Revenue (Tables)

12 Months Ended

Dec. 31, 2019

Revenue

Disaggregation of revenue

	For the Year Ended
	December 31,
	2019		2018		2017
Sales to do-it-yourself customers	$	5,612,390	$	5,351,035	$	5,113,288
Sales to professional service provider customers		4,369,541		4,035,898		3,724,220
Other sales and sales adjustments		168,054		149,495		140,218
Total sales	$	10,149,985	$	9,536,428	$	8,977,726