Annual report pursuant to Section 13 and 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 $)
 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2013
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Dec. 31, 2013
US Government Corporations and Agencies Securities [Member]
Dec. 31, 2012
US Government Corporations and Agencies Securities [Member]
Dec. 31, 2013
Agency MBS [Member]
Dec. 31, 2012
Agency MBS [Member]
Dec. 31, 2013
Collateralized Mortgage Obligations [Member]
Dec. 31, 2012
Collateralized Mortgage Obligations [Member]
Dec. 31, 2013
Residential Mortgage Backed Securities [Member]
Dec. 31, 2012
Residential Mortgage Backed Securities [Member]
Dec. 31, 2013
Residential Mortgage Backed Securities [Member]
Prime Loan [Member]
Dec. 31, 2012
Residential Mortgage Backed Securities [Member]
Prime Loan [Member]
Dec. 31, 2013
Residential Mortgage Backed Securities [Member]
Alt-A Loan [Member]
Dec. 31, 2012
Residential Mortgage Backed Securities [Member]
Alt-A Loan [Member]
Dec. 31, 2013
Residential Mortgage Backed Securities [Member]
Subprime Loan [Member]
Dec. 31, 2012
Residential Mortgage Backed Securities [Member]
Subprime Loan [Member]
Dec. 31, 2013
Commercial Mortgage Backed Securities [Member]
Dec. 31, 2012
Commercial Mortgage Backed Securities [Member]
Dec. 31, 2013
Non United States Securities [Member]
Dec. 31, 2012
Non United States Securities [Member]
Dec. 31, 2013
Corporate Bond Securities [Member]
Dec. 31, 2012
Corporate Bond Securities [Member]
Dec. 31, 2013
Other Debt Obligations [Member]
Dec. 31, 2012
Other Debt Obligations [Member]
Dec. 31, 2013
Taxable Securities [Member]
Dec. 31, 2012
Taxable Securities [Member]
Dec. 31, 2013
Tax-exempt securities [Member]
Dec. 31, 2012
Tax-exempt securities [Member]
Dec. 31, 2013
Debt [Member]
Dec. 31, 2012
Debt [Member]
Dec. 31, 2011
Debt [Member]
Dec. 31, 2012
Debt [Member]
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Dec. 31, 2011
Debt [Member]
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Dec. 31, 2010
Debt [Member]
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Dec. 31, 2013
Equity Securities [Member]
Dec. 31, 2012
Equity Securities [Member]
Available-for-sale Debt Securities:                                                                              
Amortized Cost           $ 8,910,000,000 $ 24,232,000,000 $ 170,112,000,000 $ 183,247,000,000 $ 22,731,000,000 $ 36,329,000,000 $ 6,124,000,000 [1] $ 9,231,000,000 [1]             $ 2,429,000,000 $ 3,576,000,000 $ 7,207,000,000 $ 5,574,000,000 $ 860,000,000 $ 1,415,000,000 $ 16,805,000,000 $ 12,089,000,000 $ 235,178,000,000 $ 275,693,000,000 $ 5,967,000,000 $ 4,167,000,000 $ 241,145,000,000 $ 279,860,000,000            
Gross Unrealized Gains           106,000,000 324,000,000 777,000,000 5,048,000,000 76,000,000 1,427,000,000 238,000,000 [1] 391,000,000 [1]             63,000,000 348,000,000 37,000,000 50,000,000 20,000,000 51,000,000 30,000,000 54,000,000 1,347,000,000 7,693,000,000 10,000,000 13,000,000 1,357,000,000 7,706,000,000            
Gross Unrealized Losses           (62,000,000) (84,000,000) (5,954,000,000) (146,000,000) (315,000,000) (218,000,000) (123,000,000) [1] (128,000,000) [1]             (12,000,000) 0 (24,000,000) (6,000,000) (7,000,000) (16,000,000) (5,000,000) (15,000,000) (6,502,000,000) (613,000,000) (49,000,000) (47,000,000) (6,551,000,000) (660,000,000)            
Debt securities carried at fair value 268,795,000,000 310,850,000,000       8,954,000,000 24,472,000,000 164,935,000,000 188,149,000,000 22,492,000,000 37,538,000,000 6,239,000,000 [1] 9,494,000,000 [1]             2,480,000,000 3,924,000,000 7,220,000,000 5,618,000,000 873,000,000 1,450,000,000 16,830,000,000 12,128,000,000 230,023,000,000 282,773,000,000 5,928,000,000 4,133,000,000 235,951,000,000 286,906,000,000            
Other Debt Securities, Carried at Fair Value:                                                                              
Amortized Cost 34,145,000,000 23,927,000,000                                                                          
Gross Unrealized Gains 34,000,000 120,000,000                                                                          
Gross Unrealized Losses (1,335,000,000) (103,000,000)                                                                          
Other Debt Securities Carried at Fair Value 32,844,000,000 23,944,000,000       4,062,000,000 491,000,000 16,500,000,000 13,073,000,000 218,000,000 929,000,000                 749,000,000 0 11,315,000,000 [2] 9,451,000,000 [2]                                
Debt Securities Carried at Fair Value:                                                                              
Amortized Cost 275,290,000,000 303,787,000,000                                                                          
Gross Unrealized Gains 1,391,000,000 7,826,000,000                                                                          
Gross Unrealized Losses (7,886,000,000) (763,000,000)                                                                          
Debt Securities Carried at Fair Value 268,795,000,000 310,850,000,000       13,016,000,000   181,435,000,000   22,710,000,000   6,239,000,000               3,229,000,000       873,000,000   16,830,000,000   262,867,000,000   5,928,000,000                  
Held-to-maturity Securities:                                                                              
Amortized Cost 55,150,000,000 [3] 49,481,000,000                                                                          
Gross Unrealized Gains 20,000,000 815,000,000                                                                          
Gross Unrealized Losses (2,740,000,000) (26,000,000)                                                                          
Held-to-maturity, at cost, fair value 52,430,000,000 [3] 50,270,000,000                                                                          
Debt Securities:                                                                              
Amortized Cost 330,440,000,000 353,268,000,000                                                                          
Gross Unrealized Gains 1,411,000,000 8,641,000,000                                                                          
Gross Unrealized Losses (10,626,000,000) (789,000,000)                                                                          
Debt Securities, Fair Value 321,225,000,000 361,120,000,000                                                                          
Available-for-sale Equity Securities [Abstract]                                                                              
Amortized Cost                                                                           230,000,000 [4] 780,000,000 [4]
Gross Unrealized Gains                                                                           0 [4] 732,000,000 [4]
Gross Unrealized Losses                                                                           (7,000,000) [4] 0 [4]
Fair value                                                                           223,000,000 [4] 1,512,000,000 [4]
Table Details [Abstract]                                                                              
Available-for-sale Securities, Debt Maturities, Percent Held by Rating                           89.00% 91.00% 7.00% 6.00% 4.00% 3.00%                                        
In Text Details [Abstract]                                                                              
Accumulated other comprehensive income (loss) (8,457,000,000) (2,797,000,000) (5,437,000,000) (66,000,000) (3,257,000,000)                                                           4,443,000,000 3,100,000,000 714,000,000    
Related Income Tax Benefit (1,900,000,000)                                                             (4,077,000,000) 1,319,000,000 2,590,000,000          
Nonperforming Debt Securities 103,000,000 91,000,000                                                                          
Unrealized Mark-to-Market Net Losses in other Income (Loss) (1,300,000,000)                                                                            
Realized Losses on Other Debt Securities $ (1,000,000,000)                                                                            
[1] At December 31, 2013 and 2012, the underlying collateral type included approximately 89 percent and 91 percent prime, seven percent and six percent Alt-A, and four percent and three percent subprime.
[2] These securities are primarily used to satisfy certain international regulatory liquidity requirements.
[3] Substantially all U.S. agency MBS.
[4] Classified in other assets on the Consolidated Balance Sheet.