Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Condensed Consolidated Statements of Income
Sales	$ 3,207,638	$ 2,666,528	$ 8,775,720	$ 7,667,010
Cost of goods sold, including warehouse and distribution expenses	1,527,170	1,243,998	4,162,166	3,596,903
Gross profit	1,680,468	1,422,530	4,613,554	4,070,107
Selling, general and administrative expenses	955,455	886,167	2,728,490	2,590,884
Operating income	725,013	536,363	1,885,064	1,479,223
Other income (expense):
Interest expense	(41,668)	(35,858)	(122,777)	(104,687)
Interest income	582	656	1,892	1,813
Other, net	2,479	732	2,297	4,667
Total other expense	(38,607)	(34,470)	(118,588)	(98,207)
Income before income taxes	686,406	501,893	1,766,476	1,381,016
Provision for income taxes	159,154	110,600	407,119	314,890
Net income	$ 527,252	$ 391,293	$ 1,359,357	$ 1,066,126
Earnings per share-basic:
Earnings per share	$ 7.13	$ 5.14	$ 18.28	$ 13.77
Weighted-average common shares outstanding - basic	73,916	76,172	74,377	77,415
Earnings per share-assuming dilution:
Earnings per share	$ 7.07	$ 5.08	$ 18.12	$ 13.63
Weighted-average common shares outstanding - assuming dilution	74,586	76,969	75,026	78,220