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Commitments and Contingencies - RCRA Compliance Matters (Details) - WRC - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Loss Contingencies [Line Items] |  |  |
Expected remaining costs under consent order | $ 4.2 |  |
Expenses related to environmental, health and safety (EHS) matters | $ 15.6 | $ 17.2 | $ 35.7

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- Definition Represents the expected remaining costs under the Wynnewood Consent Order. + References No definition available. + Details
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- Definition Amount of environmental remediation costs capitalized. These expenditures may relate to long-lived improvements in operating facilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 25 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=39739230&loc=d3e11660-110855 + Details
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