Condensed Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net sales	$ 4,722,922	$ 4,095,906	$ 14,131,281	$ 12,101,725
Cost of goods sold	3,238,687	2,869,016	9,689,653	8,479,402
Gross profit	1,484,235	1,226,890	4,441,628	3,622,323
Operating expenses:
Selling, administrative and other expenses	1,119,266	931,500	3,401,254	2,715,799
Depreciation and amortization	61,082	40,276	177,896	117,640
Provision for doubtful accounts	4,939	3,508	11,306	9,182
Total operating expenses	1,185,287	975,284	3,590,456	2,842,621
Non-operating expenses (income):
Interest expense	25,084	9,038	75,669	23,263
Other	(17,871)	(3,787)	(45,822)	(30,828)
Total non-operating expenses (income)	7,213	5,251	29,847	(7,565)
Income before income taxes	291,735	246,355	821,325	787,267
Income taxes	71,508	87,913	197,550	278,693
Net income	$ 220,227	$ 158,442	$ 623,775	$ 508,574
Basic net income per common share (usd per share)	$ 1.50	$ 1.08	$ 4.25	$ 3.45
Diluted net income per common share (usd per share)	1.49	1.08	4.23	3.44
Dividends declared per common share (usd per share)	$ 0.72	$ 0.6750	$ 2.16	$ 2.025
Weighted average common shares outstanding (in shares)	146,763	146,720	146,746	147,312
Dilutive effect of stock options and non-vested restricted stock awards (in shares)	690	502	574	561
Weighted average common shares outstanding - assuming dilution (in shares)	147,453	147,222	147,320	147,873
Other comprehensive (loss) income, net of income taxes:
Foreign currency translation adjustment	$ (26,591)	$ 38,675	$ (147,703)	$ 118,852
Net gain on cash flow and net investment hedges, net of income taxes in 2018 — $278 and $6,213, respectively	752	0	16,797	0
Pension and postretirement benefit adjustments, net of income taxes in 2018 — $2,560 and $7,850; 2017 — $3,589 and $10,728, respectively	6,912	5,780	21,221	17,235
Other comprehensive (loss) income, net of income taxes	(18,927)	44,455	(109,685)	136,087
Comprehensive income	$ 201,300	$ 202,897	$ 514,090	$ 644,661