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Commitments and Contingencies (Tables)
 6 Months Ended
Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]  
Summary of Balance Sheet Classification of Environmental Liabilities These balances are broken down on the condensed consolidated balance sheets as follows:
Balance sheet locationJune 30, 2020December 31, 2019
Current portion of environmental remediation obligationsOther current liabilities$0.4  $0.6  
Long-term portion of environmental remediation obligationsOther liabilities3.2  3.1  
   Total $3.6  $3.7  
Schedule Of Indemnification Asset For Environmental Loss Contingencies These balances are broken down on the condensed consolidated balance sheets as follows:
Balance sheet locationJune 30, 2020December 31, 2019
Current portion of indemnification assetsOther current assets$0.4  $0.6  
Non-current portion of indemnification assetsOther assets3.2  3.1  
   Total $3.6  $3.7