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Property, Plant and Equipment - Narrative (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
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Other Current Assets |  |
Property, Plant and Equipment |  |
Net book value of assets held for sale | $ 8.7 | $ 12.9

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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