Environmental Matters (Details) - USD ($) $ in Millions	Dec. 31, 2020	Jun. 30, 2020
Environmental Remediation Obligations [Abstract]
Reserves for Environmental Costs	$ 15.0	$ 15.6
Accrued Environmental Loss Contingencies, Current	$ 2.6	$ 6.1

Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer.

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