Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Consolidated Statements of Income
Sales	$ 11,604,493	$ 10,149,985	$ 9,536,428
Cost of goods sold, including warehouse and distribution expenses	5,518,801	4,755,294	4,496,462
Gross profit	6,085,692	5,394,691	5,039,966
Selling, general and administrative expenses	3,666,356	3,473,965	3,224,782
Operating income	2,419,336	1,920,726	1,815,184
Other income (expense):
Interest expense	(161,126)	(139,975)	(122,129)
Interest income	2,491	2,545	2,521
Other, net	5,704	7,033	(1,489)
Total other expense	(152,931)	(130,397)	(121,097)
Income before income taxes	2,266,405	1,790,329	1,694,087
Provision for income taxes	514,103	399,287	369,600
Net income	$ 1,752,302	$ 1,391,042	$ 1,324,487
Earnings per share-basic:
Earnings per share	$ 23.74	$ 18.07	$ 16.27
Weighted-average common shares outstanding - basic	73,817	76,985	81,406
Earnings per share-assuming dilution:
Earnings per share	$ 23.53	$ 17.88	$ 16.10
Weighted-average common shares outstanding - assuming dilution	74,462	77,788	82,280