Revenue Recognition - Product Type (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Product Revenue [Abstract]
Fastening Systems	23.80%	24.30%	23.30%	23.90%
Fluid Power	13.20%	15.20%	13.80%	15.20%
Specialty Chemicals	12.50%	13.00%	12.90%	11.50%
Cutting Tools and Abrasives	12.80%	11.70%	11.90%	13.10%
Electrical	10.00%	10.70%	10.40%	11.10%
Aftermarket Automotive Supplies	6.00%	7.60%	7.20%	8.00%
Safety	6.10%	4.70%	6.20%	4.70%
Welding and Metal Repair	1.50%	1.60%	1.50%	1.70%
Other Products	14.10%	11.20%	12.80%	10.80%
Total Products	100.00%	100.00%	100.00%	100.00%