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
Jun. 30, 2016
Dec. 31, 2015
Debt securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value $ 5,867 $ 148,632
Less than Twelve Months, Gross Unrealized Losses (48) (1,428)
Twelve Months or Longer, Fair Value 8,115 20,346
Twelve Months or Longer, Gross Unrealized Losses (130) (596)
Total, Fair Value 13,982 168,978
Total, Gross Unrealized Losses (178) (2,024)
Temporarily impaired AFS debt securities | Debt securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 5,640 148,151
Less than Twelve Months, Gross Unrealized Losses (36) (1,409)
Twelve Months or Longer, Fair Value 7,733 20,248
Twelve Months or Longer, Gross Unrealized Losses (101) (582)
Total, Fair Value 13,373 168,399
Total, Gross Unrealized Losses (137) (1,991)
Temporarily impaired AFS debt securities | Agency    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 43 131,511
Less than Twelve Months, Gross Unrealized Losses (1) (1,245)
Twelve Months or Longer, Fair Value 1,277 14,895
Twelve Months or Longer, Gross Unrealized Losses (12) (443)
Total, Fair Value 1,320 146,406
Total, Gross Unrealized Losses (13) (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 526 1,637
Twelve Months or Longer, Gross Unrealized Losses (5) (62)
Total, Fair Value 526 2,908
Total, Gross Unrealized Losses (5) (71)
Temporarily impaired AFS debt securities | Commercial    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 297 4,066
Less than Twelve Months, Gross Unrealized Losses (5) (61)
Twelve Months or Longer, Fair Value 0 0
Twelve Months or Longer, Gross Unrealized Losses 0 0
Total, Fair Value 297 4,066
Total, Gross Unrealized Losses (5) (61)
Temporarily impaired AFS debt securities | Non-agency residential    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 104 553
Less than Twelve Months, Gross Unrealized Losses (4) (5)
Twelve Months or Longer, Fair Value 545 723
Twelve Months or Longer, Gross Unrealized Losses (23) (32)
Total, Fair Value 649 1,276
Total, Gross Unrealized Losses (27) (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 444 137,401
Less than Twelve Months, Gross Unrealized Losses (10) (1,320)
Twelve Months or Longer, Fair Value 2,348 17,255
Twelve Months or Longer, Gross Unrealized Losses (40) (537)
Total, Fair Value 2,792 154,656
Total, Gross Unrealized Losses (50) (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 1,015 0
Less than Twelve Months, Gross Unrealized Losses (5) 0
Twelve Months or Longer, Fair Value 135 134
Twelve Months or Longer, Gross Unrealized Losses (2) (3)
Total, Fair Value 1,150 134
Total, Gross Unrealized Losses (7) (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 2,142 5,178
Less than Twelve Months, Gross Unrealized Losses (14) (72)
Twelve Months or Longer, Fair Value 3,348 792
Twelve Months or Longer, Gross Unrealized Losses (35) (17)
Total, Fair Value 5,490 5,970
Total, Gross Unrealized Losses (49) (89)
Temporarily impaired AFS debt securities | Total taxable securities    
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]    
Less than Twelve Months, Fair Value 3,601 143,751
Less than Twelve Months, Gross Unrealized Losses (29) (1,397)
Twelve Months or Longer, Fair Value 5,831 18,371
Twelve Months or Longer, Gross Unrealized Losses (77) (561)
Total, Fair Value 9,432 162,122
Total, Gross Unrealized Losses (106) (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 2,039 4,400
Less than Twelve Months, Gross Unrealized Losses (7) (12)
Twelve Months or Longer, Fair Value 1,902 1,877
Twelve Months or Longer, Gross Unrealized Losses (24) (21)
Total, Fair Value 3,941 6,277
Total, Gross Unrealized Losses (31) (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 227 481
Less than Twelve Months, Gross Unrealized Losses (12) (19)
Twelve Months or Longer, Fair Value 382 98
Twelve Months or Longer, Gross Unrealized Losses (29) (14)
Total, Fair Value 609 579
Total, Gross Unrealized Losses $ (41) $ (33)