Noncontrolling interest (Details 3) - USD ($) $ in Millions	Mar. 31, 2017	Jun. 27, 2016	Feb. 07, 2013
Dakota Prairie Refining, LLC [Member] | WBI Energy [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Previous percentage of ownership			50.00%
Percentage of ownership acquired		50.00%
Dakota Prairie Refining, LLC [Member] | Calumet [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Previous percentage of ownership			50.00%
Refining [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reversal of a liability accrual	$ 7.0
Reversal of a liability accrual, net of tax	$ 4.3