Debt and Financing - Schedule of Outstanding Debt (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Par Value	$ 909.8
Discount	(23.9)
Debt Issuance Costs	(11.2)
Book Value	874.7
Book Value, Current Maturities	(3.6)	$ (4.1)
Par Value, Excluding Current Maturities	906.2
Premium (Discount), Excluding Current Maturities	(23.9)
Debt Issuance Costs, Noncurrent	(11.2)
Book Value, Excluding Current Maturities	871.1	$ 858.1
New Term Loan
Debt Instrument [Line Items]
Par Value	613.5
Discount	(23.9)
Debt Issuance Costs	(10.7)
Book Value	$ 578.9
Effective Interest Rate	15.10%
ABL Facility \| 2014 ABL Facility Credit Agreement
Debt Instrument [Line Items]
Par Value	$ 0.0
Discount	0.0
Debt Issuance Costs	0.0
Book Value	0.0
Secured Second A&R CDA
Debt Instrument [Line Items]
Par Value	24.8
Discount	0.0
Debt Issuance Costs	(0.1)
Book Value	$ 24.7
Effective Interest Rate	7.80%
Unsecured Second A&R CDA
Debt Instrument [Line Items]
Par Value	$ 45.2
Discount	0.0
Debt Issuance Costs	(0.1)
Book Value	$ 45.1
Effective Interest Rate	7.80%
Par Value, Current Maturities	$ (1.4)
Discount, Current Maturities	0.0
Deferred Issuance Costs, Current	0.0
Book Value, Current Maturities	(1.4)
Lease financing obligations
Debt Instrument [Line Items]
Par Value	226.3
Discount	0.0
Debt Issuance Costs	(0.3)
Book Value	$ 226.0
Effective Interest Rate	16.60%
Par Value, Current Maturities	$ (2.2)
Discount, Current Maturities	0.0
Deferred Issuance Costs, Current	0.0
Book Value, Current Maturities	$ (2.2)

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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