Annual report pursuant to Section 13 and 15(d)

Securities - Gross Unrealized Losses (Details)

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Securities - Gross Unrealized Losses (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Securities
Dec. 31, 2012
Securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value $ 154,358 [1],[2] $ 26,336 [1],[2]
Less than Twelve Months, Gross Unrealized Losses (5,791) [1],[2] (279) [1],[2]
Twelve Months or Longer, Fair Value 14,839 [1],[2] 16,314 [1],[2]
Twelve Months or Longer, Gross Unrealized Losses (760) [1],[2] (381) [1],[2]
Total, Fair Value 169,197 [1],[2] 42,650 [1],[2]
Total, Gross Unrealized Losses (6,551) [1],[2] (660) [1],[2]
Table Details [Abstract]    
Number of Available for Sale Securities Amortized Cost Exceeds Fair Value 4,700 2,600
Available for Sale Securities Amortized Cost Exceeding Fair Value 6,600 660
Temporarily Impaired [Member] | US Government Corporations and Agencies Securities [Member]
   
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 5,770 0
Less than Twelve Months, Gross Unrealized Losses (61) 0
Twelve Months or Longer, Fair Value 19 5,608
Twelve Months or Longer, Gross Unrealized Losses (1) (84)
Total, Fair Value 5,789 5,608
Total, Gross Unrealized Losses (62) (84)
Temporarily Impaired [Member] | Debt Securities [Member]
   
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 154,356 26,322
Less than Twelve Months, Gross Unrealized Losses (5,790) (278)
Twelve Months or Longer, Fair Value 14,838 16,240
Twelve Months or Longer, Gross Unrealized Losses (759) (377)
Total, Fair Value 169,194 42,562
Total, Gross Unrealized Losses (6,549) (655)
Temporarily Impaired [Member] | Agency MBS [Member]
   
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 132,032 15,593
Less than Twelve Months, Gross Unrealized Losses (5,457) (133)
Twelve Months or Longer, Fair Value 9,324 735
Twelve Months or Longer, Gross Unrealized Losses (497) (13)
Total, Fair Value 141,356 16,328
Total, Gross Unrealized Losses (5,954) (146)
Temporarily Impaired [Member] | Collateralized Mortgage Obligations [Member]
   
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 13,438 5,135
Less than Twelve Months, Gross Unrealized Losses (210) (121)
Twelve Months or Longer, Fair Value 2,661 4,994
Twelve Months or Longer, Gross Unrealized Losses (105) (97)
Total, Fair Value 16,099 10,129
Total, Gross Unrealized Losses (315) (218)
Temporarily Impaired [Member] | Residential Mortgage Backed Securities [Member]
   
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 819 592
Less than Twelve Months, Gross Unrealized Losses (15) (13)
Twelve Months or Longer, Fair Value 1,237 1,555
Twelve Months or Longer, Gross Unrealized Losses (106) (110)
Total, Fair Value 2,056 2,147
Total, Gross Unrealized Losses (121) (123)
Temporarily Impaired [Member] | Commercial Mortgage Backed Securities [Member]
   
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 286  
Less than Twelve Months, Gross Unrealized Losses (12)  
Twelve Months or Longer, Fair Value 0  
Twelve Months or Longer, Gross Unrealized Losses 0  
Total, Fair Value 286  
Total, Gross Unrealized Losses (12)  
Temporarily Impaired [Member] | Foreign Securities [Member]
   
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 0 1,715
Less than Twelve Months, Gross Unrealized Losses 0 (1)
Twelve Months or Longer, Fair Value 45 563
Twelve Months or Longer, Gross Unrealized Losses (24) (5)
Total, Fair Value 45 2,278
Total, Gross Unrealized Losses (24) (6)
Temporarily Impaired [Member] | Corporate Bond Securities [Member]
   
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 106 0
Less than Twelve Months, Gross Unrealized Losses (3) 0
Twelve Months or Longer, Fair Value 282 277
Twelve Months or Longer, Gross Unrealized Losses (4) (16)
Total, Fair Value 388 277
Total, Gross Unrealized Losses (7) (16)
Temporarily Impaired [Member] | Other Debt Obligations [Member]
   
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 116 1,678
Less than Twelve Months, Gross Unrealized Losses (2) (1)
Twelve Months or Longer, Fair Value 280 1,436
Twelve Months or Longer, Gross Unrealized Losses (3) (14)
Total, Fair Value 396 3,114
Total, Gross Unrealized Losses (5) (15)
Temporarily Impaired [Member] | Taxable Securities [Member]
   
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 152,567 24,713
Less than Twelve Months, Gross Unrealized Losses (5,760) (269)
Twelve Months or Longer, Fair Value 13,848 15,168
Twelve Months or Longer, Gross Unrealized Losses (740) (339)
Total, Fair Value 166,415 39,881
Total, Gross Unrealized Losses (6,500) (608)
Temporarily Impaired [Member] | Tax-exempt securities [Member]
   
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 1,789 1,609
Less than Twelve Months, Gross Unrealized Losses (30) (9)
Twelve Months or Longer, Fair Value 990 1,072
Twelve Months or Longer, Gross Unrealized Losses (19) (38)
Total, Fair Value 2,779 2,681
Total, Gross Unrealized Losses (49) (47)
Other Than Temporarily Impaired [Member] | Residential Mortgage Backed Securities [Member]
   
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 2 [2] 14 [2]
Less than Twelve Months, Gross Unrealized Losses (1) [2] (1) [2]
Twelve Months or Longer, Fair Value 1 [2] 74 [2]
Twelve Months or Longer, Gross Unrealized Losses (1) [2] (4) [2]
Total, Fair Value 3 [2] 88 [2]
Total, Gross Unrealized Losses $ (2) [2] $ (5) [2]
[1] At December 31, 2013 and 2012, the amortized cost of approximately 4,700 and 2,600 AFS debt securities exceeded their fair value by $6.6 billion and $660 million.
[2] Includes other-than-temporarily impaired AFS debt securities on which an OTTI loss remains in accumulated OCI.