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Securities (Investment Securities) (Detail) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Investment Holdings    
Available-for-sale debt securities, fair value [1] $ 35,048 $ 32,830
Available-for-sale debt securities, unrealized losses (170) (464)
Available-for-sale debt securities, unrealized gains 434 166
Available-for-sale debt securities, amortized cost 34,784 33,128
Held-to-maturity securities, fair value 21 18
Held-to-maturity, unrealized losses 0 0
Held-to-maturity, unrealized gains 0 0
Held-to-maturity securities, amortized cost [2] 21 18
Trading debt securities, fair value 325 287
Equity securities, fair value 426 452
U.S. Treasury and federal agency    
Investment Holdings    
Available-for-sale debt securities, fair value 797 97
Available-for-sale debt securities, unrealized losses 0 (1)
Available-for-sale debt securities, unrealized gains 1 0
Available-for-sale debt securities, amortized cost 796 98
Obligations of states and political subdivisions    
Investment Holdings    
Available-for-sale debt securities, fair value 6 2
Available-for-sale debt securities, unrealized losses 0 0
Available-for-sale debt securities, unrealized gains 0 0
Available-for-sale debt securities, amortized cost 6 2
Held-to-maturity securities, fair value 16 16
Held-to-maturity, unrealized losses 0 0
Held-to-maturity, unrealized gains 0 0
Held-to-maturity securities, amortized cost 16 16
Agency mortgage-backed securities | Residential mortgage backed securities    
Investment Holdings    
Available-for-sale debt securities, fair value 15,689 16,247
Available-for-sale debt securities, unrealized losses (102) (242)
Available-for-sale debt securities, unrealized gains 177 86
Available-for-sale debt securities, amortized cost 15,614 16,403
Agency mortgage-backed securities | Commercial mortgage backed securities    
Investment Holdings    
Available-for-sale debt securities, fair value 12,513 10,650
Available-for-sale debt securities, unrealized losses (50) (164)
Available-for-sale debt securities, unrealized gains 181 44
Available-for-sale debt securities, amortized cost 12,382 10,770
Non-agency mortgage-backed securities | Commercial mortgage backed securities    
Investment Holdings    
Available-for-sale debt securities, fair value 3,375 3,267
Available-for-sale debt securities, unrealized losses (6) (47)
Available-for-sale debt securities, unrealized gains 43 9
Available-for-sale debt securities, amortized cost 3,338 3,305
Asset-backed securities and other debt securities    
Investment Holdings    
Available-for-sale debt securities, fair value 2,087 2,015
Available-for-sale debt securities, unrealized losses (12) (10)
Available-for-sale debt securities, unrealized gains 32 27
Available-for-sale debt securities, amortized cost 2,067 1,998
Held-to-maturity securities, fair value 5 2
Held-to-maturity, unrealized losses 0 0
Held-to-maturity, unrealized gains 0 0
Held-to-maturity securities, amortized cost 5 2
Other securities    
Investment Holdings    
Available-for-sale debt securities, fair value 581 [3] 552 [4]
Available-for-sale debt securities, unrealized losses 0 0
Available-for-sale debt securities, unrealized gains 0 0
Available-for-sale debt securities, amortized cost $ 581 [3] $ 552 [4]
[1]
  • Amortized cost of $ 34,784 and $ 33,128 at March 31, 2019 and December 31, 2018 , respectively.
[2]

Fair value of $ 21 and $ 18 at March 31, 2019 and December 31, 2018 , respectively.

[3]

Other securities consist of FHLB, FRB and DTCC restricted stock holdings of $ 137 , $ 442 and $ 2 , respectively, at March 31, 2019 , that are carried at cost.

[4]

Other securities consist of FHLB, FRB and DTCC restricted stock holdings of $ 184 , $ 366 and $ 2 , respectively, at December 31, 2018 , that are carried at cost.