CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 11.8	$ (60.0)	$ 49.8	$ (83.6)
Other comprehensive (loss) income
Foreign currency translation adjustments	(377.8)	(37.3)	(318.6)	143.3
Pension and post-retirement plans:
Total pension and post-retirement plans	0.0	0.0	0.0	(0.3)
Unrealized loss on available for sale securities:
Other comprehensive loss before reclassifications, net of tax of $0.0 for the three and six months ended June 30, 2017		(1.3)		(1.7)
Derivative financial instruments revaluation:
Other comprehensive income (loss) before reclassifications, net of tax of $0.9 and $0.0 for the three months ended June 30, 2018 and 2017, and $3.1 and $0.0 for the six months ended June 30, 2018 and 2017, respectively	10.4	(4.8)	7.8	(6.2)
Reclassifications, net of tax of $0.0 for the three and six months ended June 30, 2018 and 2017, respectively	(7.9)	3.0	0.9	6.0
Total unrealized gain (loss) arising on qualified hedging derivatives	2.5	(1.8)	8.7	(0.2)
Other comprehensive (loss) income	(375.3)	(40.4)	(309.9)	141.1
Comprehensive (loss) income	(363.5)	(100.4)	(260.1)	57.5
Comprehensive loss (income) attributable to the non-controlling interests	35.1	4.0	32.8	(2.2)
Comprehensive (loss) income attributable to common stockholders	$ (328.4)	$ (96.4)	$ (227.3)	$ 55.3