Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Consolidated Statements of Income
Sales	$ 1,585,009	$ 1,529,392
Cost of goods sold, including warehouse and distribution expenses	786,346	767,712
Gross profit	798,663	761,680
Selling, general and administrative expenses	547,579	514,179
Operating income	251,084	247,501
Other income (expense):
Interest expense	(11,400)	(9,131)
Interest income	477	627
Other, net	468	795
Total other expense	(10,455)	(7,709)
Income before income taxes	240,629	239,792
Provision for income taxes	86,300	92,300
Net income	$ 154,329	$ 147,492
Earnings per share-basic:
Earnings per share - basic	$ 1.38	$ 1.16
Denominator for basic earnings per share - weighted-average shares	111,557	126,970
Earnings per share-assuming dilution:
Earnings per share - assuming dilution	$ 1.36	$ 1.14
Denominator for diluted earnings per share - weighted-average shares	113,396	129,327