XML 81 R66.htm IDEA: XBRL DOCUMENT v3.6.0.2
Property, Equipment and Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Property, Equipment and Intangible Assets [Abstract]            
Depreciation and amortization       $ 25 $ 22 $ 20
Amortization of Intangible Assets $ 3 $ 9 $ 16