Segments and Related Information - Schedule of Reportable Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Reportable segment information
Sales	$ 1,100.4	$ 1,149.4	$ 3,239.9	$ 3,204.5
Adjusted EBITDA	49.8	75.4	138.2	220.8
Reconciling items to net loss:
Depreciation and amortization	45.3	43.6	136.6	123.7
LCM / LIFO (gain) loss	9.4	(4.5)	8.9	9.4
Interest expense	57.7	58.7	175.3	163.7
Debt extinguishment costs		0.3	0.3	5.5
Unrealized (gain) loss on derivatives	(13.6)	36.3	(52.3)	(18.8)
RINs mark-to-market gain	32.8	(173.4)	(26.1)	(215.9)
Other non-recurring expenses	12.1	2.5	72.1	35.5
Equity-based compensation and other items	7.0	13.8	4.4	21.0
Income tax expense	0.7	0.5	1.4	1.4
Noncontrolling interest adjustments	(1.0)	(2.2)	(1.1)	(0.8)
Net income (loss)	(100.6)	99.8	(181.3)	96.1
Capital expenditures	19.4	48.0	69.6	269.2
PP&E, net	1,453.3	1,526.9	1,453.3	1,526.9	$ 1,506.3
External customers
Reportable segment information
Sales	1,100.4	1,149.4	3,239.9	3,204.5
Eliminations
Reportable segment information
Sales	(6.4)	(2.6)	(18.6)	(13.3)
Eliminations | Inter-segment sales
Reportable segment information
Sales	(6.4)	(2.6)	(18.6)	(13.3)
Specialty Products and Solutions
Reconciling items to net loss:
Gain on business interruption insurance recovery		7.1		9.5
Specialty Products and Solutions | Operating Segments
Reportable segment information
Sales	720.3	748.2	2,160.1	2,181.6
Adjusted EBITDA	42.6	38.6	150.2	175.6
Reconciling items to net loss:
Depreciation and amortization	17.4	19.0	53.1	54.2
LCM / LIFO (gain) loss	4.2	(4.4)	1.3	(1.7)
Interest expense	5.6	7.1	17.3	20.4
Debt extinguishment costs			0.1
Unrealized (gain) loss on derivatives	(13.6)	26.2	(52.3)	(22.6)
RINs mark-to-market gain	22.6	(118.3)	(16.9)	(146.9)
Capital expenditures	9.4	25.4	41.0	65.4
PP&E, net	355.7	375.7	355.7	375.7
Specialty Products and Solutions | Operating Segments | External customers
Reportable segment information
Sales	714.0	745.7	2,141.8	2,168.5
Specialty Products and Solutions | Operating Segments | Inter-segment sales
Reportable segment information
Sales	6.3	2.5	18.3	13.1
Performance Brands
Reconciling items to net loss:
Gain on business interruption insurance recovery		3.2		8.2
Performance Brands | Operating Segments
Reportable segment information
Sales	80.4	75.3	256.4	239.7
Adjusted EBITDA	13.6	13.2	41.1	41.8
Reconciling items to net loss:
Depreciation and amortization	2.2	2.5	6.5	7.4
LCM / LIFO (gain) loss	0.8	0.1	0.8	2.2
Interest expense			0.1	0.1
Capital expenditures	0.2	0.4	0.8	1.4
PP&E, net	32.0	33.2	32.0	33.2
Performance Brands | Operating Segments | External customers
Reportable segment information
Sales	80.3	75.2	256.1	239.5
Performance Brands | Operating Segments | Inter-segment sales
Reportable segment information
Sales	0.1	0.1	0.3	0.2
Montana/Renewables
Reconciling items to net loss:
Gain on business interruption insurance recovery				28.4
Montana/Renewables | Operating Segments
Reportable segment information
Sales	306.1	328.5	842.0	796.5
Adjusted EBITDA	12.7	38.2	5.8	56.0
Reconciling items to net loss:
Depreciation and amortization	25.5	21.9	76.3	61.3
LCM / LIFO (gain) loss	4.4	(0.2)	6.8	8.9
Interest expense	15.7	18.4	48.7	48.3
Unrealized (gain) loss on derivatives		10.1		3.8
RINs mark-to-market gain	10.2	(55.1)	(9.2)	(69.0)
Capital expenditures	8.9	22.1	25.1	202.0
PP&E, net	1,061.1	1,116.0	1,061.1	1,116.0
Montana/Renewables | Operating Segments | External customers
Reportable segment information
Sales	306.1	328.5	842.0	796.5
Corporate | Operating Segments
Reportable segment information
Adjusted EBITDA	(19.1)	(14.6)	(58.9)	(52.6)
Reconciling items to net loss:
Depreciation and amortization	0.2	0.2	0.7	0.8
Interest expense	36.4	33.2	109.2	94.9
Debt extinguishment costs		0.3	0.2	5.5
Capital expenditures	0.9	0.1	2.7	0.4
PP&E, net	$ 4.5	$ 2.0	$ 4.5	$ 2.0