Debt - Schedule of Maturities of Long-term Debt, Including Finance Leases (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Total
2021	$ 102.8
2022	18.2
2023	16.5
2024	9.8
2025	2.8
Thereafter	479.8
Total	629.9	$ 579.4
Long-Term Debt
2021	100.4
2022	16.2
2023	15.8
2024	9.4
2025	2.8
Thereafter	479.8
Long-term debt	624.4
Finance Leases
2021	2.4
2022	2.0
2023	0.7
2024	0.4
2025	0.0
Thereafter	0.0
Total finance lease liabilities	$ 5.5	$ 5.3

Finance Lease, Liability, Payments, Due After Year Five, Discounted Obligation

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Finance Lease, Liability, Payments, Due Next Twelve Months, Discounted Obligation

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Finance Lease, Liability, Payments, Due Year Five, Discounted Obligation

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Finance Lease, Liability, Payments, Due Year Three, Discounted Obligation

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Finance Lease, Liability, Payments, Due Year Two, Discounted Obligation

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Long-term Debt and Lease Obligations, Maturities, Repayments of Principal After Year Five

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Long-term Debt and Lease Obligations, Maturities, Repayments of Principal in Year Five

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Long-term Debt and Lease Obligations, Maturities, Repayments of Principal in Year Four

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Long-term Debt and Lease Obligations, Maturities, Repayments of Principal in Year Three

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Long-term Debt and Lease Obligations, Maturities, Repayments of Principal in Year Two

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Long-term Debt and Lease Obligations, Repayments of Principal in Next Twelve Months

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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, including portion classified as current.

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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