Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Goodwill and Other Intangible Assets - Goodwill Narrative (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Domestic Coke \| Operating Segments
Goodwill [Line Items]
Goodwill		$ 3.4	$ 3.4
Logistics
Goodwill [Line Items]
Impairment charge	$ 73.5
Logistics \| Discount Rate
Goodwill [Line Items]
Discount rate	0.12