Discontinued Operations and Assets Held for Sale (Details) $ in Millions			1 Months Ended		3 Months Ended			9 Months Ended			12 Months Ended
	Jul. 17, 2018 USD ($)	May 21, 2018 USD ($)	Aug. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)		Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)		Dec. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Mar. 16, 2018 USD ($)	Feb. 12, 2018 USD ($) asphalt_terminal
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Sale of Equity Method Investments		$ 110.8
Impairment loss on assets held for sale					$ 0.0	$ 0.0	[1]	$ 0.0	$ 27.5	[1],[2],[3]
(Gain) loss on sale of business					0.0	0.0	[1]	0.0	(13.2)	[1],[2],[3]
Proceeds from sale of business								0.0	110.8	[3]
Cash provided by investing activities - discontinued operations								0.0	20.0	[3]
Income from non-controlling interest					0.0	0.0		0.0	8.1
Reduction in contingent loss accrual					0.0			5.7
Four Asphalt Terminals [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Asphalt Terminals | asphalt_terminal														4
Consideration of business disposition														$ 75.0
California Discontinued Entities - AltAir
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration of business disposition													$ 85.2
(Gain) loss on sale of business									41.2		$ 41.4
Proceeds from sale of business								70.4
Remaining proceeds from sale of business to be received								14.8
Cash provided by investing activities - discontinued operations				$ 14.9
California Discontinued Entities - Long Beach
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Gain) loss on sale of business						1.4
Proceeds from sale of business	$ 14.5
California Discontinued Entities
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Liabilities from disposal group					3.4			3.4				$ 5.0
Additional accrual for emission credit obligation					$ 0.0			3.4
California Discontinued Entities | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Gain) loss on sale of business						$ (1.4)			39.8
Income from non-controlling interest									$ (8.1)
Ten-Tex Litigation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reduction in contingent loss accrual								$ 2.4
World Energy Note Receivable
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Promissory note			$ 12.3
Stated interest rate (as percent)			6.00%
Principal installments			$ 0.5

[1] Net revenues and cost of materials and other for the three and nine months ended September 30, 2018 reflect a correction of an intercompany elimination which resulted in an increase in those accounts of $273.7 million and $347.1 million, respectively, not previously reflected on the unaudited consolidated financial statements in our September 30, 2018 Quarterly Report on Form 10-Q filed on November 9, 2018. Such amounts are not considered material to the financial statements and had no impact to operating income or net income for those periods. See Note 23 to our annual audited consolidated financial statements included in Part II, Item 8 of our 2018 Annual Report on Form 10-K, as amended and filed on June 27, 2019, for further discussion.

[2] Income tax expense for the nine months ended September 30, 2018 reflects a correction made in our 2018 Annual Report on Form 10-K (as originally filed on March 1, 2019) to record additional deferred tax expense totaling $5.5 million related to the recognition of a valuation allowance on deferred tax assets recognized in connection with the Big Spring Logistic Assets Acquisition (see Note 5) not previously reported in our September 30, 2018 Quarterly Report on Form 10-Q filed on November 09, 2018. Such amount is not considered material to the financial statements or the trend of earnings for that period. See Note 23 to our annual audited consolidated financial statements included in Part II, Item 8 of our 2018 Annual Report on Form 10-K, as amended and filed on June 27, 2019, for further discussion.

[3] Net income and deferred income taxes for the nine months ended September 30, 2018 reflects a correction made in our 2018 Annual Report on Form 10-K (as originally filed on March 1, 2019) to record additional deferred tax expense totaling $5.5 million related to the recognition of a valuation allowance on deferred tax assets recognized in connection with the Big Spring Logistic Assets Acquisition (see Note 5) not previously reported in our September 30, 2018 Quarterly Report on Form 10-Q filed on November 09, 2018. Such amount is not considered material to the financial statements or the trend of earnings for that period. See Note 23 to our annual audited consolidated financial statements included in Part II, Item 8 of our 2018 Annual Report on Form 10-K, as amended and filed on June 27, 2019, for further discussion.