Segment Information - Reconciliation of Adjusted EBITDA to Net Loss (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting [Abstract]
Net loss attributable to common stockholders	$ (141,500,000)	$ (69,200,000)	$ (61,100,000)	$ (24,400,000)	$ (1,900,000)	$ 104,700,000	$ (8,800,000)	$ (134,800,000)	$ (296,200,000)	$ (40,800,000)	$ (308,600,000)
Add (subtract):
Gain on amendment of Series B Convertible Preferred Stock									0	(32,900,000)	0
Net income (loss) attributable to the non-controlling interests									600,000	(3,000,000)	4,200,000
Income tax expense									6,600,000	28,600,000	75,100,000
Interest expense, net									341,600,000	375,700,000	213,900,000
Depreciation expense									78,300,000	75,000,000	48,900,000
Amortization expense									275,900,000	267,300,000	202,100,000
Income (loss) before income taxes and non-controlling interests									406,800,000	669,900,000	235,600,000
Adjustments to reconcile to Adjusted EBITDA:
Restructuring expense									30,800,000	31,100,000	25,300,000
Amortization of inventory step-up									0	11,700,000	76,500,000
Acquisition and integration costs									4,800,000	33,400,000	122,400,000
Non-cash change in fair value of contingent consideration									3,400,000	5,100,000	6,800,000
Legal settlements									(10,800,000)	(2,800,000)	(16,000,000)
Foreign exchange loss on foreign denominated external and internal long-term debt									102,500,000	33,900,000	46,400,000
Debt refinancing costs									83,200,000	19,700,000	0
Fair value loss on foreign exchange forward contract									0	0	73,700,000
Goodwill impairment									160,000,000	46,600,000	0
Gain on settlement agreement related to Series B Convertible Preferred Stock									0	(103,000,000)	0
Non-cash change in fair value of preferred stock redemption liability									0	5,000,000	0
Costs related to Proposed Separation									12,100,000	0	0
Pension plan settlement and curtailment									10,500,000	1,800,000	0
Other, net									17,600,000	17,100,000	(3,000,000)
Adjusted EBITDA									$ 820,900,000	$ 769,500,000	$ 567,700,000