Unaudited Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Impairment of Long-Lived Assets to be Disposed of	$ 0.7	$ 16.2	$ 6.7	$ 27.9
Other Operating Income (Expense), Net	4.2	(2.2)	7.2	(0.9)
Sales	453.7		1,146.3	1,748.2
Cost of sales	364.4		1,002.7	1,505.1
Gross profit	89.3	107.1	143.6	243.1
Operating costs and expenses:
Selling	12.6	14.3	25.9	27.6
General and administrative	26.8	37.8	47.0	72.7
Transportation	24.8	31.6	55.6	67.5
Other Income Tax Expense (Benefit), Continuing Operations	(2.7)	4.7	2.3	9.8
Loss on impairment and disposal of assets	0.7	16.2	6.7	27.9
Operating income (loss)	22.9	4.7	(1.1)	38.5
Other income (expense):
Interest expense	(30.6)	(33.1)	(59.9)	(65.4)
Gain (Loss) from debt extinguishment	0.0	0.3	0.0	0.7
Gain on derivative instruments	11.3	10.3	49.8	19.4
Other	(0.2)	(1.3)	(1.1)	(6.6)
Total other expense	(19.1)	(21.2)	(9.0)	(38.7)
Net income (loss) before income taxes	3.8	(16.5)	(10.1)	(0.2)
Income tax expense from continuing operations	0.2	0.3	0.7	0.2
Net income (loss) from continuing operations	3.6	(16.8)	(10.8)	(0.4)
Net loss	3.6	(16.8)	(10.8)	(0.4)
Less:
General partner’s interest in net loss	0.1	(0.3)	(0.2)	0.0
Net income (loss) available to limited partners	$ 3.5	$ (16.5)	$ (10.6)	$ (0.4)
Weighted average limited partner units outstanding:
Basic and Diluted	78,664,183	78,212,837	78,532,405	78,111,857
Limited partners' interest basic net income (loss) per unit [Abstract]
Limited partners’ interest	$ 0.05	$ (0.21)	$ (0.13)	$ 0
Limited partners' interest diluted net income (loss) per unit
From continuing operations	0.05	(0.21)	(0.13)	0.00
Income (Loss) from Discontinued Operations, Net of Tax, Per Outstanding Limited Partnership Unit, Diluted	0.00	0.00	0.00	0.00
Limited partners' interest	$ 0.05	$ (0.21)	$ (0.13)	$ 0
Weighted Average Number of Shares Outstanding, Diluted	78,678,970	78,212,837	78,532,405	78,111,857
Oil and Gas, Refining and Marketing [Member]
Sales	$ 453.7	$ 896.9	$ 1,146.3	$ 1,748.2
Cost of sales		$ 789.8