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Commitments and Contingencies (Details)
$ in Millions
9 Months Ended
Sep. 30, 2018
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
Commitments $ 776.5
Environmental matters [Member]  
Site Contingency [Line Items]  
Accrued environmental remediation liabilities $ 79.6
Minimum [Member] | Environmental matters [Member]  
Site Contingency [Line Items]  
Complete remediation time frame one
Maximum [Member] | Environmental matters [Member]  
Site Contingency [Line Items]  
Complete remediation time frame five