Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Condensed Consolidated Statements of Income [Abstract]
Net sales	$ 3,285,560	$ 2,950,560	$ 9,444,742	$ 8,399,861
Cost of goods sold	2,337,028	2,097,529	6,731,302	5,964,045
Gross profit	948,532	853,031	2,713,440	2,435,816
Operating expenses:
Selling, administrative & other expenses	679,967	618,449	1,965,871	1,792,997
Depreciation and amortization	21,465	22,093	66,938	67,422
Total operating expenses	701,432	640,542	2,032,809	1,860,419
Income before income taxes	247,100	212,489	680,631	575,397
Income taxes	95,268	80,704	250,472	218,536
Net income	$ 151,832	$ 131,785	$ 430,159	$ 356,861
Basic net income per common share	$ 0.97	$ 0.84	$ 2.74	$ 2.26
Diluted net income per common share	$ 0.97	$ 0.83	$ 2.72	$ 2.25
Dividends declared per common share	$ 0.45	$ 0.41	$ 1.35	$ 1.23
Weighted average common shares outstanding	156,206	157,573	157,024	158,197
Dilutive effect of stock options and non-vested restricted stock awards	942	407	965	398
Weighted average common shares outstanding - assuming dilution	157,148	157,980	157,989	158,595