Segments and Related Information - Schedule of Reportable Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Sales	$ 692.6	$ 851.3
Gain (loss) from unconsolidated affiliates	0.0	3.8
Adjusted EBITDA	83.7	59.7
Reconciling items to net loss:
Depreciation and amortization	31.5	33.0
Effect of LIFO liquidation and Inventory write-down	66.5	(38.0)
Gain on sale of unconsolidated affiliate		(1.2)
Non-recurring charges	(1.2)
Unrealized (gain) loss on derivatives	(31.6)	2.6
Interest expense	29.3	32.3
(Gain) loss on debt extinguishment	0.0	(0.4)
Loss on impairment and disposal of assets	6.0	11.7
Equity-based compensation and other items	(2.9)	3.4
Income tax expense from continuing operations	0.5	(0.1)
Net loss from continuing operations	(14.4)	16.4
External Customers [Member]
Segment Reporting Information [Line Items]
Sales	692.6	851.3
Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Sales	0.0	0.0
Operating Segments [Member] | Specialty Product [Member]
Segment Reporting Information [Line Items]
Sales	344.3	375.0
Gain (loss) from unconsolidated affiliates	0.0	3.8
Adjusted EBITDA	64.5	58.4
Reconciling items to net loss:
Depreciation and amortization	11.8	11.5
Effect of LIFO liquidation and Inventory write-down	(22.2)	5.7
Gain on sale of unconsolidated affiliate		(1.2)
Unrealized (gain) loss on derivatives	0.3	(0.5)
Interest expense	0.0	0.0
(Gain) loss on debt extinguishment		0.0
Loss on impairment and disposal of assets	1.5	0.0
Operating Segments [Member] | Specialty Product [Member] | External Customers [Member]
Segment Reporting Information [Line Items]
Sales	326.9	352.2
Operating Segments [Member] | Specialty Product [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Sales	17.4	22.8
Operating Segments [Member] | Fuel Product [Member]
Segment Reporting Information [Line Items]
Sales	373.7	510.1
Gain (loss) from unconsolidated affiliates	0.0	0.0
Adjusted EBITDA	39.2	25.9
Reconciling items to net loss:
Depreciation and amortization	17.8	19.6
Effect of LIFO liquidation and Inventory write-down	(44.3)	32.3
Gain on sale of unconsolidated affiliate		0.0
Unrealized (gain) loss on derivatives	(31.9)	(2.1)
Interest expense	(1.7)	2.8
(Gain) loss on debt extinguishment		0.0
Loss on impairment and disposal of assets	0.0	11.7
Operating Segments [Member] | Fuel Product [Member] | External Customers [Member]
Segment Reporting Information [Line Items]
Sales	365.7	499.1
Operating Segments [Member] | Fuel Product [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Sales	8.0	11.0
Operating Segments [Member] | Corporate Segment [Member]
Segment Reporting Information [Line Items]
Sales	0.0	0.0
Gain (loss) from unconsolidated affiliates	0.0	0.0
Adjusted EBITDA	(20.0)	(24.6)
Reconciling items to net loss:
Depreciation and amortization	1.9	1.9
Effect of LIFO liquidation and Inventory write-down	0.0	0.0
Gain on sale of unconsolidated affiliate		0.0
Unrealized (gain) loss on derivatives	0.0	0.0
Interest expense	31.0	29.5
(Gain) loss on debt extinguishment		0.4
Loss on impairment and disposal of assets	4.5	0.0
Operating Segments [Member] | Corporate Segment [Member] | External Customers [Member]
Segment Reporting Information [Line Items]
Sales	0.0	0.0
Operating Segments [Member] | Corporate Segment [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Sales	0.0	0.0
Eliminations [Member]
Segment Reporting Information [Line Items]
Sales	(25.4)
Gain (loss) from unconsolidated affiliates	0.0
Adjusted EBITDA	0.0
Reconciling items to net loss:
Depreciation and amortization	0.0
Effect of LIFO liquidation and Inventory write-down	0.0
Unrealized (gain) loss on derivatives	0.0
Interest expense	0.0
Loss on impairment and disposal of assets	0.0
Eliminations [Member] | External Customers [Member]
Segment Reporting Information [Line Items]
Sales	0.0
Eliminations [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Sales	$ (25.4)
Eliminations [Member] | Eliminations [Member]
Segment Reporting Information [Line Items]
Sales		(33.8)
Gain (loss) from unconsolidated affiliates		0.0
Adjusted EBITDA
Reconciling items to net loss:
Depreciation and amortization		0.0
Effect of LIFO liquidation and Inventory write-down		0.0
Gain on sale of unconsolidated affiliate		0.0
Unrealized (gain) loss on derivatives		0.0
Interest expense		0.0
(Gain) loss on debt extinguishment		0.0
Loss on impairment and disposal of assets		0.0
Eliminations [Member] | Eliminations [Member] | External Customers [Member]
Segment Reporting Information [Line Items]
Sales		0.0
Eliminations [Member] | Eliminations [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Sales		$ (33.8)