XML 131 R93.htm IDEA: XBRL DOCUMENT v3.10.0.1
Debt and Capital Leases - Interest Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Debt Disclosure [Abstract]      
Interest expense on term loan and credit facility $ 21 $ 15 $ 12
Interest expense on capital leases $ 1 $ 0 $ 0