XML 87 R49.htm IDEA: XBRL DOCUMENT v3.20.1
Financial Instruments (Schedule Of Investment Securities) (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Held to maturity    
Cost $ 28 $ 26
Unrealized Gains 0 0
Unrealized Losses 0 0
Securities held to maturity $ 28 $ 26