Securitizations and Other Variable Interest Entities - First Lien Mortgages VIE (Details) (USD $)
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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On Balance Sheet Assets [Abstract] | ||||||||||||||||
Debt securities carried at fair value | $ 268,795,000,000 | $ 310,850,000,000 | ||||||||||||||
Loans and leases | 928,233,000,000 | 907,819,000,000 | ||||||||||||||
Allowance for loan and lease losses | (17,428,000,000) | (24,179,000,000) | (33,783,000,000) | (41,885,000,000) | ||||||||||||
Loans held-for-sale | 11,362,000,000 | 19,413,000,000 | ||||||||||||||
All other assets | 124,090,000,000 | 150,112,000,000 | ||||||||||||||
Total assets | 2,102,273,000,000 | [1] | 2,209,974,000,000 | [1] | ||||||||||||
On Balance Sheet Liabilities [Abstract] | ||||||||||||||||
Short-term borrowings | 45,999,000,000 | 30,731,000,000 | ||||||||||||||
Long-term debt | 249,674,000,000 | 275,585,000,000 | ||||||||||||||
Total liabilities | 1,869,588,000,000 | 1,973,018,000,000 | ||||||||||||||
In Text Details [Abstract] | ||||||||||||||||
Unpaid principal balance of mortgage loans eligible for repurchase | 1,600,000,000 | 12,100,000,000 | ||||||||||||||
Principal amount that would be payable to the securitization vehicles | 1,600,000,000 | 12,100,000,000 | ||||||||||||||
Unconsolidated VIEs [Member] | Agency MBS [Member] | First-Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | ||||||||||||||||
Maximum loss exposure | 21,140,000,000 | [2] | 28,591,000,000 | [2] | ||||||||||||
On Balance Sheet Assets [Abstract] | ||||||||||||||||
Residual interests held | 0 | 0 | ||||||||||||||
All other assets | 1,039,000,000 | [3] | 1,551,000,000 | [3] | ||||||||||||
Total assets | 21,140,000,000 | 28,591,000,000 | ||||||||||||||
Principal balance outstanding | 437,765,000,000 | [4] | 780,202,000,000 | [4] | ||||||||||||
Unconsolidated VIEs [Member] | Prime Loan [Member] | First-Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | ||||||||||||||||
Maximum loss exposure | 1,527,000,000 | [2] | 2,038,000,000 | [2] | ||||||||||||
On Balance Sheet Assets [Abstract] | ||||||||||||||||
Residual interests held | 13,000,000 | 18,000,000 | ||||||||||||||
All other assets | 71,000,000 | [3] | 64,000,000 | [3] | ||||||||||||
Total assets | 1,087,000,000 | 1,507,000,000 | ||||||||||||||
Principal balance outstanding | 25,104,000,000 | [4] | 47,348,000,000 | [4] | ||||||||||||
Unconsolidated VIEs [Member] | Subprime Loan [Member] | First-Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | ||||||||||||||||
Maximum loss exposure | 406,000,000 | [2] | 410,000,000 | [2] | ||||||||||||
On Balance Sheet Assets [Abstract] | ||||||||||||||||
Residual interests held | 0 | 9,000,000 | ||||||||||||||
All other assets | 1,000,000 | [3] | 1,000,000 | [3] | ||||||||||||
Total assets | 236,000,000 | 246,000,000 | ||||||||||||||
Principal balance outstanding | 36,854,000,000 | [4] | 63,813,000,000 | [4] | ||||||||||||
Unconsolidated VIEs [Member] | Alt-A Loan [Member] | First-Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | ||||||||||||||||
Maximum loss exposure | 437,000,000 | [2] | 367,000,000 | [2] | ||||||||||||
On Balance Sheet Assets [Abstract] | ||||||||||||||||
Residual interests held | 0 | 0 | ||||||||||||||
All other assets | 325,000,000 | [3] | 239,000,000 | [3] | ||||||||||||
Total assets | 437,000,000 | 367,000,000 | ||||||||||||||
Principal balance outstanding | 56,454,000,000 | [4] | 80,860,000,000 | [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 | 432,000,000 | [2] | 702,000,000 | [2] | ||||||||||||
On Balance Sheet Assets [Abstract] | ||||||||||||||||
Residual interests held | 16,000,000 | 40,000,000 | ||||||||||||||
All other assets | 0 | [3] | 0 | [3] | ||||||||||||
Total assets | 402,000,000 | 646,000,000 | ||||||||||||||
Principal balance outstanding | 19,730,000,000 | [4] | 56,733,000,000 | [4] | ||||||||||||
Consolidated VIEs [Member]
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On Balance Sheet Assets [Abstract] | ||||||||||||||||
Loans and leases | 109,118,000,000 | 123,227,000,000 | ||||||||||||||
Allowance for loan and lease losses | (2,674,000,000) | (3,658,000,000) | ||||||||||||||
Loans held-for-sale | 1,384,000,000 | 1,969,000,000 | ||||||||||||||
All other assets | 4,577,000,000 | 4,654,000,000 | ||||||||||||||
Total assets | 121,002,000,000 | 134,431,000,000 | ||||||||||||||
On Balance Sheet Liabilities [Abstract] | ||||||||||||||||
Short-term borrowings | 1,150,000,000 | 3,731,000,000 | ||||||||||||||
Long-term debt | 19,448,000,000 | 34,256,000,000 | ||||||||||||||
All other liabilities | 253,000,000 | 360,000,000 | ||||||||||||||
Total liabilities | 20,851,000,000 | 38,347,000,000 | ||||||||||||||
In Text Details [Abstract] | ||||||||||||||||
Number of Securities, Entity has a Loss Sharing Reinsurance Obligation | 871,000,000 | 1,200,000,000 | ||||||||||||||
Consolidated VIEs [Member] | Agency MBS [Member] | First-Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | ||||||||||||||||
Maximum loss exposure | 42,420,000,000 | [2] | 46,959,000,000 | [2] | ||||||||||||
On Balance Sheet Assets [Abstract] | ||||||||||||||||
Trading account assets | 1,640,000,000 | 0 | ||||||||||||||
Loans and leases | 40,316,000,000 | 45,991,000,000 | ||||||||||||||
Allowance for loan and lease losses | (3,000,000) | (4,000,000) | ||||||||||||||
Loans held-for-sale | 0 | 0 | ||||||||||||||
All other assets | 474,000,000 | 972,000,000 | ||||||||||||||
Total assets | 42,427,000,000 | 46,959,000,000 | ||||||||||||||
On Balance Sheet Liabilities [Abstract] | ||||||||||||||||
Short-term borrowings | 0 | 0 | ||||||||||||||
Long-term debt | 7,000,000 | 0 | ||||||||||||||
All other liabilities | 0 | 0 | ||||||||||||||
Total liabilities | 7,000,000 | 0 | ||||||||||||||
Consolidated VIEs [Member] | Prime Loan [Member] | First-Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | ||||||||||||||||
Maximum loss exposure | 79,000,000 | [2] | 104,000,000 | [2] | ||||||||||||
On Balance Sheet Assets [Abstract] | ||||||||||||||||
Trading account assets | 0 | 0 | ||||||||||||||
Loans and leases | 140,000,000 | 283,000,000 | ||||||||||||||
Allowance for loan and lease losses | 0 | 0 | ||||||||||||||
Loans held-for-sale | 0 | 0 | ||||||||||||||
All other assets | 0 | 10,000,000 | ||||||||||||||
Total assets | 140,000,000 | 293,000,000 | ||||||||||||||
On Balance Sheet Liabilities [Abstract] | ||||||||||||||||
Short-term borrowings | 0 | 0 | ||||||||||||||
Long-term debt | 61,000,000 | 212,000,000 | ||||||||||||||
All other liabilities | 0 | 0 | ||||||||||||||
Total liabilities | 61,000,000 | 212,000,000 | ||||||||||||||
Consolidated VIEs [Member] | Subprime Loan [Member] | First-Lien Mortgages [Member]
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Variable Interest Entity [Line Items] | ||||||||||||||||
Maximum loss exposure | 368,000,000 | [2] | 390,000,000 | [2] | ||||||||||||
On Balance Sheet Assets [Abstract] | ||||||||||||||||
Trading account assets | 0 | 0 | ||||||||||||||
Loans and leases | 803,000,000 | 722,000,000 | ||||||||||||||
Allowance for loan and lease losses | 0 | 0 | ||||||||||||||
Loans held-for-sale | 0 | 914,000,000 | ||||||||||||||
All other assets | 7,000,000 | 91,000,000 | ||||||||||||||
Total assets | 810,000,000 | 1,727,000,000 | ||||||||||||||
On Balance Sheet Liabilities [Abstract] | ||||||||||||||||
Short-term borrowings | 0 | 741,000,000 | ||||||||||||||
Long-term debt | 803,000,000 | 941,000,000 | ||||||||||||||
All other liabilities | 7,000,000 | 0 | ||||||||||||||
Total liabilities | 810,000,000 | 1,682,000,000 | ||||||||||||||
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 | ||||||||||||||
Loans held-for-sale | 0 | 0 | ||||||||||||||
All other assets | 0 | 0 | ||||||||||||||
Total assets | 0 | 0 | ||||||||||||||
On Balance Sheet Liabilities [Abstract] | ||||||||||||||||
Short-term borrowings | 0 | 0 | ||||||||||||||
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 | ||||||||||||||
Loans held-for-sale | 0 | 0 | ||||||||||||||
All other assets | 0 | 0 | ||||||||||||||
Total assets | 0 | 0 | ||||||||||||||
On Balance Sheet Liabilities [Abstract] | ||||||||||||||||
Short-term borrowings | 0 | 0 | ||||||||||||||
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 | 650,000,000 | [5] | 619,000,000 | [5] | ||||||||||||
Debt securities carried at fair value | 19,451,000,000 | [5] | 26,421,000,000 | [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] | 16,000,000 | [5] | ||||||||||||
Debt securities carried at fair value | 988,000,000 | [5] | 1,388,000,000 | [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 | 1,000,000 | [5] | 14,000,000 | [5] | ||||||||||||
Debt securities carried at fair value | 220,000,000 | [5] | 210,000,000 | [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 | 3,000,000 | [5] | 0 | [5] | ||||||||||||
Debt securities carried at fair value | 109,000,000 | [5] | 128,000,000 | [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 | 14,000,000 | [5] | 12,000,000 | [5] | ||||||||||||
Debt securities carried at fair value | 306,000,000 | [5] | 581,000,000 | [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 | 15,000,000 | [5] | 21,000,000 | [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 | 8,000,000 | [5] | 3,000,000 | [5] | ||||||||||||
Debt securities carried at fair value | 6,000,000 | [5] | 9,000,000 | [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 | 0 | [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 | 13,000,000 | [5] | 13,000,000 | [5] | ||||||||||||
Debt securities carried at fair value | $ 53,000,000 | [5] | $ 0 | [5] | ||||||||||||
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