Debt and Financing - Schedule of Outstanding Debt (Details) - USD ($) $ in Millions		Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Par Value		$ 1,602.7
Discount		(10.3)
Commitment Fee		(22.0)
Debt Issuance Costs		(10.4)
Book Value		1,560.0
Book Value, Current Maturities		(71.4)	$ (72.3)
Par Value, Excluding Current Maturities		1,531.3
Premium (Discount), Excluding Current Maturities		(10.3)
Commitment Fee, Excluding Current Maturities		(22.0)
Debt Issuance Costs, Noncurrent		(10.4)
Book Value, Excluding Current Maturities		1,488.6	$ 1,482.2
Term Loan
Debt Instrument [Line Items]
Par Value	[1]	600.7
Discount	[1]	(10.3)
Commitment Fee	[1]	0.0
Debt Issuance Costs	[1]	(4.6)
Book Value	[1]	$ 585.8
Effective Interest Rate	[1]	9.50%
ABL Facility | 2014 ABL Facility Credit Agreement
Debt Instrument [Line Items]
Par Value		$ 0.0
Discount		0.0
Commitment Fee		0.0
Debt Issuance Costs		0.0
Book Value		0.0
Tranche A | UST Loan
Debt Instrument [Line Items]
Par Value	[1]	321.1
Discount	[1]	0.0
Commitment Fee	[1]	(9.5)
Debt Issuance Costs	[1]	(2.4)
Book Value	[1]	$ 309.2
Effective Interest Rate	[1]	6.40%
Tranche B | UST Loan
Debt Instrument [Line Items]
Par Value		$ 400.0
Discount		0.0
Commitment Fee		(12.5)
Debt Issuance Costs		(3.3)
Book Value		$ 384.2
Effective Interest Rate		6.50%
Secured Second A&R CDA
Debt Instrument [Line Items]
Par Value		$ 23.5
Discount		0.0
Commitment Fee		0.0
Debt Issuance Costs		0.0
Book Value		$ 23.5
Effective Interest Rate		8.50%
Unsecured Second A&R CDA
Debt Instrument [Line Items]
Par Value		$ 42.5
Discount		0.0
Commitment Fee		0.0
Debt Issuance Costs		0.0
Book Value		$ 42.5
Effective Interest Rate		8.50%
Lease financing obligations
Debt Instrument [Line Items]
Par Value		$ 214.9
Discount		0.0
Commitment Fee		0.0
Debt Issuance Costs		(0.1)
Book Value		$ 214.8
Effective Interest Rate		17.60%
Par Value, Current Maturities		$ (5.4)
Discount, Current Maturities		0.0
Commitment Fee, Current Maturities		0.0
Deferred Issuance Costs, Current		0.0
Book Value, Current Maturities		(5.4)
Secured and Unsecured Second A&R CDA [Member]
Debt Instrument [Line Items]
Par Value, Current Maturities		(66.0)
Discount, Current Maturities		0.0
Commitment Fee, Current Maturities		0.0
Deferred Issuance Costs, Current		0.0
Book Value, Current Maturities		$ (66.0)

[1] The Par Value and the Book Value both reflect the accumulated cash funds that have been drawn, plus the accumulated paid-in-kind interest.