Segments and Related Information (Reportable Segment) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017
Reportable segment information
Sales	$ 774.8	$ 929.6	$ 896.9	$ 851.3	$ 848.0	$ 953.5	$ 945.5	$ 750.5	$ 3,452.6		$ 3,497.5	$ 3,763.8
Income (loss) from unconsolidated affiliates									3.8		(3.7)	0.0
Adjusted EBITDA									304.6		263.9	314.3
Reconciling items to net loss:
Depreciation and amortization									129.4		130.9	179.1
Loss on impairment and disposal of assets									37.0		0.0	207.3
Gain (Loss) on sale of business, net									8.7		(4.8)	(236.0)
Interest expense									134.6		155.5	183.1
Debt extinguishment costs									2.2		58.8	0.0
Unrealized (gain) loss on derivatives									26.1		(30.2)	(3.6)
Gain on sale of unconsolidated affiliates									(1.2)		(0.2)	0.0
Non-recurring charges									3.5
Non-cash equity-based compensation and other non-cash items									7.4		4.0	15.8
Income tax expense (benefit)									0.5		0.7	(0.1)
Net loss from continuing operations									(43.6)		(51.0)	(31.3)
Sales Revenue, Segment
Reportable segment information
Sales									3,452.6		3,497.5	3,763.8
Intersubsegment Eliminations
Reportable segment information
Sales									0.0		0.0	0.0
Intersegment Eliminations
Reportable segment information
Sales									(140.9)		(179.4)	(141.1)
Income (loss) from unconsolidated affiliates									0.0		0.0	0.0
Adjusted EBITDA									0.0		0.0	0.0
Reconciling items to net loss:
Depreciation and amortization									0.0		0.0	0.0
Loss on impairment and disposal of assets									0.0			0.0
Gain (Loss) on sale of business, net									0.0		0.0	0.0
Interest expense									0.0		0.0	0.0
Debt extinguishment costs									0.0		0.0
Unrealized (gain) loss on derivatives									0.0		0.0	0.0
Gain on sale of unconsolidated affiliates									0.0
Intersegment Eliminations | Sales Revenue, Segment
Reportable segment information
Sales									0.0		0.0	0.0
Intersegment Eliminations | Intersubsegment Eliminations
Reportable segment information
Sales									(140.9)		(179.4)	(141.1)
Specialty Product | Operating Segments
Reportable segment information
Sales									1,447.3		1,480.5	1,378.5
Income (loss) from unconsolidated affiliates									3.8		(3.7)	0.0
Adjusted EBITDA									220.2		162.2	188.3
Reconciling items to net loss:
Depreciation and amortization									47.1		50.1	69.1
Loss on impairment and disposal of assets									0.0			60.3
Gain (Loss) on sale of business, net									0.0		0.0	0.0
Interest expense									0.0		(0.2)	1.7
Debt extinguishment costs									0.0		0.0
Unrealized (gain) loss on derivatives									1.0		(1.0)	(1.0)
Gain on sale of unconsolidated affiliates									(1.2)
Specialty Product | Operating Segments | Sales Revenue, Segment
Reportable segment information
Sales									1,354.1		1,382.4	1,300.4
Specialty Product | Operating Segments | Intersubsegment Eliminations
Reportable segment information
Sales									93.2		98.1	78.1
Fuel Product
Reconciling items to net loss:
Unusual or Infrequent Item, or Both, Insurance Proceeds									6.5
Fuel Product | Operating Segments
Reportable segment information
Sales									2,146.2		2,196.4	2,526.4
Income (loss) from unconsolidated affiliates									0.0		0.0	0.0
Adjusted EBITDA									182.0	[1]	199.2	225.8
Reconciling items to net loss:
Depreciation and amortization									74.7		72.2	106.4
Loss on impairment and disposal of assets									11.6			147.0
Gain (Loss) on sale of business, net									8.7		4.8	(236.0)
Interest expense									(16.3)		(23.1)	(12.8)
Debt extinguishment costs									0.0		0.0
Unrealized (gain) loss on derivatives									25.1		(29.2)	(2.6)
Gain on sale of unconsolidated affiliates									0.0
Fuel Product | Operating Segments | Sales Revenue, Segment
Reportable segment information
Sales									2,098.5		2,115.1	2,463.4
Fuel Product | Operating Segments | Intersubsegment Eliminations
Reportable segment information
Sales									47.7		81.3	63.0
Corporate Segment | Operating Segments
Reportable segment information
Sales									0.0		0.0	0.0
Income (loss) from unconsolidated affiliates									0.0		0.0
Adjusted EBITDA									(97.6)		(97.5)	(99.8)
Reconciling items to net loss:
Depreciation and amortization									7.6		8.6	3.6
Loss on impairment and disposal of assets									25.4			0.0
Gain (Loss) on sale of business, net									0.0		0.0	0.0
Interest expense									(118.3)		(132.2)	(172.0)
Debt extinguishment costs									(2.2)		(58.8)
Unrealized (gain) loss on derivatives									0.0		0.0	0.0
Gain on sale of unconsolidated affiliates									0.0
Corporate Segment | Operating Segments | Sales Revenue, Segment
Reportable segment information
Sales									0.0		0.0	0.0
Corporate Segment | Operating Segments | Intersubsegment Eliminations
Reportable segment information
Sales									$ 0.0		$ 0.0	$ 0.0

[1] Adjusted EBITDA for the Fuel Products segment for the year ended December 31, 2019 included a $6.5 million gain recorded in cost of sales in the consolidated statements of operations for proceeds received under the Company’s business interruption insurance policy. The Company incurred business losses due to increased costs arising from a 2012 pipeline rupture in northwest Louisiana. As a result, the Company filed a contingent business interruption claim. Specifically, the losses included a loss of throughput at the Shreveport refinery and additional crude transportation expenses.