Statements of Consolidated Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 4,040,861	$ 3,965,006
Cost of goods sold	2,305,784	2,278,159
Gross profit	$ 1,735,077	$ 1,686,847
Percent to net sales	42.90%	42.50%
Selling, general and administrative expenses	$ 1,244,017	$ 1,214,565
Percent to net sales	30.80%	30.60%
Other general (income) expense - net	$ (458)	$ 2,990
Amortization	78,771	85,049
Interest expense	90,994	91,547
Interest and net investment income	(410)	(1,618)
Other expense (income) - net	23,309	(9,272)
Income before income taxes	298,854	303,586
Income taxes	53,617	53,459
Net income	$ 245,237	$ 250,127
Net income per share - basic (in dollars per share)	$ 2.67	$ 2.68
Net income per share - diluted (in dollars per share)	$ 2.62	$ 2.62
Average shares outstanding - basic (in shares)	91,952,828	93,339,564
Average shares and equivalents outstanding - diluted (in shares)	93,668,728	95,546,152