Allowance and Carrying Value of Outstanding Loans and Leases by Portfolio Segment (Details) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||
Allowance for Loan and Lease Losses | $ 24,179 | $ 33,783 | $ 41,885 | $ 47,988 | ||||||||||||||
Carrying value | 898,817 | [1],[2] | 917,396 | [1],[2] | ||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 2.69% | [1] | 3.68% | [1] | ||||||||||||||
Loans Receivable, Fair Value Disclosure | 9,002 | 8,804 | ||||||||||||||||
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 | 3,157 | [3],[4] | 4,901 | [3],[4] | ||||||||||||||
Carrying value | 39,012 | [2],[3] | 36,675 | [2],[3] | ||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 8.09% | [3] | 13.36% | [3] | ||||||||||||||
Collectively Evaluated For Impairment [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||
Allowance for Loan and Lease Losses | 15,486 | 20,423 | ||||||||||||||||
Carrying value | 833,687 | [1],[2] | 848,920 | [1],[2] | ||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 1.86% | [1] | 2.41% | [1] | ||||||||||||||
Purchased Credit-Impaired Loans [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||
Allowance for Loan and Lease Losses | 5,536 | 8,459 | 6,400 | |||||||||||||||
Carrying value | 26,118 | 31,801 | ||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 21.20% | 26.60% | ||||||||||||||||
Home Loans [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||
Allowance for Loan and Lease Losses | 14,933 | 21,079 | 19,252 | 16,329 | ||||||||||||||
Carrying value | 361,069 | [1],[2] | 398,084 | [1],[2] | ||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 4.14% | [1] | 5.30% | [1] | ||||||||||||||
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 | 1,700 | [3],[4] | 1,946 | [3],[4] | ||||||||||||||
Carrying value | 30,250 | [2],[3] | 21,462 | [2],[3] | ||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 5.62% | [3] | 9.07% | [3] | ||||||||||||||
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 | 7,697 | 10,674 | ||||||||||||||||
Carrying value | 304,701 | [1],[2] | 344,821 | [1],[2] | ||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 2.53% | [1] | 3.10% | [1] | ||||||||||||||
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 | 5,536 | 8,459 | ||||||||||||||||
Carrying value | 26,118 | 31,801 | ||||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 21.20% | 26.60% | ||||||||||||||||
Consumer Portfolio Segment [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||
Allowance for Loan and Lease Losses | 6,140 | 8,569 | 15,463 | 22,243 | ||||||||||||||
Carrying value | 191,365 | [1],[2] | 209,110 | [1],[2] | ||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 3.21% | [1] | 4.10% | [1] | ||||||||||||||
Consumer Portfolio Segment [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 | 1,127 | [3],[4] | 2,410 | [3],[4] | ||||||||||||||
Carrying value | 3,881 | [2],[3] | 7,100 | [2],[3] | ||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 29.04% | [3] | 33.94% | [3] | ||||||||||||||
Consumer Portfolio Segment [Member] | Collectively Evaluated For Impairment [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||
Allowance for Loan and Lease Losses | 5,013 | 6,159 | ||||||||||||||||
Carrying value | 187,484 | [1],[2] | 202,010 | [1],[2] | ||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 2.67% | [1] | 3.05% | [1] | ||||||||||||||
Commercial [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||
Allowance for Loan and Lease Losses | 3,106 | 4,135 | 7,170 | 9,416 | ||||||||||||||
Carrying value | 346,383 | [1],[2] | 310,202 | [1],[2] | ||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 0.90% | [1] | 1.33% | [1] | ||||||||||||||
Loans Receivable, Fair Value Disclosure | 7,997 | [5] | 6,614 | [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 | 330 | [3],[4] | 545 | [3],[4] | ||||||||||||||
Carrying value | 4,881 | [2],[3] | 8,113 | [2],[3] | ||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 6.76% | [3] | 6.71% | [3] | ||||||||||||||
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 | 2,776 | 3,590 | ||||||||||||||||
Carrying value | 341,502 | [1],[2] | 302,089 | [1],[2] | ||||||||||||||
Valuation Allowance As A Percentage Of Carrying Value | 0.81% | [1] | 1.19% | [1] | ||||||||||||||
Small Business Commercial Loan [Member]
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Carrying Value of Outstanding Loans and Leases [Abstract] | ||||||||||||||||||
Financing Receivable, Modifications, Recorded Investment | $ 97 | $ 172 | ||||||||||||||||
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