Revenue Recognition - Product Type (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Product Revenue [Abstract]
Fastening Systems	22.30%	24.10%	22.70%	24.00%
Fluid Power	12.60%	15.10%	13.20%	15.20%
Specialty Chemicals	12.20%	13.10%	13.10%	11.60%
Cutting Tools and Abrasives	13.30%	11.70%	11.70%	13.10%
Electrical	10.00%	10.40%	10.20%	10.80%
Aftermarket Automotive Supplies	7.00%	7.60%	7.10%	7.90%
Safety	7.00%	4.70%	6.40%	4.70%
Welding and Metal Repair	1.40%	1.30%	1.40%	1.50%
Other Products	14.20%	12.00%	14.20%	11.20%
Total Products	100.00%	100.00%	100.00%	100.00%