Statements of Consolidated Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Net sales	$ 3,279,462	$ 3,152,285	$ 9,073,011	$ 8,734,708
Cost of goods sold	1,643,173	1,577,733	4,539,184	4,497,721
Gross profit	$ 1,636,289	$ 1,574,552	$ 4,533,827	$ 4,236,987
Percent to net sales	49.90%	49.90%	50.00%	48.50%
Selling, general and administrative expenses	$ 1,058,128	$ 993,625	$ 3,114,455	$ 2,922,046
Percent to net sales	32.30%	31.50%	34.30%	33.50%
Other general expense - net	$ 813	$ 9,117	$ 21,100	$ 17,415
Interest expense	44,100	16,995	110,710	42,231
Interest and net investment income	(1,647)	32	(3,086)	(943)
Other (income) expense - net	(725)	4,061	(551)	4,493
Income before income taxes	535,620	550,722	1,291,199	1,251,745
Income taxes	148,887	176,231	361,526	395,913
Net income	$ 386,733	$ 374,491	$ 929,673	$ 855,832
Net income per common share:
Basic (in dollars per share)	$ 4.20	$ 4.06	$ 10.13	$ 9.26
Diluted (in dollars per share)	$ 4.08	$ 3.97	$ 9.85	$ 9.03
Average shares outstanding - basic (in shares)	91,992,854	92,196,458	91,752,482	92,398,962
Average shares and equivalents outstanding - diluted (in shares)	94,771,807	94,433,075	94,421,190	94,776,387
Comprehensive income	$ 390,601	$ 321,738	$ 858,547	$ 758,373