Statements of Consolidated Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	[1]
Income Statement [Abstract]
Net sales	$ 2,761,387	$ 2,574,024
Cost of goods sold	1,418,247	1,312,279
Gross profit	$ 1,343,140	$ 1,261,745
Percent to net sales	48.60%	49.00%
Selling, general and administrative expenses	$ 1,016,211	$ 1,002,355
Percent to net sales	36.80%	38.90%
Other general expense - net	$ 276	$ 17,554
Interest expense	25,695	25,732
Interest and net investment income	(1,280)	(487)
Other (income) expense - net	(4,367)	226
Income before income taxes	306,605	216,365
Income taxes	67,453	51,489
Net income	$ 239,152	$ 164,876
Net income per common share:
Basic (in dollars per share)	$ 2.58	$ 1.80
Diluted (in dollars per share)	$ 2.53	$ 1.75
Average shares outstanding - basic (in shares)	92,550,559	91,475,860
Average shares and equivalents outstanding - diluted (in shares)	94,541,859	94,114,114
Comprehensive income	$ 230,090	$ 183,886

[1] First quarter 2016 income taxes, net income, basic and diluted net income per common share and diluted average shares and equivalents outstanding are restated due to the adoption of ASU No. 2016-09 in the second quarter of 2016.