Legal and Environmental Matters Legal and Environmental Matters (Details) $ in Millions	Sep. 30, 2019 USD ($)
Environmental Remediation Obligations [Abstract]
Recorded in Other assets	$ 1.0

Present value of the asset for third-party recoveries related to environmental remediation obligations as of the balance sheet date (if the receivable is discounted).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859

Name:	us-gaap_RecordedThirdPartyEnvironmentalRecoveriesNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant