Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of the Fair Value of Assets and Liabilities

The fair value hierarchy for our financial assets and liabilities accounted for at fair value on a recurring basis at March 31, 2019 and December 31, 2018, was as follows (in millions):

	As of March 31, 2019
	Level 1		Level 2			Level 3		Total
Assets
Commodity derivatives	$	—	$	213.4		$	—	$	213.4
Commodity investments	5.4		—			—		5.4
RIN commitment contracts	—		4.0			—		4.0
Total assets	5.4		217.4			—		222.8
Liabilities
Commodity derivatives	—		(174.4		)	—		(174.4		)
RIN commitment contracts	—		(6.4		)	—		(6.4		)
RINs Obligation deficit	—		(11.5		)	—		(11.5		)
J. Aron step-out liability	—		(384.8		)	—		(384.8		)
Total liabilities	—		(577.1		)	—		(577.1		)
Net liabilities	$	5.4	$	(359.7	)	$	—	$	(354.3	)

	December 31, 2018
	Level 1		Level 2			Level 3		Total
Assets
Commodity derivatives	$	—	$	459.8		$	—	$	459.8
Commodity investments	15.8		—			—		15.8
RIN commitment contracts	—		2.0			—		2.0
RINs Obligation surplus	—		—			—		—
Total assets	15.8		461.8			—		477.6
Liabilities
Commodity derivatives	—		(409.0		)	—		(409.0		)
RIN commitment contracts	—		(6.7		)	—		(6.7		)
RINs Obligation deficit	—		(11.8		)	—		(11.8		)
J. Aron step-out liability	—		(362.2		)	—		(362.2		)
Total liabilities	—		(789.7		)	—		(789.7		)
Net liabilities	$	15.8	$	(327.9	)	$	—	$	(312.1	)