Allowance and Carrying Value of Outstanding Loans and Leases by Portfolio Segment (Details) (USD $)
In Millions, unless otherwise specified |
Sep. 30, 2013
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Jun. 30, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Dec. 31, 2011
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Allowance for Loan and Lease Losses | $ 19,432 | $ 21,235 | $ 24,179 | $ 26,233 | $ 30,288 | $ 33,783 | ||||||||||||||
Carrying Value Gross of Valuation Allowance | 924,196 | [1],[2] | 898,817 | [1],[2] | ||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 2.10% | [2] | 2.69% | [2] | ||||||||||||||||
Loans Receivable, Fair Value Disclosure | 10,196 | 9,002 | ||||||||||||||||||
Impaired Loans and Troubled Debt Restructurings [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Allowance for Loan and Lease Losses | 2,415 | [3],[4] | 3,314 | [3],[4] | ||||||||||||||||
Carrying Value Gross of Valuation Allowance | 38,378 | [1],[4] | 39,077 | [1],[4] | ||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 6.29% | [4] | 8.48% | [4] | ||||||||||||||||
Collectively Evaluated For Impairment [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Allowance for Loan and Lease Losses | 13,783 | 15,329 | ||||||||||||||||||
Carrying Value Gross of Valuation Allowance | 858,650 | [1],[2] | 833,622 | [1],[2] | ||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 1.61% | [2] | 1.84% | [2] | ||||||||||||||||
Purchased Credit-Impaired Loans [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Allowance for Loan and Lease Losses | 3,234 | 5,536 | ||||||||||||||||||
Carrying Value Gross of Valuation Allowance | 27,168 | 26,118 | ||||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 11.90% | 21.20% | ||||||||||||||||||
Home Loans [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Allowance for Loan and Lease Losses | 10,513 | 12,396 | 14,933 | 16,534 | 19,964 | 21,079 | ||||||||||||||
Carrying Value Gross of Valuation Allowance | 350,149 | [1],[2] | 361,069 | [1],[2] | ||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 3.00% | [2] | 4.14% | [2] | ||||||||||||||||
Home Loans [Member] | Impaired Loans and Troubled Debt Restructurings [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Allowance for Loan and Lease Losses | 1,484 | [3],[4] | 1,700 | [3],[4] | ||||||||||||||||
Carrying Value Gross of Valuation Allowance | 32,606 | [1],[4] | 30,250 | [1],[4] | ||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 4.55% | [4] | 5.62% | [4] | ||||||||||||||||
Home Loans [Member] | Collectively Evaluated For Impairment [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Allowance for Loan and Lease Losses | 5,795 | 7,697 | ||||||||||||||||||
Carrying Value Gross of Valuation Allowance | 290,375 | [1],[2] | 304,701 | [1],[2] | ||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 2.00% | [2] | 2.53% | [2] | ||||||||||||||||
Home Loans [Member] | Purchased Credit-Impaired Loans [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Allowance for Loan and Lease Losses | 3,234 | 5,536 | ||||||||||||||||||
Carrying Value Gross of Valuation Allowance | 27,168 | 26,118 | ||||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 11.90% | 21.20% | ||||||||||||||||||
Credit Card and Other Consumer [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Allowance for Loan and Lease Losses | 5,430 | 5,671 | 6,140 | 6,521 | 7,024 | 8,569 | ||||||||||||||
Carrying Value Gross of Valuation Allowance | 187,311 | [1],[2] | 191,365 | [1],[2] | ||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 2.90% | [2] | 3.21% | [2] | ||||||||||||||||
Financing Receivable, Modifications, Recorded Investment | 2,416 | 3,946 | ||||||||||||||||||
Credit Card and Other Consumer [Member] | Impaired Loans and Troubled Debt Restructurings [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Allowance for Loan and Lease Losses | 645 | [3],[4] | 1,139 | [3],[4] | ||||||||||||||||
Carrying Value Gross of Valuation Allowance | 2,416 | [1],[4] | 3,946 | [1],[4] | ||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 26.70% | [4] | 28.86% | [4] | ||||||||||||||||
Credit Card and Other Consumer [Member] | Collectively Evaluated For Impairment [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Allowance for Loan and Lease Losses | 4,785 | 5,001 | ||||||||||||||||||
Carrying Value Gross of Valuation Allowance | 184,895 | [1],[2] | 187,419 | [1],[2] | ||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 2.59% | [2] | 2.67% | [2] | ||||||||||||||||
Commercial [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Allowance for Loan and Lease Losses | 3,489 | 3,168 | 3,106 | 3,178 | 3,300 | 4,135 | ||||||||||||||
Carrying Value Gross of Valuation Allowance | 386,736 | [1],[2] | 346,383 | [1],[2] | ||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 0.90% | [2] | 0.90% | [2] | ||||||||||||||||
Loans Receivable, Fair Value Disclosure | 8,010 | [5] | 7,997 | [6] | ||||||||||||||||
Commercial [Member] | Impaired Loans and Troubled Debt Restructurings [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Allowance for Loan and Lease Losses | 286 | [3],[4] | 475 | [3],[4] | ||||||||||||||||
Carrying Value Gross of Valuation Allowance | 3,356 | [1],[4] | 4,881 | [1],[4] | ||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 8.52% | [4] | 9.73% | [4] | ||||||||||||||||
Commercial [Member] | Collectively Evaluated For Impairment [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Allowance for Loan and Lease Losses | 3,203 | 2,631 | ||||||||||||||||||
Carrying Value Gross of Valuation Allowance | 383,380 | [1],[2] | 341,502 | [1],[2] | ||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 0.84% | [2] | 0.77% | [2] | ||||||||||||||||
Small Business Commercial Loan [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||||
Financing Receivable, Modifications, Recorded Investment | $ 45 | $ 97 | ||||||||||||||||||
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