Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Consolidated Statements of Income
Sales	$ 1,728,025	$ 1,601,558	$ 5,028,003	$ 4,693,799
Cost of goods sold, including warehouse and distribution expenses	848,862	796,065	2,478,302	2,346,765
Gross profit	879,163	805,493	2,549,701	2,347,034
Selling, general and administrative expenses	578,783	542,175	1,701,976	1,592,612
Operating income	300,380	263,318	847,725	754,422
Other income (expense):
Interest expense	(13,295)	(10,451)	(36,162)	(28,722)
Interest income	514	565	1,460	1,850
Other, net	690	550	2,022	1,294
Total other expense	(12,091)	(9,336)	(32,680)	(25,578)
Income before income taxes	288,289	253,982	815,045	728,844
Provision for income taxes	101,800	94,650	297,100	275,900
Net income	$ 186,489	$ 159,332	$ 517,945	$ 452,944
Earnings per share-basic:
Earnings per share - basic	$ 1.72	$ 1.34	$ 4.71	$ 3.67
Weighted-average common shares outstanding - basic	108,307	118,546	110,034	123,448
Earnings per share-assuming dilution:
Earnings per share - assuming dilution	$ 1.69	$ 1.32	$ 4.63	$ 3.60
Weighted-average common shares outstanding - assuming dilution	110,193	120,539	111,885	125,670