Revenue Recognition Product Vertcal (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Product Revenue [Abstract]
Fastening Systems	24.60%	20.50%	24.40%	20.70%
Fluid Power	14.80%	15.40%	14.70%	15.30%
Specialty Chemicals	12.30%	14.60%	12.30%	14.30%
Cutting Tools and Abrasives	13.40%	14.40%	13.40%	14.30%
Electrical	10.80%	11.80%	11.00%	12.10%
Aftermarket Automotive Supplies	7.80%	8.80%	8.20%	9.10%
Safety	4.70%	4.30%	4.70%	4.20%
Welding and Metal Repair	2.10%	2.10%	2.00%	2.20%
Other Products	9.50%	8.10%	9.30%	7.80%
Total Products	100.00%	100.00%	100.00%	100.00%