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Debt - Schedule of Debt Summarized (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Sep. 25, 2018
Debt Instrument [Line Items]
Finance lease obligations	$ 3.5	$ 3.2
Other	0.0	0.0
Debt issuance costs	(4.6)	(5.9)
Total debt	593.3	542.7
Less: Current debt	(2.8)	(1.9)
Long-term debt	590.5	540.8
Deferred Profit Sharing
Debt Instrument [Line Items]
Long-term debt, gross	5.0	4.8
Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross	50.0	0.0
Term loan facility | Term Loan
Debt Instrument [Line Items]
Long-term debt, gross	$ 195.5	197.5
6.875% senior unsecured notes due October 1, 2026, net of discount of $6.1 million and $6.9 million as of December 31, 2020 and 2019, respectively | Unsecured Debt
Debt Instrument [Line Items]
Interest rate (percent)	6.875%		6.875%
Unamortized discount	$ 6.1	6.9
Long-term debt, gross	$ 343.9	$ 343.1

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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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Amount, after accumulated amortization, of debt discount.

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