Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 66.4	$ (11.6)	$ 210.4	$ 136.5
Other comprehensive loss, before tax:
Foreign currency translation adjustments	(52.8)	(17.6)	(40.4)	(86.9)
Unrealized (loss) gain on derivatives	(4.6)	3.6	(39.5)	16.2
Unrealized gain (loss) on pension plan obligations	0.5	0.6	1.0	(0.7)
Other comprehensive loss, before tax	(56.9)	(13.4)	(78.9)	(71.4)
Income tax (benefit) provision related to items of other comprehensive loss	(0.5)	0.6	(5.3)	2.3
Other comprehensive loss, net of tax	(56.4)	(14.0)	(73.6)	(73.7)
Comprehensive income (loss)	10.0	(25.6)	136.8	62.8
Less: Comprehensive income attributable to noncontrolling interests	0.3	0.3	5.2	1.7
Comprehensive income (loss) attributable to controlling interests	$ 9.7	$ (25.9)	$ 131.6	$ 61.1