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Debt, Interest Income, Expense and Other Finance Costs - Summary of Debt (Details) € in Millions, $ in Millions	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)	Jul. 31, 2019 USD ($)
Debt Instrument [Line Items]
Finance leases	$ 18.2	$ 18.7
Total debt	524.7	628.8
Less: Current maturities of long-term debt and finance leases	22.9	54.1
Long-term debt	501.8	574.7
Other
Debt Instrument [Line Items]
Long-term debt	3.3	39.5
Term Loans | Term Loans
Debt Instrument [Line Items]
Long-term debt	503.2	515.6		$ 525.0
Secured Borrowing
Debt Instrument [Line Items]
Long-term debt		37.3	€ 33.6
Credit Facility | Credit Facility
Debt Instrument [Line Items]
Long-term debt	$ 0.0	$ 55.0

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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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Amount of long-term debt and lease obligation, classified as noncurrent.

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