Commitments and Contingencies Commitments and Contingencies Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Deferred Revenue, Noncurrent	$ 1.1	$ 1.2
Environmental Remediation Insurance Per Occurrence	10.0
Accrual for Environmental Loss Contingencies	29.0	$ 35.0
Deferred Branding Incentives Possibility Of Repayment	1.4
Deferred Branding Incentives Possibility Of Repayment By Branded Dealers	0.3
MACS [Member]
Loss Contingencies [Line Items]
Escrow Deposit	1.0
Emerge Energy Services L P [Member]
Loss Contingencies [Line Items]
Escrow Deposit	8.0
Sandford Oil [Member]
Loss Contingencies [Line Items]
Escrow Deposit	$ 3.0