Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefit — opening balance	$ 37.9	$ 48.8	$ 63.3
Gross increases — tax positions in prior period	1.6	3.6	14.1
Gross decreases — tax positions in prior period	(0.3)	(9.3)	(7.6)
Gross increases — tax positions in current period	0.3	0.7	11.3
Settlements	(1.3)	0.0	0.0
Lapse of statute of limitations	(7.1)	(5.9)	(4.4)
Gross decreases — Spin-Off	0.0	0.0	(26.7)
Increase resulting from foreign currency translation	0.2
Change due to foreign currency exchange rates		0.0	(1.2)
Unrecognized tax benefit — ending balance	$ 31.3	$ 37.9	$ 48.8