Environmental and Regulatory (Details) $ in Millions	Sep. 30, 2019 USD ($)
Environmental Remediation Obligations [Abstract]
Accrued environmental costs	$ 8.2
Accrued environmental costs expected to be spent within the next year	$ 2.0

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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