XML 122 R105.htm IDEA: XBRL DOCUMENT v3.10.0.1
Interest Rate Risk Managment (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Fair Value Hedging [Member] | Interest rate contract    
Derivative [Line Items]    
Derivative, Notional Amount $ 10,575 $ 9,575