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Contingencies and Commitments (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]    
Increase of liabilities of environmental remediation costs of a company-owned former operating site $ 0.1  
Environmental remediation liability $ 16.1 $ 16.0