Consolidated Statements of Partners' Capital - USD ($) $ in Millions	Total	Accumulated Other Comprehensive Income (Loss)	General Partner	Limited Partners
Beginning balance at Dec. 31, 2016	$ 218.7	$ (8.3)	$ 15.8	$ 211.2
Increase (Decrease) in Partners' Capital [Roll Forward]
Other comprehensive income (loss)	1.1	1.1	0.0	0.0
Net loss	(103.8)	0.0	(2.1)	(101.7)
Settlement of tax withholdings on equity-based incentive compensation	(0.9)	0.0	0.0	(0.9)
Amortization of phantom units	4.7	0.0	0.0	4.7
Contributions from Calumet GP, LLC	0.1	0.0	0.1	0.0
Ending balance at Dec. 31, 2017	119.9	(7.2)	13.8	113.3
Increase (Decrease) in Partners' Capital [Roll Forward]
Other comprehensive income (loss)	(1.5)	(1.5)	0.0	0.0
Net loss	(55.1)	0.0	(1.1)	(54.0)
Settlement of tax withholdings on equity-based incentive compensation	(1.1)	0.0	0.0	(1.1)
Amortization of phantom units	3.4	0.0	0.0	3.4
Contributions from Calumet GP, LLC	0.1	0.0	0.1	0.0
Ending balance at Dec. 31, 2018	65.7	(8.7)	12.8	61.6
Increase (Decrease) in Partners' Capital [Roll Forward]
Other comprehensive income (loss)	(1.9)	(1.9)	0.0	0.0
Net loss	(43.6)	0.0		(42.7)	[1]
Settlement of tax withholdings on equity-based incentive compensation	(0.5)	0.0	0.0	(0.5)
Amortization of phantom units	1.8	0.0	0.0	1.8
Contributions from Calumet GP, LLC	0.1	0.0	0.1	0.0
Ending balance at Dec. 31, 2019	$ 21.6	$ (10.6)	$ 12.0	$ 20.2

[1] The sum of the four quarters may not equal the total year due to rounding.