 31, 2012
Auto loans and leases [Member]
Minimum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Auto loans and leases [Member]
Maximum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Auto loans and leases [Member]
Weighted Average [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Dealer Floorplan [Member]
Minimum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Dealer Floorplan [Member]
Maximum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Dealer Floorplan [Member]
Weighted Average [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Diversified Payment Rights [Member]
Minimum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Diversified Payment Rights [Member]
Maximum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Diversified Payment Rights [Member]
Weighted Average [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Other Commercial and Consumer [Member]
Minimum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Other Commercial and Consumer [Member]
Maximum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Other Commercial and Consumer [Member]
Weighted Average [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Perpetual preferred securities [Member]
Minimum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Perpetual preferred securities [Member]
Maximum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Perpetual preferred securities [Member]
Weighted Average [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Mortgages held for sale [Member]
Minimum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Mortgages held for sale [Member]
Maximum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Mortgages held for sale [Member]
Weighted Average [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Loans Receivable [Member]
Minimum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Loans Receivable [Member]
Maximum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Loans Receivable [Member]
Weighted Average [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Residential Mortgage Servicing [Member]
Minimum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Residential Mortgage Servicing [Member]
Maximum [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Residential Mortgage Servicing [Member]
Weighted Average [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Recurring [Member]
|
Dec. 31, 2011
Recurring [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
|
Dec. 31, 2011
Level 3 [Member]
Recurring [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Interest Rate Contract [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Derivative Loan Commitments [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Equity Contract [Member]
Option model [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Credit Contract [Member]
Market comparable pricing [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Credit Contract [Member]
Option model [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Government, healthcare and other revenue bonds [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Auction Rate Securities [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Collateralized debt obligations [Member]
Market comparable pricing [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Collateralized debt obligations [Member]
Vendor priced [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Auto loans and leases [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Dealer Floorplan [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Diversified Payment Rights [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Other Commercial and Consumer [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Other Commercial and Consumer [Member]
Vendor priced [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Perpetual preferred securities [Member]
Discounted cash flow [Member]
|
Dec. 31, 2012
Level 3 [Member]
Recurring [Member]
Residential Mortgage Servicing [Member]
Discounted cash flow [Member]
|
|
| Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Trading and available for sale securities | $ 3,081,000,000 | $ 596,000,000 | $ 1,423,000,000 | $ 12,507,000,000 | $ 5,921,000,000 | $ 1,030,000,000 | $ 639,000,000 | $ 1,665,000,000 | $ 87,000,000 | $ 794,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mortgages held for sale, carried at fair value | 42,305,000,000 | 44,791,000,000 | 42,305,000,000 | 44,791,000,000 | 3,250,000,000 | 3,410,000,000 | 3,250,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Loans | 6,206,000,000 | 5,916,000,000 | 6,206,000,000 | 5,916,000,000 | 6,021,000,000 | 23,000,000 | 6,021,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| MSRs (carried at fair value) | 11,538,000,000 | 12,603,000,000 | 11,538,000,000 | 12,603,000,000 | 11,538,000,000 | 12,603,000,000 | 11,538,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net derivative assets and liabilities | 162,000,000 | 497,000,000 | (122,000,000) | (1,157,000,000) | 8,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total insignificant level 3 assets, net of liabilities | 835,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total level 3 assets, net of liabilities | 48,775,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Inputs [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Discount rate | 0.50% | 4.80% | 1.80% | 2.00% | 12.90% | 4.40% | 0.60% | 1.60% | 1.00% | 0.50% | 2.20% | 1.90% | 1.00% | 2.90% | 1.80% | 0.60% | 6.80% | 2.70% | 4.30% | 9.30% | 6.30% | 3.40% | 7.50% | 5.40% | 2.40% | 2.80% | 2.60% | 6.70% | 10.90% | 7.40% | |||||||||||||||||||||||||||||||||||||||||
| Prepayment rate | 7.40% | 15.60% | 14.90% | 0.60% | 0.90% | 0.70% | 1.00% | 11.00% | 6.20% | 1.60% | 44.40% | 11.60% | 7.30% | 23.70% | 15.70% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Loss severity | 45.80% | 83.20% | 51.60% | 16.50% | 87.50% | 52.30% | 50.00% | 66.60% | 51.80% | 1.30% | 35.30% | 26.40% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comparability adjustment | (34.40%) | 30.50% | 0.10% | (22.50%) | 24.70% | 3.50% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Default rate | 0.00% | 20.00% | 5.40% | 2.10% | 9.70% | 3.20% | 0.60% | 14.80% | 5.50% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Volatility factor | 3.00% | 68.90% | 26.50% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Weighted average life | 3 years | 7 years 6 months 7 days | 3 years 4 months 28 days | 1 year | 7 years 6 months 7 days | 2 years 10 months 26 days | 1 year | 7 years | 5 years 3 months 22 days | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cost to service per loan | $ 90 | $ 854 | $ 219 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fall-out factor | 1.00% | 99.00% | 22.90% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Initial-value servicing (in bps) | (13.7) | 137.2 | 85.6 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Correlation factor | (43.60%) | 94.50% | 50.30% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Credit spread | 0.10% | 14.00% | 2.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Utilization rate | 0.00% | 2.00% | 0.80% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||