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Long-term Debt - Debt Summary (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	May 31, 2020	Jan. 19, 2017
Debt Instrument [Line Items]
Interest rate	5.625%
Principal	$ 2,488.8	$ 2,431.6
Less: Current maturities of long-term debt	(85.8)	(81.4)
Less: Debt discount	(83.1)	(86.2)
Less: Debt issuance costs	(30.4)	(32.8)
Long-term debt, net of current maturities, debt discount and debt issuance costs	2,289.5	2,231.2
Senior Secured Credit Facilities \| Revolving Credit Facility due 2023
Debt Instrument [Line Items]
Principal	0.0	0.0
Senior Secured Credit Facilities \| Term Loan A Facility due 2023
Debt Instrument [Line Items]
Principal	623.6	636.9
Senior Secured Credit Facilities \| Term Loan B-1 Facility due 2025
Debt Instrument [Line Items]
Principal	$ 988.4	$ 991.2
Senior Notes \| 5.625% Notes due 2027
Debt Instrument [Line Items]
Interest rate	5.625%	5.625%		5.625%
Principal	$ 400.0	$ 400.0
Convertible Notes \| 2.75% Convertible Notes due 2026
Debt Instrument [Line Items]
Interest rate	2.75%		2.75%
Principal	$ 330.5	330.5
Other long-term obligations
Debt Instrument [Line Items]
Principal	$ 146.3	$ 73.0