Quarterly report pursuant to Section 13 or 15(d)

Securities - Amortized Cost, Gains and Losses, and Fair Value (Details)

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Securities - Amortized Cost, Gains and Losses, and Fair Value (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Dec. 31, 2012
Other Debt Securities, Carried at Fair Value:            
Amortized Cost $ 43,032   $ 43,032   $ 34,145  
Gross Unrealized Gains 151   151   34  
Gross Unrealized Losses (594)   (594)   (1,335)  
Other Debt Securities Carried at Fair Value 42,589   42,589   32,844  
Debt Securities Carried at Fair Value:            
Amortized Cost 292,749   292,749   275,290  
Gross Unrealized Gains 2,567   2,567   1,391  
Gross Unrealized Losses (2,455)   (2,455)   (7,886)  
Debt Securities Carried at Fair Value 292,861   292,861   268,795  
Held-to-maturity Securities:            
Amortized Cost 60,022 [1]   60,022 [1]   55,150  
Gross Unrealized Gains 247   247   20  
Gross Unrealized Losses (1,088)   (1,088)   (2,740)  
Held-to-maturity, at cost, fair value 59,181 [1]   59,181 [1]   52,430  
Debt securities:            
Amortized Cost 352,771   352,771   330,440  
Gross Unrealized Gains 2,814   2,814   1,411  
Gross Unrealized Losses (3,543)   (3,543)   (10,626)  
Debt Securities, Fair Value 352,042   352,042   321,225  
In Text Details [Abstract]            
Accumulated other comprehensive income (loss) (4,711) (7,709) (4,711) (7,709) (8,457) (2,797)
Related Income Tax Benefit     200      
Nonperforming Debt Securities 155   155   103  
Unrealized Mark-to-Market Net Losses in other income (loss) 416 (1,200) 860 (1,400)    
Realized Gains (Losses) on Other Debt Securities 100 (220) 83 (205)    
US Government Corporations and Agencies Securities [Member]
            
Available-for-sale Debt Securities:            
Amortized Cost 38,417   38,417   8,910  
Gross Unrealized Gains 301   301   106  
Gross Unrealized Losses (15)   (15)   (62)  
Debt securities carried at fair value 38,703   38,703   8,954  
Other Debt Securities, Carried at Fair Value:            
Other Debt Securities Carried at Fair Value 4,242   4,242   4,062  
Debt Securities Carried at Fair Value:            
Debt Securities Carried at Fair Value 42,945   42,945      
Agency MBS [Member]
            
Available-for-sale Debt Securities:            
Amortized Cost 161,636   161,636   170,112  
Gross Unrealized Gains 1,571   1,571   777  
Gross Unrealized Losses (1,664)   (1,664)   (5,954)  
Debt securities carried at fair value 161,543   161,543   164,935  
Other Debt Securities, Carried at Fair Value:            
Other Debt Securities Carried at Fair Value 16,448   16,448   16,500  
Debt Securities Carried at Fair Value:            
Debt Securities Carried at Fair Value 177,991   177,991      
Collateralized Mortgage Obligations [Member]
            
Available-for-sale Debt Securities:            
Amortized Cost 12,370   12,370   22,731  
Gross Unrealized Gains 132   132   76  
Gross Unrealized Losses (61)   (61)   (315)  
Debt securities carried at fair value 12,441   12,441   22,492  
Other Debt Securities, Carried at Fair Value:            
Other Debt Securities Carried at Fair Value 0   0   218  
Debt Securities Carried at Fair Value:            
Debt Securities Carried at Fair Value 12,441   12,441      
Residential Mortgage Backed Securities [Member]
            
Available-for-sale Debt Securities:            
Amortized Cost 4,818 [2]   4,818 [2]   6,124 [2]  
Gross Unrealized Gains 272 [2]   272 [2]   238 [2]  
Gross Unrealized Losses (84) [2]   (84) [2]   (123) [2]  
Debt securities carried at fair value 5,006 [2]   5,006 [2]   6,239 [2]  
Other Debt Securities, Carried at Fair Value:            
Other Debt Securities Carried at Fair Value 3,401   3,401   0  
Debt Securities Carried at Fair Value:            
Debt Securities Carried at Fair Value 8,407   8,407      
Residential Mortgage Backed Securities [Member] | Prime Loan [Member]
            
Table Details [Abstract]            
Available-for-sale securities, percent held by rating 78.00%   78.00%   89.00%  
Residential Mortgage Backed Securities [Member] | Alt-A Loan [Member]
            
Table Details [Abstract]            
Available-for-sale securities, percent held by rating 13.00%   13.00%   7.00%  
Residential Mortgage Backed Securities [Member] | Subprime Loan [Member]
            
Table Details [Abstract]            
Available-for-sale securities, percent held by rating 9.00%   9.00%   4.00%  
Commercial Mortgage Backed Securities [Member]
            
Available-for-sale Debt Securities:            
Amortized Cost 2,240   2,240   2,429  
Gross Unrealized Gains 39   39   63  
Gross Unrealized Losses (1)   (1)   (12)  
Debt securities carried at fair value 2,278   2,278   2,480  
Other Debt Securities, Carried at Fair Value:            
Other Debt Securities Carried at Fair Value 793   793   749  
Debt Securities Carried at Fair Value:            
Debt Securities Carried at Fair Value 3,071   3,071      
Foreign Securities [Member]
            
Available-for-sale Debt Securities:            
Amortized Cost 7,034   7,034   7,207  
Gross Unrealized Gains 40   40   37  
Gross Unrealized Losses (5)   (5)   (24)  
Debt securities carried at fair value 7,069   7,069   7,220  
Other Debt Securities, Carried at Fair Value:            
Other Debt Securities Carried at Fair Value 17,395 [3]   17,395 [3]   11,315 [3]  
Debt Securities Carried at Fair Value:            
Debt Securities Carried at Fair Value 24,464   24,464      
Corporate Bond Securities [Member]
            
Available-for-sale Debt Securities:            
Amortized Cost 813   813   860  
Gross Unrealized Gains 18   18   20  
Gross Unrealized Losses (3)   (3)   (7)  
Debt securities carried at fair value 828   828   873  
Debt Securities Carried at Fair Value:            
Debt Securities Carried at Fair Value 828   828      
Other Debt Obligations [Member]
            
Available-for-sale Debt Securities:            
Amortized Cost 13,587   13,587   16,805  
Gross Unrealized Gains 38   38   30  
Gross Unrealized Losses (10)   (10)   (5)  
Debt securities carried at fair value 13,615   13,615   16,830  
Other Debt Securities, Carried at Fair Value:            
Other Debt Securities Carried at Fair Value 310   310   0  
Debt Securities Carried at Fair Value:            
Debt Securities Carried at Fair Value 13,925   13,925      
Taxable Securities [Member]
            
Available-for-sale Debt Securities:            
Amortized Cost 240,915   240,915   235,178  
Gross Unrealized Gains 2,411   2,411   1,347  
Gross Unrealized Losses (1,843)   (1,843)   (6,502)  
Debt securities carried at fair value 241,483   241,483   230,023  
Debt Securities Carried at Fair Value:            
Debt Securities Carried at Fair Value 284,072   284,072      
Tax-exempt securities [Member]
            
Available-for-sale Debt Securities:            
Amortized Cost 8,802   8,802   5,967  
Gross Unrealized Gains 5   5   10  
Gross Unrealized Losses (18)   (18)   (49)  
Debt securities carried at fair value 8,789   8,789   5,928  
Debt Securities Carried at Fair Value:            
Debt Securities Carried at Fair Value 8,789   8,789      
Debt [Member]
            
Available-for-sale Debt Securities:            
Amortized Cost 249,717   249,717   241,145  
Gross Unrealized Gains 2,416   2,416   1,357  
Gross Unrealized Losses (1,861)   (1,861)   (6,551)  
Debt securities carried at fair value 250,272   250,272   235,951  
In Text Details [Abstract]            
Related Income Tax Benefit     2,421 (2,799)    
Debt [Member] | Available-for-sale debt securities [Member]
            
In Text Details [Abstract]            
Accumulated other comprehensive income (loss) 355 (645) 355 (645) (3,257) 4,443
Equity securities [Member]
            
Available-for-sale Equity Securities:            
Amortized Cost 276 [4]   276 [4]   230 [4]  
Gross Unrealized Gains 0 [4]   0 [4]   0 [4]  
Gross Unrealized Losses (36) [4]   (36) [4]   (7) [4]  
Fair Value $ 240 [4]   $ 240 [4]   $ 223 [4]  
[1] Substantially all U.S. agency MBS.
[2] At June 30, 2014 and December 31, 2013, the underlying collateral type included approximately 78 percent and 89 percent prime, 13 percent and seven percent Alt-A, and nine percent and four percent subprime.
[3] These securities are primarily used to satisfy certain international regulatory liquidity requirements.
[4] Classified in other assets on the Consolidated Balance Sheet.