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Reconciliation of Total Segment Adjusted EBITDA to Income Before Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Total segment adjusted EBITDA	$ 183.2	$ 297.1	$ 668.7	$ 458.3
Interest expense	(49.7)	(53.9)	(150.7)	(160.0)
Depreciation and amortization	(135.6)	(125.0)	(421.2)	(393.7)
Restructuring and acquisition-related costs	(7.4)	(9.7)	(40.8)	(38.6)
Loss on sale of business	0.0	0.0	(2.7)	(1.0)
Unrealized gain on equity securities	19.4	0.0	19.4	0.0
Debt refinancing and redemption costs	(31.6)	(5.2)	(34.0)	(6.7)
Impairment charges	0.0	0.0	0.0	(510.0)
Malvern Fire charges, net of recoveries	5.7	(8.6)	11.1	(8.6)
Income (loss) before income taxes	$ (16.0)	$ 94.7	$ 49.8	$ (660.3)

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