Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Condensed Consolidated Statements of Income
Sales	$ 3,091,595	$ 2,589,874	$ 5,568,082	$ 5,000,482
Cost of goods sold, including warehouse and distribution expenses	1,454,415	1,221,587	2,634,996	2,352,905
Gross profit	1,637,180	1,368,287	2,933,086	2,647,577
Selling, general and administrative expenses	900,690	870,213	1,773,035	1,704,717
Operating income	736,490	498,074	1,160,051	942,860
Other income (expense):
Interest expense	(41,723)	(34,538)	(81,109)	(68,829)
Interest income	635	603	1,310	1,157
Other, net	5,008	832	(182)	3,935
Total other expense	(36,080)	(33,103)	(79,981)	(63,737)
Income before income taxes	700,410	464,971	1,080,070	879,123
Provision for income taxes	168,743	111,290	247,965	204,290
Net income	$ 531,667	$ 353,681	$ 832,105	$ 674,833	[1]
Earnings per share-basic:
Earnings per share	$ 7.16	$ 4.56	$ 11.15	$ 8.65
Weighted-average common shares outstanding - basic	74,205	77,613	74,611	78,047
Earnings per share-assuming dilution:
Earnings per share	$ 7.10	$ 4.51	$ 11.06	$ 8.56
Weighted-average common shares outstanding - assuming dilution	74,833	78,412	75,246	78,854

[1] Note: Certain prior period amounts have been reclassified to conform to current period presentation.