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Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2019	Sep. 19, 2019	Jun. 12, 2019	Dec. 31, 2018	May 31, 2018	Nov. 30, 2017	Mar. 31, 2017	Jun. 08, 2015
Debt Instrument [Line Items]
Long-term debt	$ 3,749.2			$ 2,939.0
Less: Debt discount	(102.7)			(139.4)
Less: Debt issuance costs	(34.0)	$ (17.5)	$ (6.6)	(33.5)	$ (1.1)	$ (3.3)	$ (2.4)
Net long-term debt, including current maturities	3,612.5			2,766.1
Less: Current maturities	(736.0)			(138.5)
Net long-term debt	2,876.5			2,627.6
Senior Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt	$ 800.0			$ 400.0
Debt instrument, interest rate	3.30%			3.77%
Term Loan B Facility
Debt Instrument [Line Items]
Long-term debt	$ 1,630.9			$ 1,134.5
Less: Debt discount	(10.5)			(9.3)
Less: Debt issuance costs	$ (24.3)			$ (19.2)
Debt instrument, interest rate	3.80%			4.27%
Other long-term debt
Debt Instrument [Line Items]
Long-term debt	$ 53.3			$ 139.5
1.00% Notes
Debt Instrument [Line Items]
Debt instrument, interest rate	1.00%
1.00% Notes | Convertible Debt
Debt Instrument [Line Items]
Long-term debt	$ 690.0			690.0
Less: Debt discount	(20.4)			(41.6)
Less: Debt issuance costs	$ (2.8)			$ (5.8)
Debt instrument, interest rate	1.00%			1.00%				1.00%
1.625% Notes
Debt Instrument [Line Items]
Debt instrument, interest rate	1.625%
1.625% Notes | Convertible Debt
Debt Instrument [Line Items]
Long-term debt	$ 575.0			$ 575.0
Less: Debt discount	(71.8)			(88.5)
Less: Debt issuance costs	$ (6.9)			$ (8.5)			$ (13.7)
Debt instrument, interest rate	1.625%			1.625%			1.625%
Minimum | Other long-term debt
Debt Instrument [Line Items]
Debt instrument, interest rate	1.00%
Maximum | Other long-term debt
Debt Instrument [Line Items]
Debt instrument, interest rate	4.00%

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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