Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities
Net income (loss)	$ (14.4)	$ 16.4
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	26.4	28.2
Amortization of turnaround costs	5.1	4.8
Non-cash interest expense	1.5	1.9
(Gain) loss on debt extinguishment	0.0	(0.4)
Unrealized (gain) loss on derivative instruments	(31.6)	2.6
Loss on impairment and disposal of assets	6.0	11.7
Operating lease expense	20.2	20.8
Operating lease payments	(20.1)	(20.6)
Equity-based compensation	(4.5)	2.2
Lower of cost or market inventory adjustment	66.3	(38.9)
Other non-cash activities	2.2	(4.0)
Changes in assets and liabilities:
Accounts receivable	(1.1)	(69.8)
Inventories	3.8	31.9
Prepaid expenses and other current assets	1.5	(3.5)
Derivative activity	(1.4)	(0.1)
Turnaround costs	(9.8)	(1.7)
Accounts payable	(65.3)	37.2
Accrued interest payable	11.2	14.4
Accrued salaries, wages and benefits	(8.5)	(6.8)
Other taxes payable	1.9	2.9
Other liabilities	(9.1)	(1.8)
Pension and postretirement benefits obligations	(0.2)	0.0
Net cash provided by (used in) operating activities	(19.9)	27.4
Investing activities
Additions to property, plant and equipment	(14.9)	(9.5)
Payments to Acquire Businesses, Net of Cash Acquired	(3.3)	0.0
Proceeds from sale of unconsolidated affiliate	0.0	5.0
Proceeds from sale of business, net	0.0	3.6
Net cash provided by discontinued operations	0.9	2.0
Net cash provided by (used in) investing activities	(17.3)	1.1
Net Cash Provided by (Used in) Financing Activities [Abstract]
Proceeds from borrowings — revolving credit facility	472.5	0.0
Repayments of borrowings — revolving credit facility	(325.3)	0.0
Repayments of borrowings — senior notes	0.0	23.2
Payments on finance lease obligations	(0.1)	(1.0)
Proceeds from inventory financing agreements	245.1	279.2
Payments on inventory financing agreements	(269.7)	(286.1)
Proceeds from other financing obligations	0.0	0.3
Payments on other financing obligations	(0.7)	(0.6)
Contributions from Calumet GP, LLC	0.0	0.1
Net cash provided by (used in) in financing activities	121.8	(31.3)
Net increase (decrease) in cash and cash equivalents	84.6	(2.8)
Cash and cash equivalents at beginning of period	19.1	155.7
Cash and cash equivalents at end of period	103.7	152.9
Cash and cash equivalents	103.7	152.9
Supplemental disclosure of non-cash investing activities
Non-cash property, plant and equipment additions	$ 10.8	$ 3.3