CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Net sales	$ 3,775,900,000	$ 3,585,900,000	$ 2,542,300,000
Cost of sales	2,186,900,000	2,078,200,000	1,550,400,000
Gross profit	1,589,000,000	1,507,700,000	991,900,000
Operating expenses:
Selling, technical, general and administrative	1,109,300,000	1,123,300,000	857,500,000
Research and development	98,400,000	84,400,000	62,800,000
Goodwill impairment	160,000,000	46,600,000	0
Total operating expenses	1,367,700,000	1,254,300,000	920,300,000
Operating profit	221,300,000	253,400,000	71,600,000
Other (expense) income:
Interest expense, net	(341,600,000)	(375,700,000)	(213,900,000)
Foreign exchange loss	(107,500,000)	(14,100,000)	(43,400,000)
Other (expense) income, net	(61,200,000)	88,300,000	(43,600,000)
Total other expense	(510,300,000)	(301,500,000)	(300,900,000)
Loss before income taxes and non-controlling interests	(289,000,000)	(48,100,000)	(229,300,000)
Income tax expense	(6,600,000)	(28,600,000)	(75,100,000)
Net loss	(295,600,000)	(76,700,000)	(304,400,000)
Net (income) loss attributable to the non-controlling interests	(600,000)	3,000,000	(4,200,000)
Net loss attributable to stockholders	(296,200,000)	(73,700,000)	(308,600,000)
Gain on amendment of Series B Convertible Preferred Stock	0	32,900,000	0
Net loss attributable to common stockholders	$ (296,200,000)	$ (40,800,000)	$ (308,600,000)
Loss per share
Basic (in dollars per share)	$ (1.04)	$ (0.17)	$ (1.52)
Diluted (in dollars per share)	$ (1.04)	$ (0.65)	$ (1.52)
Weighted average common shares outstanding
Basic (in shares)	286.1	243.3	203.2
Diluted (in Shares)	286.1	272.3	203.2