Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Net sales	$ 3,985,909	$ 3,685,243	$ 11,519,193	$ 10,560,042
Cost of goods sold	2,802,487	2,584,320	8,071,973	7,432,263
Gross profit	1,183,422	1,100,923	3,447,220	3,127,779
Operating expenses:
Selling, administrative and other expenses	850,156	793,957	2,486,162	2,221,096
Depreciation and amortization	34,983	35,220	108,623	98,072
Total operating expenses	885,139	829,177	2,594,785	2,319,168
Income before income taxes	298,283	271,746	852,435	808,611
Income taxes	107,767	98,000	306,708	274,119
Net income	190,516	173,746	545,727	534,492
Basic net income per common share	$ 1.25	$ 1.12	$ 3.56	$ 3.45
Diluted net income per common share	$ 1.24	$ 1.12	$ 3.53	$ 3.43
Dividends declared per common share	$ 0.5750	$ 0.5375	$ 1.7250	$ 1.6125
Weighted average common shares outstanding	153,018	154,567	153,401	154,835
Dilutive effect of stock options and non-vested restricted stock awards	1,080	1,096	1,062	1,082
Weighted average common shares outstanding - assuming dilution	154,098	155,663	154,463	155,917
Comprehensive income	$ 95,077	$ 192,317	$ 496,528	$ 454,332