Revenue Recognition Product Vertcal (Details)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Product Revenue [Abstract]
Fastening Systems	24.00%	21.00%
Fluid Power	15.00%	15.00%
Specialty Chemicals	12.00%	14.00%
Cutting Tools and Abrasives	15.00%	14.00%
Electrical	11.00%	12.00%
Aftermarket Automotive Supplies	8.00%	9.00%
Safety	5.00%	4.00%
Welding and Metal Repair	2.00%	2.00%
Other Products	9.00%	8.00%
Total Products	100.00%	100.00%