XML 56 R46.htm IDEA: XBRL DOCUMENT v3.10.0.1
Investment Securities (Contractual Maturity Distribution Of Debt Securities) (Details) - USD ($)
$ in Millions
Sep. 30, 2018
Dec. 31, 2017
[1]
Investment securities available-for-sale, Amortized Cost $ 12,227 $ 11,061
Investment securities available-for-sale, Fair Value 11,862 $ 10,938
Debt securities    
Available-for-sale, Within one year, Amortized Cost 100  
Available-for-sale, After one year through five years, Amortized Cost 2,993  
Available-for-sale, After five years through ten years, Amortized Cost 1,634  
Available-for-sale, After ten years, Amortized Cost 7,500  
Investment securities available-for-sale, Amortized Cost 12,227  
Available-for-sale, Within one year, Fair Value 100  
Available-for-sale, After one year through five years, Fair Value 2,958  
Available-for-sale, After five years through ten years, Fair Value 1,598  
Available-for-sale, After ten years, Fair Value 7,206  
Investment securities available-for-sale, Fair Value $ 11,862  
[1] Included auction-rate securities at amortized cost and fair value of $51 million and $49 million, respectively, as of December 31, 2017.