Accrued Expenses - Summary of Accrued Expenses (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Accrued compensation and benefits	$ 36.4	$ 36.3
Accrued waste disposal costs	43.7	41.9
Accrued insurance and self-insurance reserves	14.9	13.2
Accrued severance	0.1	0.4
Derivative valuation	2.4	0.0
Other accrued expenses	27.0	25.9
Accrued expenses net	$ 124.5	$ 117.7

Accrued Derivative Valuation, Current

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- Definition

Accrued Severance Cost Current

+ References

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- Definition

Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities to mitigate potential loss from various risks or to satisfy a promise to provide certain coverage's to employees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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Carrying amount as of the balance sheet date of the liability for remediation, site restoration, postclosure, monitoring commitments, or other exit costs associated with the sale, disposal or abandonment of a particular property resulting from unanticipated contamination of the assets.

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Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

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