Segment Information - Reconciliation of Adjusted EBITDA to Net Loss (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Net (loss) income attributable to common stockholders	$ (69.2)		$ 104.7	$ (154.7)	$ (39.0)
Gain on amendment of Series B Convertible Preferred Stock	0.0		(32.9)	0.0	(32.9)
Net income (loss) attributable to the non-controlling interests	2.9		(5.9)	4.8	(4.7)
Income tax expense	37.5		20.4	67.3	65.7
Interest expense, net	85.6		98.5	260.0	289.7
Depreciation expense	21.3		18.9	58.4	55.8
Amortization expense	71.2		68.0	207.0	199.1
EBITDA	149.3		271.7	442.8	533.7
Adjustments to reconcile to adjusted EBITDA:
Restructuring expense	9.4		7.3	21.0	19.5
Amortization of inventory step-up	0.0		0.0	0.0	11.7
Acquisition and integration costs	0.5		3.2	4.5	27.4
Non-cash change in fair value of contingent consideration	1.0		0.2	3.2	4.3
Legal settlements	0.0		0.0	(10.6)	(2.8)
Foreign exchange loss on foreign denominated external and internal long-term debt	26.4		12.0	95.4	58.7
Debt refinancing costs	0.8		0.0	14.7	0.0
Gain on settlement agreement related to Series B Convertible Preferred Stock	0.0		(103.0)	0.0	(103.0)
Non-cash change in fair value of preferred stock redemption liability	0.0		(6.0)	0.0	(6.0)
Costs related to Proposed Separation	5.5		0.0	9.2	0.0
Other, net	3.7		4.7	14.7	7.9
Adjusted EBITDA	$ 196.6		$ 190.1	$ 594.9	$ 551.4
Settled Litigation
Adjustments to reconcile to adjusted EBITDA:
Legal settlements		$ (10.6)