Quarterly report pursuant to Section 13 or 15(d)

Securities - Gross Unrealized Losses (Details)

v3.4.0.3
Securities - Gross Unrealized Losses (Details) - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
Debt securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value $ 10,608 $ 148,632
Less than Twelve Months, Gross Unrealized Losses (138) (1,428)
Twelve Months or Longer, Fair Value 14,356 20,346
Twelve Months or Longer, Gross Unrealized Losses (170) (596)
Total, Fair Value 24,964 168,978
Total, Gross Unrealized Losses (308) (2,024)
Temporarily impaired AFS debt securities | Debt securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 10,144 148,151
Less than Twelve Months, Gross Unrealized Losses (111) (1,409)
Twelve Months or Longer, Fair Value 14,198 20,248
Twelve Months or Longer, Gross Unrealized Losses (149) (582)
Total, Fair Value 24,342 168,399
Total, Gross Unrealized Losses (260) (1,991)
Temporarily impaired AFS debt securities | Agency    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 1,435 131,511
Less than Twelve Months, Gross Unrealized Losses (5) (1,245)
Twelve Months or Longer, Fair Value 10,087 14,895
Twelve Months or Longer, Gross Unrealized Losses (73) (443)
Total, Fair Value 11,522 146,406
Total, Gross Unrealized Losses (78) (1,688)
Temporarily impaired AFS debt securities | Agency-collateralized mortgage obligations    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 0 1,271
Less than Twelve Months, Gross Unrealized Losses 0 (9)
Twelve Months or Longer, Fair Value 1,231 1,637
Twelve Months or Longer, Gross Unrealized Losses (13) (62)
Total, Fair Value 1,231 2,908
Total, Gross Unrealized Losses (13) (71)
Temporarily impaired AFS debt securities | Commercial    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 339 4,066
Less than Twelve Months, Gross Unrealized Losses (1) (61)
Twelve Months or Longer, Fair Value 0 0
Twelve Months or Longer, Gross Unrealized Losses 0 0
Total, Fair Value 339 4,066
Total, Gross Unrealized Losses (1) (61)
Temporarily impaired AFS debt securities | Non-agency residential    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 386 553
Less than Twelve Months, Gross Unrealized Losses (5) (5)
Twelve Months or Longer, Fair Value 318 723
Twelve Months or Longer, Gross Unrealized Losses (24) (32)
Total, Fair Value 704 1,276
Total, Gross Unrealized Losses (29) (37)
Temporarily impaired AFS debt securities | Total mortgage-backed securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 2,160 137,401
Less than Twelve Months, Gross Unrealized Losses (11) (1,320)
Twelve Months or Longer, Fair Value 11,636 17,255
Twelve Months or Longer, Gross Unrealized Losses (110) (537)
Total, Fair Value 13,796 154,656
Total, Gross Unrealized Losses (121) (1,857)
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   1,172
Less than Twelve Months, Gross Unrealized Losses   (5)
Twelve Months or Longer, Fair Value   190
Twelve Months or Longer, Gross Unrealized Losses   (4)
Total, Fair Value   1,362
Total, Gross Unrealized Losses   (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 58 0
Less than Twelve Months, Gross Unrealized Losses (1) 0
Twelve Months or Longer, Fair Value 147 134
Twelve Months or Longer, Gross Unrealized Losses (4) (3)
Total, Fair Value 205 134
Total, Gross Unrealized Losses (5) (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 5,600 5,178
Less than Twelve Months, Gross Unrealized Losses (87) (72)
Twelve Months or Longer, Fair Value 838 792
Twelve Months or Longer, Gross Unrealized Losses (12) (17)
Total, Fair Value 6,438 5,970
Total, Gross Unrealized Losses (99) (89)
Temporarily impaired AFS debt securities | Total taxable securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 7,818 143,751
Less than Twelve Months, Gross Unrealized Losses (99) (1,397)
Twelve Months or Longer, Fair Value 12,621 18,371
Twelve Months or Longer, Gross Unrealized Losses (126) (561)
Total, Fair Value 20,439 162,122
Total, Gross Unrealized Losses (225) (1,958)
Temporarily impaired AFS debt securities | Tax-exempt securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 2,326 4,400
Less than Twelve Months, Gross Unrealized Losses (12) (12)
Twelve Months or Longer, Fair Value 1,577 1,877
Twelve Months or Longer, Gross Unrealized Losses (23) (21)
Total, Fair Value 3,903 6,277
Total, Gross Unrealized Losses (35) (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 464 481
Less than Twelve Months, Gross Unrealized Losses (27) (19)
Twelve Months or Longer, Fair Value 158 98
Twelve Months or Longer, Gross Unrealized Losses (21) (14)
Total, Fair Value 622 579
Total, Gross Unrealized Losses $ (48) $ (33)