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Segment and Geographic Information - Reconciliation of Operating Profit Loss from Segments to Consolidated (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment adjusted EBITDA	$ 719.8	$ 970.3	$ 1,183.9
Interest expense	(212.3)	(217.3)	(216.3)
Depreciation and amortization	(521.9)	(536.9)	(528.8)
Impairment charges	(510.0)	(665.0)	(485.5)
Restructuring and acquisition-related costs	(67.2)	(57.8)	(78.9)
Pension settlements	(0.5)	(9.8)	0.0
Gain (loss) on sale of business	(1.0)	(21.3)	15.5
Gain on bargain purchase of business	0.0	10.8	0.0
Gain on settlement of capital lease	0.0	0.0	15.6
Debt refinancing and redemption costs	(7.9)	(8.4)	(19.4)
Malvern Fire charges, net of recoveries	(9.3)	0.0	0.0
Other	0.0	2.4	0.0
Loss before income taxes	$ (610.3)	$ (533.0)	$ (113.9)

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