Revenue Recognition Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

The following table reflects the disaggregation of revenue by major source (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Sales by major source
Standard specialty products	$	173.9	$	283.7	$	443.1	$	576.0
Packaged and synthetic specialty products	58.8		60.7		116.5		120.6
Total specialty products	232.7		344.4		559.6		696.6
Fuel and fuel related products	184.4		495.0		504.4		937.9
Asphalt	36.6		57.5		82.3		113.7
Total fuel products	221.0		552.5		586.7		1,051.6
Total sales	$	453.7	$	896.9	$	1,146.3	$	1,748.2