Long-Term Debt - Summary of Long-Term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2020	Jul. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtAndCapitalLeaseObligations		us-gaap:LongTermDebtAndCapitalLeaseObligations
Finance lease obligations	$ 242.7		$ 253.4
Less: unamortized debt issuance costs, discount and premium, net	(16.8)		(10.8)
Total debt	2,822.4		2,580.7
Less: Current maturities	61.1		56.0
Total long-term debt	2,761.3		2,524.7
Secured Debt \| Senior secured term loan
Debt Instrument [Line Items]
Long-term debt	1,543.1		1,434.1
Unamortized fair value discount (premium)	(3.9)		4.6
Secured Debt \| Senior secured revolving credit facility
Debt Instrument [Line Items]
Long-term debt	0.0		0.0
Senior Notes \| 6.750% senior unsecured notes due 2025
Debt Instrument [Line Items]
Long-term debt	$ 370.0		370.0
Stated interest rate	6.75%
Senior Notes \| 10.000% senior unsecured notes due 2027
Debt Instrument [Line Items]
Long-term debt	$ 545.0		430.0
Less: unamortized debt issuance costs, discount and premium, net		$ (1.0)
Stated interest rate	10.00%	10.00%
Notes payable and other secured loans
Debt Instrument [Line Items]
Long-term debt	$ 138.4		$ 104.0

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

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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