Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Net sales	$ 15,280,044	$ 15,341,647	$ 14,077,843
Cost of goods sold	10,724,192	10,747,886	9,857,923
Gross margin	4,555,852	4,593,761	4,219,920
Operating expenses:
Selling, administrative, and other expenses	3,277,390	3,314,030	3,028,028
Depreciation and amortization	141,675	148,313	133,957
Provision for doubtful accounts	12,373	7,192	8,691
Total operating expenses	3,431,438	3,469,535	3,170,676
Non-operating expenses (income):
Interest expense	21,662	25,088	26,971
Other	(20,929)	(18,601)	(22,031)
Total non-operating expenses	733	6,487	4,940
Income before income taxes	1,123,681	1,117,739	1,044,304
Income taxes	418,009	406,453	359,345
Net income	$ 705,672	$ 711,286	$ 684,959
Basic net income per common share	$ 4.65	$ 4.64	$ 4.43
Diluted net income per common share	$ 4.63	$ 4.61	$ 4.40
Weighted average common shares outstanding	151,667	153,299	154,636
Dilutive effect of stock options and nonvested restricted stock awards	829	1,076	1,078
Weighted average common shares outstanding - assuming dilution	152,496	154,375	155,714
Net income	$ 705,672	$ 711,286	$ 684,959
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment	(207,986)	(149,379)	(168,703)
Pension and postretirement benefit adjustments, net of income taxes of 2015 - $5,335, 2014 - $112,993, and 2013 - ($175,297)	(2,421)	(173,177)	272,540
Other comprehensive (loss) income, net of tax	(210,407)	(322,556)	103,837
Comprehensive income	$ 495,265	$ 388,730	$ 788,796