Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Net sales	$ 15,339,713	$ 15,280,044	$ 15,341,647
Cost of goods sold	10,740,106	10,724,192	10,747,886
Gross margin	4,599,607	4,555,852	4,593,761
Operating expenses:
Selling, administrative, and other expenses	3,370,833	3,277,390	3,314,030
Depreciation and amortization	147,487	141,675	148,313
Provision for doubtful accounts	11,515	12,373	7,192
Total operating expenses	3,529,835	3,431,438	3,469,535
Non-operating (income) expenses:
Interest expense	21,084	21,662	25,088
Other	(25,652)	(20,929)	(18,601)
Total non-operating (income) expenses	(4,568)	733	6,487
Income before income taxes	1,074,340	1,123,681	1,117,739
Income taxes	$ 387,100	$ 418,009	$ 406,453
Basic net income per common share (in dollars per share)	$ 4.61	$ 4.65	$ 4.64
Diluted net income per common share (in dollars per share)	$ 4.59	$ 4.63	$ 4.61
Weighted average common shares outstanding (in shares)	149,051	151,667	153,299
Dilutive effect of stock options and nonvested restricted stock awards (in shares)	753	829	1,076
Weighted average common shares outstanding — assuming dilution (in shares)	149,804	152,496	154,375
Net income	$ 687,240	$ 705,672	$ 711,286
Other comprehensive loss, net of tax:
Foreign currency translation adjustment	(8,957)	(207,986)	(149,379)
Pension and postretirement benefit adjustments, net of income taxes of 2016 — $50,144; 2015 — $5,335; 2014 — $112,993	(73,446)	(2,421)	(173,177)
Other comprehensive loss, net of tax	(82,403)	(210,407)	(322,556)
Comprehensive income	$ 604,837	$ 495,265	$ 388,730