Segment Information - Reconciliation of Adjusted EBITDA to Net Loss (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting [Abstract]
Net loss from continuing operations	$ 36,200,000	$ (405,900,000)	$ 11,800,000	$ 38,000,000.0	$ (145,700,000)	$ (66,300,000)	$ (60,000,000.0)	$ (23,600,000)	$ (324,400,000)	$ (296,200,000)	$ (40,800,000)
Add (subtract):
Gain on amendment of Series B Convertible Preferred Stock									0	0	(32,900,000)
Net income (loss) attributable to the non-controlling interests									4,500,000	600,000	(3,000,000.0)
Loss (income) from discontinued operations, net of tax	$ (50,400,000)	$ 401,600,000	$ (61,400,000)	$ (46,900,000)	$ 126,900,000	$ 29,400,000	$ (13,900,000)	$ (38,600,000)	242,900,000	103,800,000	(113,800,000)
Income tax expense (benefit)									23,800,000	(68,600,000)	(41,300,000)
Interest expense, net									311,000,000.0	336,900,000	372,300,000
Depreciation expense									44,600,000	46,400,000	46,600,000
Amortization expense									112,100,000	109,600,000	109,100,000
Income (loss) before income taxes and non-controlling interests									414,500,000	232,500,000	296,200,000
Adjustments to reconcile to Adjusted EBITDA:
Restructuring expense									6,300,000	23,500,000	25,000,000.0
Amortization of inventory step-up									0	0	11,700,000
Acquisition and integration costs									12,100,000	4,100,000	25,100,000
Legal settlement									0	(10,800,000)	0
Foreign exchange loss on foreign denominated external and internal long-term debt									6,000,000.0	53,400,000	25,800,000
Debt refinancing costs									500,000	83,100,000	19,700,000
Goodwill impairment									0	0	46,600,000
Gain on settlement agreement related to Series B Convertible Preferred Stock									0	0	(103,000,000.0)
Non-cash change in fair value of preferred stock redemption liability									0	0	5,000,000.0
Pension plan settlement									0	10,500,000	1,700,000
Gain on sale of equity investment									(11,300,000)	0	0
Change in fair value of contingent consideration									(21,800,000)	3,400,000	5,100,000
Other, net									14,400,000	1,500,000	9,500,000
Adjusted EBITDA									$ 420,700,000	$ 401,200,000	$ 368,400,000