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Disposition of Non-Core Assets (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Assets held for sale $ 2.1   $ 2.1 $ 4.1
Inventory valuation reserves 14.1   14.1 $ 10.7
Disposal Group, Held-for-sale, Not Discontinued Operation        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Accelerated depreciation   $ 1.6    
Gain (loss) on sale/disposal 1.0   4.2  
Inventory valuation reserves 3.1   3.1  
Disposal Group, Held-for-sale, Not Discontinued Operation | Machinery and Equipment        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Assets held for sale $ 2.1   $ 2.1