Quarterly report pursuant to Section 13 or 15(d)

Securities - Gross Unrealized Losses (Details)

v3.5.0.2
Securities - Gross Unrealized Losses (Details) - USD ($)
$ in Millions
Sep. 30, 2016
Dec. 31, 2015
Debt securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value $ 11,873 $ 134,167
Less than Twelve Months, Gross Unrealized Losses (32) (1,274)
Twelve Months or Longer, Fair Value 8,520 18,186
Twelve Months or Longer, Gross Unrealized Losses (125) (516)
Total, Fair Value 20,393 152,353
Total, Gross Unrealized Losses (157) (1,790)
Temporarily impaired AFS debt securities | Debt securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 11,852 133,686
Less than Twelve Months, Gross Unrealized Losses (31) (1,255)
Twelve Months or Longer, Fair Value 8,133 18,088
Twelve Months or Longer, Gross Unrealized Losses (104) (502)
Total, Fair Value 19,985 151,774
Total, Gross Unrealized Losses (135) (1,757)
Temporarily impaired AFS debt securities | Agency    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 1,591 115,502
Less than Twelve Months, Gross Unrealized Losses (2) (1,082)
Twelve Months or Longer, Fair Value 4,105 13,083
Twelve Months or Longer, Gross Unrealized Losses (21) (388)
Total, Fair Value 5,696 128,585
Total, Gross Unrealized Losses (23) (1,470)
Temporarily impaired AFS debt securities | Agency-collateralized mortgage obligations    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 604 2,536
Less than Twelve Months, Gross Unrealized Losses (3) (19)
Twelve Months or Longer, Fair Value 1,133 1,212
Twelve Months or Longer, Gross Unrealized Losses (21) (36)
Total, Fair Value 1,737 3,748
Total, Gross Unrealized Losses (24) (55)
Temporarily impaired AFS debt securities | Commercial    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 941 4,587
Less than Twelve Months, Gross Unrealized Losses (2) (65)
Twelve Months or Longer, Fair Value 0 0
Twelve Months or Longer, Gross Unrealized Losses 0 0
Total, Fair Value 941 4,587
Total, Gross Unrealized Losses (2) (65)
Temporarily impaired AFS debt securities | Non-agency residential    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 0 553
Less than Twelve Months, Gross Unrealized Losses 0 (5)
Twelve Months or Longer, Fair Value 237 723
Twelve Months or Longer, Gross Unrealized Losses (16) (33)
Total, Fair Value 237 1,276
Total, Gross Unrealized Losses (16) (38)
Temporarily impaired AFS debt securities | Total mortgage-backed securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 3,136 123,178
Less than Twelve Months, Gross Unrealized Losses (7) (1,171)
Twelve Months or Longer, Fair Value 5,475 15,018
Twelve Months or Longer, Gross Unrealized Losses (58) (457)
Total, Fair Value 8,611 138,196
Total, Gross Unrealized Losses (65) (1,628)
Temporarily impaired AFS debt securities | U.S. Treasury and agency securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 2,213 1,172
Less than Twelve Months, Gross Unrealized Losses (4) (5)
Twelve Months or Longer, Fair Value 0 190
Twelve Months or Longer, Gross Unrealized Losses 0 (4)
Total, Fair Value 2,213 1,362
Total, Gross Unrealized Losses (4) (9)
Temporarily impaired AFS debt securities | Non-U.S. securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 273 0
Less than Twelve Months, Gross Unrealized Losses (1) 0
Twelve Months or Longer, Fair Value 133 134
Twelve Months or Longer, Gross Unrealized Losses (3) (3)
Total, Fair Value 406 134
Total, Gross Unrealized Losses (4) (3)
Temporarily impaired AFS debt securities | Other taxable securities, substantially all asset-backed securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 3,499 4,936
Less than Twelve Months, Gross Unrealized Losses (8) (67)
Twelve Months or Longer, Fair Value 1,448 869
Twelve Months or Longer, Gross Unrealized Losses (24) (17)
Total, Fair Value 4,947 5,805
Total, Gross Unrealized Losses (32) (84)
Temporarily impaired AFS debt securities | Total taxable securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 9,121 129,286
Less than Twelve Months, Gross Unrealized Losses (20) (1,243)
Twelve Months or Longer, Fair Value 7,056 16,211
Twelve Months or Longer, Gross Unrealized Losses (85) (481)
Total, Fair Value 16,177 145,497
Total, Gross Unrealized Losses (105) (1,724)
Temporarily impaired AFS debt securities | Tax-exempt securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 2,731 4,400
Less than Twelve Months, Gross Unrealized Losses (11) (12)
Twelve Months or Longer, Fair Value 1,077 1,877
Twelve Months or Longer, Gross Unrealized Losses (19) (21)
Total, Fair Value 3,808 6,277
Total, Gross Unrealized Losses (30) (33)
Other-than-temporarily impaired AFS debt securities | Non-agency residential    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 21 481
Less than Twelve Months, Gross Unrealized Losses (1) (19)
Twelve Months or Longer, Fair Value 387 98
Twelve Months or Longer, Gross Unrealized Losses (21) (14)
Total, Fair Value 408 579
Total, Gross Unrealized Losses $ (22) $ (33)