Securitizations and Other Variable Interest Entities - First Lien Mortgages VIE (Details) (USD $)
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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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Dec. 31, 2009
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Dec. 31, 2012
Home Equity Line of Credit [Member]
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Dec. 31, 2011
Home Equity Line of Credit [Member]
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Dec. 31, 2012
Unconsolidated VIEs [Member]
Home Equity Line of Credit [Member]
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Dec. 31, 2011
Unconsolidated VIEs [Member]
Home Equity Line of Credit [Member]
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Dec. 31, 2012
Unconsolidated VIEs [Member]
Agency Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Unconsolidated VIEs [Member]
Agency Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Unconsolidated VIEs [Member]
Prime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Unconsolidated VIEs [Member]
Prime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Unconsolidated VIEs [Member]
Subprime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Unconsolidated VIEs [Member]
Subprime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Unconsolidated VIEs [Member]
Alt-A Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Unconsolidated VIEs [Member]
Alt-A Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Unconsolidated VIEs [Member]
Commercial Mortgage Backed Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Unconsolidated VIEs [Member]
Commercial Mortgage Backed Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Consolidated VIEs [Member]
trust
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Dec. 31, 2011
Consolidated VIEs [Member]
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Apr. 14, 2011
Consolidated VIEs [Member]
trust
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Dec. 31, 2012
Consolidated VIEs [Member]
Home Equity Line of Credit [Member]
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Dec. 31, 2011
Consolidated VIEs [Member]
Home Equity Line of Credit [Member]
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Dec. 31, 2012
Consolidated VIEs [Member]
Agency Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Consolidated VIEs [Member]
Agency Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Consolidated VIEs [Member]
Prime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Consolidated VIEs [Member]
Prime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Consolidated VIEs [Member]
Subprime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Consolidated VIEs [Member]
Subprime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Consolidated VIEs [Member]
Alt-A Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Consolidated VIEs [Member]
Alt-A Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Consolidated VIEs [Member]
Commercial Mortgage Backed Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Consolidated VIEs [Member]
Commercial Mortgage Backed Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Senior Securities [Member]
Unconsolidated VIEs [Member]
Agency Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Senior Securities [Member]
Unconsolidated VIEs [Member]
Agency Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Senior Securities [Member]
Unconsolidated VIEs [Member]
Prime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Senior Securities [Member]
Unconsolidated VIEs [Member]
Prime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Senior Securities [Member]
Unconsolidated VIEs [Member]
Subprime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Senior Securities [Member]
Unconsolidated VIEs [Member]
Subprime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Senior Securities [Member]
Unconsolidated VIEs [Member]
Alt-A Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Senior Securities [Member]
Unconsolidated VIEs [Member]
Alt-A Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Senior Securities [Member]
Unconsolidated VIEs [Member]
Commercial Mortgage Backed Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Senior Securities [Member]
Unconsolidated VIEs [Member]
Commercial Mortgage Backed Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Subordinate Securities [Member]
Unconsolidated VIEs [Member]
Agency Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Subordinate Securities [Member]
Unconsolidated VIEs [Member]
Agency Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Subordinate Securities [Member]
Unconsolidated VIEs [Member]
Prime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Subordinate Securities [Member]
Unconsolidated VIEs [Member]
Prime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Subordinate Securities [Member]
Unconsolidated VIEs [Member]
Subprime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Subordinate Securities [Member]
Unconsolidated VIEs [Member]
Subprime Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Subordinate Securities [Member]
Unconsolidated VIEs [Member]
Alt-A Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Subordinate Securities [Member]
Unconsolidated VIEs [Member]
Alt-A Loan [Member]
First Lien Mortgages [Member]
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Dec. 31, 2012
Subordinate Securities [Member]
Unconsolidated VIEs [Member]
Commercial Mortgage Backed Securities [Member]
First Lien Mortgages [Member]
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Dec. 31, 2011
Subordinate Securities [Member]
Unconsolidated VIEs [Member]
Commercial Mortgage Backed Securities [Member]
First Lien Mortgages [Member]
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Apr. 14, 2011
Assured Guaranty [Member]
First Mortgage [Member]
trust
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Variable Interest Entity [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Unpaid principal balance of mortgage loans eligible for repurchase | $ 12,100,000,000 | $ 11,000,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Principal amount that would be payable to the securitization vehicles | (12,100,000,000) | (11,000,000,000) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Maximum loss exposure | 8,711,000,000 | [1] | 10,235,000,000 | [1] | 6,707,000,000 | [1] | 7,563,000,000 | [1] | 28,591,000,000 | [2] | 37,519,000,000 | [2] | 2,038,000,000 | [2] | 2,375,000,000 | [2] | 410,000,000 | [2] | 289,000,000 | [2] | 367,000,000 | [2] | 506,000,000 | [2] | 702,000,000 | [2] | 981,000,000 | [2] | 2,004,000,000 | [1] | 2,672,000,000 | [1] | 46,959,000,000 | [2] | 50,648,000,000 | [2] | 104,000,000 | [2] | 450,000,000 | [2] | 390,000,000 | [2] | 419,000,000 | [2] | 0 | [2] | 0 | [2] | 0 | [2] | 0 | [2] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
On Balance Sheet Assets [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Trading account assets | 8,000,000 | 5,000,000 | 8,000,000 | 5,000,000 | 0 | 0 | 619,000,000 | [3] | 8,744,000,000 | [3] | 16,000,000 | [3] | 94,000,000 | [3] | 14,000,000 | [3] | 3,000,000 | [3] | 0 | [3] | 343,000,000 | [3] | 12,000,000 | [3] | 21,000,000 | [3] | 0 | [3] | 0 | [3] | 0 | [3] | 0 | [3] | 3,000,000 | [3] | 30,000,000 | [3] | 0 | [3] | 0 | [3] | 13,000,000 | [3] | 3,000,000 | [3] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
AFS Debt Securities | 286,906,000,000 | 276,151,000,000 | 14,000,000 | 13,000,000 | 14,000,000 | 13,000,000 | 0 | 0 | 25,492,000,000 | [3] | 28,775,000,000 | [3] | 1,388,000,000 | [3] | 2,001,000,000 | [3] | 210,000,000 | [3] | 174,000,000 | [3] | 128,000,000 | [3] | 163,000,000 | [3] | 581,000,000 | [3] | 846,000,000 | [3] | 0 | [3] | 0 | [3] | 21,000,000 | [3] | 26,000,000 | [3] | 9,000,000 | [3] | 30,000,000 | [3] | 0 | [3] | 0 | [3] | 0 | [3] | 0 | [3] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Residual interests held | 0 | 0 | 18,000,000 | 8,000,000 | 9,000,000 | 9,000,000 | 0 | 0 | 40,000,000 | 43,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Other Assets | 164,605,000,000 | 145,686,000,000 | 2,480,000,000 | [4] | 0 | [4] | 64,000,000 | [4] | 0 | [4] | 1,000,000 | [4] | 0 | [4] | 239,000,000 | [4] | 0 | [4] | 0 | [4] | 0 | [4] | 4,654,000,000 | 4,769,000,000 | 972,000,000 | 495,000,000 | 10,000,000 | 63,000,000 | 91,000,000 | 59,000,000 | 0 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Total assets | 2,209,974,000,000 | [5] | 2,129,046,000,000 | [5] | 2,026,000,000 | 2,690,000,000 | 22,000,000 | 18,000,000 | 28,591,000,000 | 37,519,000,000 | 1,507,000,000 | 2,129,000,000 | 246,000,000 | 246,000,000 | 367,000,000 | 506,000,000 | 646,000,000 | 913,000,000 | 134,431,000,000 | 151,761,000,000 | 2,004,000,000 | 2,672,000,000 | 46,959,000,000 | 50,648,000,000 | 293,000,000 | 1,361,000,000 | 1,727,000,000 | 1,573,000,000 | 0 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Principal balance outstanding | 14,841,000,000 | 17,397,000,000 | 12,644,000,000 | 14,422,000,000 | 797,315,000,000 | [6] | 1,198,766,000,000 | [6] | 45,819,000,000 | [6] | 61,207,000,000 | [6] | 53,822,000,000 | [6] | 73,949,000,000 | [6] | 71,990,000,000 | [6] | 101,622,000,000 | [6] | 56,733,000,000 | [6] | 76,645,000,000 | [6] | 2,197,000,000 | 2,975,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Loans and leases | 907,819,000,000 | 926,200,000,000 | 2,197,000,000 | 2,975,000,000 | 0 | 0 | 123,227,000,000 | 140,194,000,000 | 2,197,000,000 | 2,975,000,000 | 45,991,000,000 | 50,159,000,000 | 283,000,000 | 1,298,000,000 | 722,000,000 | 892,000,000 | 0 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Allowance for Loan and Lease Losses | (24,179,000,000) | (33,783,000,000) | (41,885,000,000) | (47,988,000,000) | (193,000,000) | (303,000,000) | 0 | 0 | (3,658,000,000) | (5,066,000,000) | (193,000,000) | (303,000,000) | (4,000,000) | (6,000,000) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Loans held-for-sale | 19,413,000,000 | 13,762,000,000 | 1,969,000,000 | 1,635,000,000 | 0 | 0 | 0 | 0 | 914,000,000 | 622,000,000 | 0 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
On Balance Sheet Liabilities [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Commercial paper and other short-term borrowings | 30,731,000,000 | 35,698,000,000 | 3,731,000,000 | 5,777,000,000 | 0 | 0 | 0 | 0 | 741,000,000 | 650,000,000 | 0 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Long-term debt (includes $49,161 and $46,239 measured at fair value) | 275,585,000,000 | 372,265,000,000 | 2,331,000,000 | 3,081,000,000 | 0 | 0 | 34,256,000,000 | 49,054,000,000 | 2,331,000,000 | 3,081,000,000 | 0 | 0 | 212,000,000 | 1,360,000,000 | 941,000,000 | 911,000,000 | 0 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Other Liabilities | 92,000,000 | 66,000,000 | 0 | 0 | 360,000,000 | 1,116,000,000 | 92,000,000 | 66,000,000 | 0 | 0 | 0 | 0 | 0 | 57,000,000 | 0 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Liabilities | 1,973,018,000,000 | 1,898,945,000,000 | 2,423,000,000 | 3,147,000,000 | 0 | 0 | 38,347,000,000 | 55,947,000,000 | 2,423,000,000 | 3,147,000,000 | 0 | 0 | 212,000,000 | 1,360,000,000 | 1,682,000,000 | 1,618,000,000 | 0 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
In Text Details [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Number Of Trusts Involved In Settlement Agreement | 21 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Number of Securities, Entity has a Loss Sharing Reinsurance Obligation | 4 | 1,200,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Total Assets of Securities, Entity has a Loss Sharing Reinsurance Obligation | $ 900,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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