Revenue Recognition Product Vertcal (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Product Revenue [Abstract]
Fastening Systems	24.60%	20.40%	24.50%	20.60%
Fluid Power	14.60%	16.30%	14.70%	15.70%
Specialty Chemicals	12.60%	14.50%	12.30%	14.30%
Cutting Tools and Abrasives	13.70%	14.20%	13.50%	14.30%
Electrical	10.60%	11.70%	10.90%	11.90%
Aftermarket Automotive Supplies	7.60%	8.40%	8.00%	8.80%
Safety	4.60%	4.20%	4.60%	4.20%
Welding and Metal Repair	1.70%	2.20%	1.90%	2.20%
Other Products	10.00%	8.10%	9.60%	8.00%
Total Products	100.00%	100.00%	100.00%	100.00%