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Debt, Interest Income, Expense and Other Finance Costs - Schedule of Debt (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Finance Leases	$ 17.7	$ 18.7
Total debt	526.6	628.8
Current maturities of long-term debt	19.6	54.1
Long-term debt	506.9	574.7
Other
Debt Instrument [Line Items]
Long-term debt	2.6	39.5
Term Loans | Term Loans
Debt Instrument [Line Items]
Long-term debt	506.4	515.6
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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