Income Taxes - Schedule of Unrecognized Tax Benefits Roll Forward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 25	$ 15	$ 12
Additions for tax positions of the current period	1	2	0
Additions for tax positions from acquisitions	0	0	10
Additions for tax positions of prior years	2	17	1
Reductions for tax positions of prior years	(3)	0	0
Settlements with tax authorities	0	(3)	0
Reductions due to the statute of limitations	(1)	(6)	(8)
Currency translation adjustment	(1)	0	0
Ending balance	23	25	15
Interest and penalties	6	5	4
Gross unrecognized tax benefits	29	30	19
Total UTB that, if recognized, would impact the effective income tax rate as of the end of the year	$ 22	$ 23	$ 11