Debt and Financing - Schedule of Maturities of Long-term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
2021	$ 3.9
2022	70.7
2023	4.9
2024	992.5
2025	0.2
Thereafter	211.8
Total	1,284.0	$ 902.8
Term Loan
Debt Instrument [Line Items]
2021	0.0
2022	0.0
2023	0.0
2024	613.0
2025	0.0
Thereafter	0.0
Total	613.0	600.0
ABL Facility \| 2014 ABL Facility Credit Agreement
Debt Instrument [Line Items]
2021	0.0
2022	0.0
2023	0.0
2024	0.0
2025	0.0
Thereafter	0.0
Total	0.0	0.0
Tranche A \| UST Loan
Debt Instrument [Line Items]
2021	0.0
2022	0.0
2023	0.0
2024	302.3
2025	0.0
Thereafter	0.0
Total	302.3
Tranche B \| UST Loan
Debt Instrument [Line Items]
2021	0.0
2022	0.0
2023	0.0
2024	74.8
2025	0.0
Thereafter	0.0
Total	74.8
Second A&R CDA
Debt Instrument [Line Items]
2021	1.4
2022	66.6
2023	0.0
2024	0.0
2025	0.0
Thereafter	0.0
Total	68.0
Lease Financing Obligation
Debt Instrument [Line Items]
2021	2.5
2022	4.1
2023	4.9
2024	2.4
2025	0.2
Thereafter	211.8
Total	$ 225.9	$ 231.6

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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