Securitizations and Other Variable Interest Entities - First Lien Mortgages VIE (Details) (USD $)
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Mar. 31, 2014
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Dec. 31, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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On Balance Sheet Assets [Abstract] | |||||||||||||||||
Loans and leases | $ 916,217,000,000 | $ 928,233,000,000 | |||||||||||||||
Allowance for loan and lease losses | (16,618,000,000) | (17,428,000,000) | (22,441,000,000) | (24,179,000,000) | |||||||||||||
All other Assets | 121,821,000,000 | 124,090,000,000 | |||||||||||||||
Total assets | 2,149,851,000,000 | [1] | 2,102,273,000,000 | [1] | 2,174,819,000,000 | [1] | |||||||||||
On Balance Sheet Liabilities [Abstract] | |||||||||||||||||
Long-term debt | 254,785,000,000 | 249,674,000,000 | |||||||||||||||
Total liabilities | 1,917,963,000,000 | 1,869,588,000,000 | |||||||||||||||
In Text Details [Abstract] | |||||||||||||||||
Unpaid principal balance of mortgage loans eligible for repurchase | 1,200,000,000 | 1,600,000,000 | |||||||||||||||
Principal amount that would be payable to the securitization vehicles | 1,200,000,000 | (1,600,000,000) | |||||||||||||||
Unconsolidated VIEs [Member] | Agency MBS [Member] | First Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | |||||||||||||||||
Maximum loss exposure | 17,298,000,000 | [2] | 21,140,000,000 | [2] | |||||||||||||
On Balance Sheet Assets [Abstract] | |||||||||||||||||
Residual interests held | 0 | 0 | |||||||||||||||
All other Assets | 998,000,000 | [3] | 1,039,000,000 | [3] | |||||||||||||
Total assets | 17,298,000,000 | 21,140,000,000 | |||||||||||||||
Principal balance outstanding | 430,508,000,000 | [4] | 437,765,000,000 | [4] | |||||||||||||
Unconsolidated VIEs [Member] | Prime Loan [Member] | First Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | |||||||||||||||||
Maximum loss exposure | 1,464,000,000 | [2] | 1,527,000,000 | [2] | |||||||||||||
On Balance Sheet Assets [Abstract] | |||||||||||||||||
Residual interests held | 28,000,000 | 13,000,000 | |||||||||||||||
All other Assets | 63,000,000 | [3] | 71,000,000 | [3] | |||||||||||||
Total assets | 1,036,000,000 | 1,087,000,000 | |||||||||||||||
Principal balance outstanding | 24,273,000,000 | [4] | 25,104,000,000 | [4] | |||||||||||||
Unconsolidated VIEs [Member] | Subprime Loan [Member] | First Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | |||||||||||||||||
Maximum loss exposure | 585,000,000 | [2] | 591,000,000 | [2] | |||||||||||||
On Balance Sheet Assets [Abstract] | |||||||||||||||||
Residual interests held | 0 | 0 | |||||||||||||||
All other Assets | 1,000,000 | [3] | 1,000,000 | [3] | |||||||||||||
Total assets | 234,000,000 | 236,000,000 | |||||||||||||||
Principal balance outstanding | 36,916,000,000 | [4] | 36,854,000,000 | [4] | |||||||||||||
Unconsolidated VIEs [Member] | Alt-A Loan [Member] | First Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | |||||||||||||||||
Maximum loss exposure | 435,000,000 | [2] | 437,000,000 | [2] | |||||||||||||
On Balance Sheet Assets [Abstract] | |||||||||||||||||
Residual interests held | 0 | 0 | |||||||||||||||
All other Assets | 294,000,000 | [3] | 325,000,000 | [3] | |||||||||||||
Total assets | 435,000,000 | 437,000,000 | |||||||||||||||
Principal balance outstanding | 55,293,000,000 | [4] | 56,454,000,000 | [4] | |||||||||||||
Unconsolidated VIEs [Member] | Commercial Mortgage Backed Securities [Member] | First Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | |||||||||||||||||
Maximum loss exposure | 220,000,000 | [2] | 432,000,000 | [2] | |||||||||||||
On Balance Sheet Assets [Abstract] | |||||||||||||||||
Residual interests held | 31,000,000 | 16,000,000 | |||||||||||||||
All other Assets | 0 | [3] | 0 | [3] | |||||||||||||
Total assets | 191,000,000 | 402,000,000 | |||||||||||||||
Principal balance outstanding | 18,341,000,000 | [4] | 19,730,000,000 | [4] | |||||||||||||
Consolidated VIEs [Member]
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On Balance Sheet Assets [Abstract] | |||||||||||||||||
Loans and leases | 104,556,000,000 | 109,118,000,000 | |||||||||||||||
Allowance for loan and lease losses | (2,614,000,000) | (2,674,000,000) | |||||||||||||||
All other Assets | 3,970,000,000 | 4,577,000,000 | |||||||||||||||
Total assets | 115,281,000,000 | 121,002,000,000 | |||||||||||||||
On Balance Sheet Liabilities [Abstract] | |||||||||||||||||
Long-term debt | 18,338,000,000 | 19,448,000,000 | |||||||||||||||
All other Liabilities | 179,000,000 | 253,000,000 | |||||||||||||||
Total liabilities | 19,693,000,000 | 20,851,000,000 | |||||||||||||||
Consolidated VIEs [Member] | Agency MBS [Member] | First Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | |||||||||||||||||
Maximum loss exposure | 40,801,000,000 | [2] | 42,420,000,000 | [2] | |||||||||||||
On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 757,000,000 | 1,640,000,000 | |||||||||||||||
Loans and leases | 39,590,000,000 | 40,316,000,000 | |||||||||||||||
Allowance for loan and lease losses | (2,000,000) | (3,000,000) | |||||||||||||||
All other Assets | 465,000,000 | 474,000,000 | |||||||||||||||
Total assets | 40,810,000,000 | 42,427,000,000 | |||||||||||||||
On Balance Sheet Liabilities [Abstract] | |||||||||||||||||
Long-term debt | 9,000,000 | 7,000,000 | |||||||||||||||
All other Liabilities | 0 | 0 | |||||||||||||||
Total liabilities | 9,000,000 | 7,000,000 | |||||||||||||||
Consolidated VIEs [Member] | Prime Loan [Member] | First Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | |||||||||||||||||
Maximum loss exposure | 78,000,000 | [2] | 79,000,000 | [2] | |||||||||||||
On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 0 | 0 | |||||||||||||||
Loans and leases | 137,000,000 | 140,000,000 | |||||||||||||||
Allowance for loan and lease losses | 0 | 0 | |||||||||||||||
All other Assets | 0 | 0 | |||||||||||||||
Total assets | 137,000,000 | 140,000,000 | |||||||||||||||
On Balance Sheet Liabilities [Abstract] | |||||||||||||||||
Long-term debt | 59,000,000 | 61,000,000 | |||||||||||||||
All other Liabilities | 0 | 0 | |||||||||||||||
Total liabilities | 59,000,000 | 61,000,000 | |||||||||||||||
Consolidated VIEs [Member] | Subprime Loan [Member] | First Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | |||||||||||||||||
Maximum loss exposure | 183,000,000 | [2] | 183,000,000 | [2] | |||||||||||||
On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 0 | 0 | |||||||||||||||
Loans and leases | 801,000,000 | 803,000,000 | |||||||||||||||
Allowance for loan and lease losses | 0 | 0 | |||||||||||||||
All other Assets | 10,000,000 | 7,000,000 | |||||||||||||||
Total assets | 811,000,000 | 810,000,000 | |||||||||||||||
On Balance Sheet Liabilities [Abstract] | |||||||||||||||||
Long-term debt | 804,000,000 | 803,000,000 | |||||||||||||||
All other Liabilities | 7,000,000 | 7,000,000 | |||||||||||||||
Total liabilities | 811,000,000 | 810,000,000 | |||||||||||||||
Consolidated VIEs [Member] | Alt-A Loan [Member] | First Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | |||||||||||||||||
Maximum loss exposure | 0 | [2] | 0 | [2] | |||||||||||||
On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 0 | 0 | |||||||||||||||
Loans and leases | 0 | 0 | |||||||||||||||
Allowance for loan and lease losses | 0 | 0 | |||||||||||||||
All other Assets | 0 | 0 | |||||||||||||||
Total assets | 0 | 0 | |||||||||||||||
On Balance Sheet Liabilities [Abstract] | |||||||||||||||||
Long-term debt | 0 | 0 | |||||||||||||||
All other Liabilities | 0 | 0 | |||||||||||||||
Total liabilities | 0 | 0 | |||||||||||||||
Consolidated VIEs [Member] | Commercial Mortgage Backed Securities [Member] | First Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | |||||||||||||||||
Maximum loss exposure | 0 | [2] | 0 | [2] | |||||||||||||
On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 0 | 0 | |||||||||||||||
Loans and leases | 0 | 0 | |||||||||||||||
Allowance for loan and lease losses | 0 | 0 | |||||||||||||||
All other Assets | 0 | 0 | |||||||||||||||
Total assets | 0 | 0 | |||||||||||||||
On Balance Sheet Liabilities [Abstract] | |||||||||||||||||
Long-term debt | 0 | 0 | |||||||||||||||
All other Liabilities | 0 | 0 | |||||||||||||||
Total liabilities | 0 | 0 | |||||||||||||||
Senior Securities [Member] | Unconsolidated VIEs [Member] | Agency MBS [Member] | First Lien Mortgages [Member]
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On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 661,000,000 | [5] | 650,000,000 | [5] | |||||||||||||
Debt securities carried at fair value | 15,639,000,000 | [5] | 19,451,000,000 | [5] | |||||||||||||
Senior Securities [Member] | Unconsolidated VIEs [Member] | Prime Loan [Member] | First Lien Mortgages [Member]
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On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 0 | [5] | 0 | [5] | |||||||||||||
Debt securities carried at fair value | 931,000,000 | [5] | 988,000,000 | [5] | |||||||||||||
Senior Securities [Member] | Unconsolidated VIEs [Member] | Subprime Loan [Member] | First Lien Mortgages [Member]
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On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 7,000,000 | [5] | 1,000,000 | [5] | |||||||||||||
Debt securities carried at fair value | 220,000,000 | [5] | 220,000,000 | [5] | |||||||||||||
Senior Securities [Member] | Unconsolidated VIEs [Member] | Alt-A Loan [Member] | First Lien Mortgages [Member]
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On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 28,000,000 | [5] | 3,000,000 | [5] | |||||||||||||
Debt securities carried at fair value | 112,000,000 | [5] | 109,000,000 | [5] | |||||||||||||
Senior Securities [Member] | Unconsolidated VIEs [Member] | Commercial Mortgage Backed Securities [Member] | First Lien Mortgages [Member]
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On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 5,000,000 | [5] | 14,000,000 | [5] | |||||||||||||
Debt securities carried at fair value | 91,000,000 | [5] | 306,000,000 | [5] | |||||||||||||
Subordinate Securities [Member] | Unconsolidated VIEs [Member] | Agency MBS [Member] | First Lien Mortgages [Member]
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On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 0 | [5] | 0 | [5] | |||||||||||||
Debt securities carried at fair value | 0 | [5] | 0 | [5] | |||||||||||||
Subordinate Securities [Member] | Unconsolidated VIEs [Member] | Prime Loan [Member] | First Lien Mortgages [Member]
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On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 0 | [5] | 0 | [5] | |||||||||||||
Debt securities carried at fair value | 14,000,000 | [5] | 15,000,000 | [5] | |||||||||||||
Subordinate Securities [Member] | Unconsolidated VIEs [Member] | Subprime Loan [Member] | First Lien Mortgages [Member]
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On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 0 | [5] | 8,000,000 | [5] | |||||||||||||
Debt securities carried at fair value | 6,000,000 | [5] | 6,000,000 | [5] | |||||||||||||
Subordinate Securities [Member] | Unconsolidated VIEs [Member] | Alt-A Loan [Member] | First Lien Mortgages [Member]
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On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 1,000,000 | [5] | 0 | [5] | |||||||||||||
Debt securities carried at fair value | 0 | [5] | 0 | [5] | |||||||||||||
Subordinate Securities [Member] | Unconsolidated VIEs [Member] | Commercial Mortgage Backed Securities [Member] | First Lien Mortgages [Member]
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On Balance Sheet Assets [Abstract] | |||||||||||||||||
Trading account assets | 12,000,000 | [5] | 13,000,000 | [5] | |||||||||||||
Debt securities carried at fair value | $ 52,000,000 | [5] | $ 53,000,000 | [5] | |||||||||||||
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