Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Credit Extension Commitments (Details)

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Commitments and Contingencies - Credit Extension Commitments (Details) (USD $)
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Credit Extension Commitments [Abstract]            
Legally Binding Unfunded Commitments Syndicated $ 17,800,000,000   $ 21,900,000,000      
Carrying Amount Credit Extension Commitments Syndicated 521,000,000   503,000,000      
Deferred revenue related to binding unfunded lending commitments 18,000,000   19,000,000      
Other Liabilities Reserve For Unfunded Lending Commitments 503,000,000 509,000,000 484,000,000 474,000,000 486,000,000 513,000,000
Notional Amount Of Credit Extension Commitments Under Fair Value Option 10,100,000,000   13,000,000,000      
Notional Amount of Credit Extension Commitments [Abstract]            
Expire in One Year or Less 475,352,000,000   486,482,000,000      
Expire After One Year Through Three Years 138,325,000,000   131,772,000,000      
Expire After Three Years Through Five Years 154,148,000,000   157,244,000,000      
Expire After Five Years 35,360,000,000   40,535,000,000      
Notional Amount Of Credit Extension Commitments 803,185,000,000   816,033,000,000      
External Credit Rating, Investment Grade [Member]
           
Notional Amount of Credit Extension Commitments [Abstract]            
Notional amount of Sblcs and financial guarantees 26,200,000,000   27,600,000,000      
External Credit Rating, Non Investment Grade [Member]
           
Notional Amount of Credit Extension Commitments [Abstract]            
Notional amount of Sblcs and financial guarantees 9,000,000,000   9,600,000,000      
Legally Binding Commitments [Member]
           
Notional Amount of Credit Extension Commitments [Abstract]            
Expire in One Year or Less 104,951,000,000   108,636,000,000      
Expire After One Year Through Three Years 138,325,000,000   131,772,000,000      
Expire After Three Years Through Five Years 154,148,000,000   157,244,000,000      
Expire After Five Years 35,360,000,000   40,535,000,000      
Notional Amount Of Credit Extension Commitments 432,784,000,000   438,187,000,000      
Loan Commitments [Member]
           
Notional Amount of Credit Extension Commitments [Abstract]            
Expire in One Year or Less 75,710,000,000   80,799,000,000      
Expire After One Year Through Three Years 111,200,000,000   105,175,000,000      
Expire After Three Years Through Five Years 132,908,000,000   133,290,000,000      
Expire After Five Years 19,534,000,000   21,864,000,000      
Notional Amount Of Credit Extension Commitments 339,352,000,000   341,128,000,000      
Home Equity [Member]
           
Notional Amount of Credit Extension Commitments [Abstract]            
Expire in One Year or Less 5,674,000,000   4,580,000,000      
Expire After One Year Through Three Years 18,437,000,000   16,855,000,000      
Expire After Three Years Through Five Years 17,012,000,000   21,074,000,000      
Expire After Five Years 13,856,000,000   14,301,000,000      
Notional Amount Of Credit Extension Commitments 54,979,000,000   56,810,000,000      
Financial Standby Letter Of Credit And Financial Guarantee [Member]
           
Notional Amount of Credit Extension Commitments [Abstract]            
Expire in One Year or Less 21,030,000,000 [1]   21,994,000,000 [1]      
Expire After One Year Through Three Years 8,439,000,000 [1]   8,843,000,000 [1]      
Expire After Three Years Through Five Years 4,165,000,000 [1]   2,876,000,000 [1]      
Expire After Five Years 1,939,000,000 [1]   3,967,000,000 [1]      
Notional Amount Of Credit Extension Commitments 35,573,000,000 [1]   37,680,000,000 [1]      
Financial Standby Letter Of Credit And Financial Guarantee [Member] | Consumer Letter of Credit [Member]
           
Notional Amount of Credit Extension Commitments [Abstract]            
Notional Amount Of Credit Extension Commitments 411,000,000   453,000,000      
Letter of Credit [Member]
           
Notional Amount of Credit Extension Commitments [Abstract]            
Expire in One Year or Less 2,537,000,000   1,263,000,000      
Expire After One Year Through Three Years 249,000,000   899,000,000      
Expire After Three Years Through Five Years 63,000,000   4,000,000      
Expire After Five Years 31,000,000   403,000,000      
Notional Amount Of Credit Extension Commitments 2,880,000,000   2,569,000,000      
Credit Card Lines [Member]
           
Notional Amount of Credit Extension Commitments [Abstract]            
Expire in One Year or Less 370,401,000,000 [2]   377,846,000,000 [2]      
Expire After One Year Through Three Years 0 [2]   0 [2]      
Expire After Three Years Through Five Years 0 [2]   0 [2]      
Expire After Five Years 0 [2]   0 [2]      
Notional Amount Of Credit Extension Commitments 370,401,000,000 [2]   377,846,000,000 [2]      
Unfunded loan commitments [Member]
           
Credit Extension Commitments [Abstract]            
Fair Value Carrying Amount Liabilities $ 330,000,000   $ 354,000,000      
[1] The notional amounts of SBLCs and financial guarantees classified as investment grade and non-investment grade based on the credit quality of the underlying reference name within the instrument were $26.2 billion and $9.0 billion at June 30, 2014, and $27.6 billion and $9.6 billion at December 31, 2013. Amounts include consumer SBLCs of $411 million and $453 million at June 30, 2014 and December 31, 2013.
[2] Includes business card unused lines of credit.