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Allowance for Credit Losses (Details) (USD $)
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3 Months Ended | 3 Months Ended | ||||||||||||||||||||
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Mar. 31, 2014
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Mar. 31, 2013
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Mar. 31, 2014
Purchased Credit Impaired Loans [Member]
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Mar. 31, 2013
Purchased Credit Impaired Loans [Member]
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Mar. 31, 2014
Home Loans [Member]
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Mar. 31, 2013
Home Loans [Member]
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Mar. 31, 2014
Home Loans [Member]
Purchased Credit Impaired Loans [Member]
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Dec. 31, 2013
Home Loans [Member]
Purchased Credit Impaired Loans [Member]
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Mar. 31, 2014
Credit Card and Other Consumer [Member]
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Mar. 31, 2013
Credit Card and Other Consumer [Member]
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Mar. 31, 2014
Commercial [Member]
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Mar. 31, 2013
Commercial [Member]
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| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||||||||||||||||||||
| Allowance for Loan and Lease Losses, Loans Acquired | $ 0 | $ (207,000,000) | ||||||||||||||||||||
| Allowance for Loan and Lease Losses [Roll Forward] | ||||||||||||||||||||||
| Allowance for Loan and Lease Losses, January 1 | 17,428,000,000 | 24,179,000,000 | 2,493,000,000 | 8,518,000,000 | 14,933,000,000 | 2,102,000,000 | 2,493,000,000 | 4,905,000,000 | 6,140,000,000 | 4,005,000,000 | 3,106,000,000 | |||||||||||
| Loans and Leases Charged Off | (1,868,000,000) | (3,062,000,000) | (596,000,000) | (1,193,000,000) | (1,128,000,000) | (1,553,000,000) | (144,000,000) | (316,000,000) | ||||||||||||||
| Recoveries of Loans and Leases Previously Charged Off | 480,000,000 | 545,000,000 | 167,000,000 | 126,000,000 | 218,000,000 | 318,000,000 | 95,000,000 | 101,000,000 | ||||||||||||||
| Net Charge-Offs | (1,388,000,000) | (2,517,000,000) | (429,000,000) | (1,067,000,000) | (910,000,000) | (1,235,000,000) | (49,000,000) | (215,000,000) | ||||||||||||||
| Write-offs of PCI loans | (391,000,000) | (839,000,000) | (391,000,000) | (839,000,000) | ||||||||||||||||||
| Provision for Loan and Lease Losses | 984,000,000 | 1,731,000,000 | (141,000,000) | 484,000,000 | 791,000,000 | 1,007,000,000 | 334,000,000 | 240,000,000 | ||||||||||||||
| Other | (15,000,000) | [1] | (113,000,000) | [1] | (1,000,000) | [1] | (73,000,000) | [1] | (11,000,000) | [1] | (38,000,000) | [1] | (3,000,000) | [1] | (2,000,000) | [1] | ||||||
| Allowance for Loan and Lease Losses, ending balance | 16,618,000,000 | 22,441,000,000 | 2,102,000,000 | 7,556,000,000 | 13,438,000,000 | 2,102,000,000 | 2,493,000,000 | 4,775,000,000 | 5,874,000,000 | 4,287,000,000 | 3,129,000,000 | |||||||||||
| Reserve For Unfunded Lending Commitments, beginning balance | 484,000,000 | 513,000,000 | 484,000,000 | 513,000,000 | ||||||||||||||||||
| Provision for unfunded lending commitments | 25,000,000 | (18,000,000) | 25,000,000 | (18,000,000) | ||||||||||||||||||
| Other | (9,000,000) | (9,000,000) | ||||||||||||||||||||
| Reserve For Unfunded Lending Commitments, ending balance | 509,000,000 | 486,000,000 | 509,000,000 | 486,000,000 | ||||||||||||||||||
| Allowance For Credit Losses, March 31 | $ 17,127,000,000 | $ 22,927,000,000 | $ 7,556,000,000 | $ 13,438,000,000 | $ 4,775,000,000 | $ 5,874,000,000 | $ 4,796,000,000 | $ 3,615,000,000 | ||||||||||||||
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