Quarterly report pursuant to Section 13 or 15(d)

Securitizations and Other Variable Interest Entities - Other Asset Backed (Details)

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Securitizations and Other Variable Interest Entities - Other Asset Backed (Details) (USD $)
 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended
Sep. 30, 2012
Jun. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Dec. 31, 2010
Sep. 30, 2012
Resecuritization Trusts [Member]
Sep. 30, 2011
Resecuritization Trusts [Member]
Sep. 30, 2012
Resecuritization Trusts [Member]
Sep. 30, 2011
Resecuritization Trusts [Member]
Sep. 30, 2012
Municipal Bonds [Member]
Sep. 30, 2011
Municipal Bonds [Member]
Sep. 30, 2012
Municipal Bonds [Member]
Sep. 30, 2011
Municipal Bonds [Member]
Dec. 31, 2011
Municipal Bonds [Member]
Sep. 30, 2012
Automobile And Other Securitization Trusts [Member]
Dec. 31, 2011
Automobile And Other Securitization Trusts [Member]
Sep. 30, 2012
Automobile Loan [Member]
Dec. 31, 2011
Automobile Loan [Member]
Sep. 30, 2012
Student Loan [Member]
Dec. 31, 2011
Student Loan [Member]
Sep. 30, 2012
Other Loan and Receivable [Member]
Dec. 31, 2011
Other Loan and Receivable [Member]
Sep. 30, 2012
Unconsolidated VIEs [Member]
Resecuritization Trusts [Member]
Dec. 31, 2011
Unconsolidated VIEs [Member]
Resecuritization Trusts [Member]
Sep. 30, 2012
Unconsolidated VIEs [Member]
Resecuritization Trusts [Member]
Senior Debt Securities [Member]
Dec. 31, 2011
Unconsolidated VIEs [Member]
Resecuritization Trusts [Member]
Senior Debt Securities [Member]
Sep. 30, 2012
Unconsolidated VIEs [Member]
Resecuritization Trusts [Member]
Subordinated Debt Securities [Member]
Dec. 31, 2011
Unconsolidated VIEs [Member]
Resecuritization Trusts [Member]
Subordinated Debt Securities [Member]
Sep. 30, 2012
Unconsolidated VIEs [Member]
Municipal Bonds [Member]
Dec. 31, 2011
Unconsolidated VIEs [Member]
Municipal Bonds [Member]
Sep. 30, 2012
Unconsolidated VIEs [Member]
Municipal Bonds [Member]
Senior Debt Securities [Member]
Dec. 31, 2011
Unconsolidated VIEs [Member]
Municipal Bonds [Member]
Senior Debt Securities [Member]
Sep. 30, 2012
Unconsolidated VIEs [Member]
Municipal Bonds [Member]
Subordinated Debt Securities [Member]
Dec. 31, 2011
Unconsolidated VIEs [Member]
Municipal Bonds [Member]
Subordinated Debt Securities [Member]
Sep. 30, 2012
Unconsolidated VIEs [Member]
Automobile And Other Securitization Trusts [Member]
Dec. 31, 2011
Unconsolidated VIEs [Member]
Automobile And Other Securitization Trusts [Member]
Sep. 30, 2012
Unconsolidated VIEs [Member]
Automobile And Other Securitization Trusts [Member]
Senior Debt Securities [Member]
Dec. 31, 2011
Unconsolidated VIEs [Member]
Automobile And Other Securitization Trusts [Member]
Senior Debt Securities [Member]
Sep. 30, 2012
Unconsolidated VIEs [Member]
Automobile And Other Securitization Trusts [Member]
Subordinated Debt Securities [Member]
Dec. 31, 2011
Unconsolidated VIEs [Member]
Automobile And Other Securitization Trusts [Member]
Subordinated Debt Securities [Member]
Sep. 30, 2012
Consolidated VIEs [Member]
Dec. 31, 2011
Consolidated VIEs [Member]
Sep. 30, 2012
Consolidated VIEs [Member]
Resecuritization Trusts [Member]
Dec. 31, 2011
Consolidated VIEs [Member]
Resecuritization Trusts [Member]
Sep. 30, 2012
Consolidated VIEs [Member]
Municipal Bonds [Member]
Dec. 31, 2011
Consolidated VIEs [Member]
Municipal Bonds [Member]
Sep. 30, 2012
Consolidated VIEs [Member]
Automobile And Other Securitization Trusts [Member]
Dec. 31, 2011
Consolidated VIEs [Member]
Automobile And Other Securitization Trusts [Member]
Sep. 30, 2012
Automobile Loan [Member]
Variable Interest Entity [Line Items]                                                                                                    
Maximum loss exposure                                               $ 21,596,000,000 $ 31,140,000,000         $ 3,388,000,000 $ 3,752,000,000         $ 90,000,000 $ 93,000,000             $ 557,000,000 $ 0 $ 2,867,000,000 $ 3,901,000,000 $ 1,268,000,000 $ 1,087,000,000  
On Balance Sheet Assets [Abstract]                                                                                                    
Trading account assets                                                   1,715,000,000 [1],[2] 2,595,000,000 [1],[2]         72,000,000 [1],[2] 228,000,000 [1],[2]         0 [1],[2] 0 [1],[2]         1,385,000,000 0 2,867,000,000 3,901,000,000 0 0  
Loans and leases 893,035,000,000   926,200,000,000                                                                             125,043,000,000 140,194,000,000 0 0 0 0 3,007,000,000 4,923,000,000  
Allowance for loan and lease losses (26,233,000,000) (30,288,000,000) (33,783,000,000) (35,082,000,000) (37,312,000,000) (41,885,000,000)                                                                       (3,811,000,000) (5,066,000,000) 0 0 0 0 (3,000,000) (7,000,000)  
AFS Debt Securities 305,949,000,000   276,151,000,000                                             19,707,000,000 [1],[2] 27,616,000,000 [1],[2] 77,000,000 [1],[2] 544,000,000 [1],[2]     0 [1],[2] 0 [1],[2] 0 [1],[2] 0 [1],[2]     78,000,000 [1],[2] 81,000,000 [1],[2] 0 [1],[2] 0 [1],[2]                  
Residual interests held                                               97,000,000 [3] 385,000,000 [3]         0 [3] 0 [3]         0 [3] 0 [3]                          
Other Assets 150,698,000,000   145,686,000,000                                         0 0         0 0         12,000,000 12,000,000         3,754,000,000 4,769,000,000 0 0 0 0 313,000,000 168,000,000  
Total assets 2,166,162,000,000   2,129,046,000,000 2,219,628,000,000                                       21,596,000,000 31,140,000,000         72,000,000 228,000,000         90,000,000 93,000,000         137,656,000,000 151,761,000,000 1,385,000,000 0 2,867,000,000 3,901,000,000 3,317,000,000 5,084,000,000  
Unconsolidated, Total assets of VIEs                                               45,810,000,000 [4] 60,459,000,000 [4]         5,299,000,000 [4] 5,964,000,000 [4]         2,117,000,000 [4] 668,000,000 [4]                          
On Balance Sheet Liabilities [Abstract]                                                                                                    
Commercial paper and other short-term borrowings 35,291,000,000   35,698,000,000                                                                             3,872,000,000 5,777,000,000 0 0 2,761,000,000 5,127,000,000 0 0  
Long-term debt 286,534,000,000   372,265,000,000                                                                             38,055,000,000 49,054,000,000 828,000,000 0 0 0 2,046,000,000 3,992,000,000  
Other Liabilities                                                                                   625,000,000 1,116,000,000 0 0 0 0 102,000,000 90,000,000  
Total liabilities 1,927,556,000,000   1,898,945,000,000                                                                             42,552,000,000 55,947,000,000 828,000,000 0 2,761,000,000 5,127,000,000 2,148,000,000 4,082,000,000  
In Text Details [Abstract]                                                                                                    
Transfers Of Financial Assets Accounted For As Sale Initial Fair Value Of Assets Obtained As Proceeds, in Period             12,200,000,000 4,200,000,000 36,500,000,000 28,300,000,000                                                                                
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale, Gain (Loss) on Sale               173,000,000 0 909,000,000                                                                               7,000,000
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers                     69,000,000 182,000,000 268,000,000 597,000,000                                                                        
Principal Amount Outstanding on Loans Securitized or Asset-backed Financing Arrangement                     2,200,000,000   2,200,000,000   2,500,000,000                                                                      
Liquidity Commitments To Unconsolidated Securitization Trusts                     3,300,000,000   3,300,000,000   3,500,000,000                                                                      
Weighted average remaining life of bonds held in the trusts in years 8.8                                                                                                  
Qualitative and Quantitative Information, Transferor's Continuing Involvement, Principal Amount Outstanding, Continued Recognition, Amount                               $ 5,400,000,000 $ 5,800,000,000 $ 4,100,000,000 $ 3,900,000,000 $ 1,000,000,000 $ 1,200,000,000 $ 303,000,000 $ 668,000,000                                                     $ 2,400,000,000
[1] As a holder of these securities, the Corporation receives scheduled principal and interest payments. During the three and nine months ended September 30, 2012 and 2011, there were no OTTI losses recorded on those securities classified as AFS debt securities.
[2] The retained senior and subordinate securities were valued using quoted market prices or observable market inputs (Level 2 of the fair value hierarchy).
[3] The retained residual interests are carried at fair value which was derived using model valuations (Level 2 of the fair value hierarchy).
[4] Total assets include loans the Corporation transferred with which the Corporation has continuing involvement, which may include servicing the loan.