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Other Long-Term Liabilities (Details)
$ in Millions
Jun. 30, 2018
USD ($)
ManufacturingSite
Jun. 30, 2017
USD ($)
Environmental Remediation Obligations [Abstract]    
Amount by which unaccrued maximum of estimated range exceeds minimum $ 101.5  
Accruals for extended environmental-related activities 215.1 $ 160.2
Estimated costs of current investigation and remediation activities included in other accruals $ 27.0 $ 30.4
Number of manufacturing sites accounting for the majority of the accrual for environmental-related activities | ManufacturingSite 4  
Accruals for environmental-related activities of sites $ 189.5  
Percentage of accrual for environmental-related activities related to sites 78.30%  
Amount of unaccrued maximum related to sites $ 85.1  
Percentage of aggregate unaccrued maximum related to sites 83.80%