Condensed Consolidated Statements of Income and Comprehensive 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
Income Statement [Abstract]
Net sales	$ 3,685,243	$ 3,375,778	$ 10,560,042	$ 9,894,902
Cost of goods sold	2,584,320	2,399,742	7,432,263	7,027,469
Gross profit	1,100,923	976,036	3,127,779	2,867,433
Operating expenses:
Selling, administrative & other expenses	793,957	678,894	2,221,096	2,027,098
Depreciation and amortization	35,220	25,609	98,072	73,329
Total operating expenses	829,177	704,503	2,319,168	2,100,427
Income before income taxes	271,746	271,533	808,611	767,006
Income taxes	98,000	98,590	274,119	279,190
Net income	173,746	172,943	534,492	487,816
Basic net income per common share	$ 1.12	$ 1.11	$ 3.45	$ 3.14
Diluted net income per common share	$ 1.12	$ 1.11	$ 3.43	$ 3.11
Dividends declared per common share	$ 0.5375	$ 0.4950	$ 1.6125	$ 1.4850
Weighted average common shares outstanding	154,567	155,147	154,835	155,568
Dilutive effect of stock options and non-vested restricted stock awards	1,096	988	1,082	1,038
Weighted average common shares outstanding-assuming dilution	155,663	156,135	155,917	156,606
Comprehensive income	$ 192,317	$ 210,542	$ 454,332	$ 549,009