CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Net sales	$ 904.3	$ 890.5	$ 2,707.2	$ 2,635.9
Cost of sales	533.2	515.4	1,557.8	1,524.1
Gross profit	371.1	375.1	1,149.4	1,111.8
Operating expenses:
Selling, technical, general and administrative	264.2	274.3	806.1	823.5
Research and development	23.4	20.9	70.1	61.3
Total operating expenses	287.6	295.2	876.2	884.8
Operating profit	83.5	79.9	273.2	227.0
Other (expense) income:
Interest expense, net	(85.6)	(98.5)	(260.0)	(289.7)
Foreign exchange loss	(24.9)	(10.3)	(97.4)	(56.5)
Other (expense) income, net	(1.8)	115.2	1.6	108.3
Total other (expense) income	(112.3)	6.4	(355.8)	(237.9)
(Loss) income before income taxes and non-controlling interests	(28.8)	86.3	(82.6)	(10.9)
Income tax expense	(37.5)	(20.4)	(67.3)	(65.7)
Net (loss) income	(66.3)	65.9	(149.9)	(76.6)
Net (income) loss attributable to the non-controlling interests	(2.9)	5.9	(4.8)	4.7
Net (loss) income attributable to stockholders	(69.2)	71.8	(154.7)	(71.9)
Gain on amendment of Series B Convertible Preferred Stock	0.0	32.9	0.0	32.9
Net (loss) income attributable to common stockholders	$ (69.2)	$ 104.7	$ (154.7)	$ (39.0)
(Loss) earnings per share
Basic (in dollars per share)	$ (0.24)	$ 0.45	$ (0.54)	$ (0.17)
Diluted (in dollars per share)	$ (0.24)	$ (0.15)	$ (0.54)	$ (0.71)
Weighted average common shares outstanding
Basic (in shares)	286.7	234.4	285.8	231.2
Diluted (in shares)	286.7	264.5	285.8	253.3