Other Operating Expense (Income) - Additional Information (Details) $ in Millions	12 Months Ended
Dec. 31, 2018 USD ($)
Other Operating Expense (Income) [Line Items]
Restructuring expenses for employee related costs	$ 7.7
Other Operating Expense (Income)
Other Operating Expense (Income) [Line Items]
Restructuring expenses for employee related costs	7.7
Environmental insurance recovery write-down	$ 7.3

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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