Commitments and Contingencies Commitments and Contingencies - Environmental Textuals (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Environmental-related assets	$ 18.6
Qualified Settlement Fund [Member]
Deferred Income		$ 7.2
Amortization of Deferred Gain	7.2
Qualified Settlement Fund [Member] \| Discontinued Operations [Member]
Amortization of Deferred Gain	$ 1.3

Recorded amount of the individual components comprising the asset for third-party recoveries related to environmental remediation obligations.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=109237650&loc=d3e13022-110858

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