Condensed Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019		Jun. 30, 2018	Jun. 30, 2019		Jun. 30, 2018
Income Statement [Abstract]
Net sales	$ 4,934,260		$ 4,822,065	$ 9,671,093		$ 9,408,359
Cost of goods sold	3,335,679		3,300,479	6,564,344		6,450,966
Gross profit	1,598,581		1,521,586	3,106,749		2,957,393
Operating expenses:
Selling, administrative and other expenses	1,216,913		1,148,217	2,414,133		2,281,988
Depreciation and amortization	66,154		58,451	128,131		116,814
Provision for doubtful accounts	5,962		3,666	9,931		6,367
Total operating expenses	1,289,029		1,210,334	2,552,195		2,405,169
Non-operating expenses (income):
Interest expense	23,296		26,476	47,179		50,585
Other	(15,873)		(15,495)	(6,266)		(27,951)
Total non-operating expenses	7,423		10,981	40,913		22,634
Income before income taxes	302,129		300,271	513,641		529,590
Income taxes	77,699		73,299	128,961		126,042
Net income	$ 224,430		$ 226,972	$ 384,680		$ 403,548
Basic net income per common share (usd per share)	$ 1.54		$ 1.55	$ 2.63		$ 2.75
Diluted net income per common share (usd per share)	1.53		1.54	2.62		2.74
Dividends declared per common share (usd per share)	$ 0.7625		$ 0.7200	$ 1.5250		$ 1.4400
Weighted average common shares outstanding (in shares)	146,075		146,748	146,029		146,738
Dilutive effect of stock options and non-vested restricted stock awards (in shares)	661		512	684		548
Weighted average common shares outstanding - assuming dilution (in shares)	146,736		147,260	146,713		147,286
Other comprehensive (loss) income, net of income taxes:
Foreign currency translation adjustments	$ 10,864		$ (163,993)	$ 37,981		$ (121,113)
Cash flow and net investment hedge adjustments, net of income taxes in 2019 — $(7,726) and $(1,931); 2018 — $12,115 and $5,935 respectively	(20,889)		32,755	(5,221)		16,045
Pension and postretirement benefit adjustments, net of income taxes in 2019 — $1,786 and $3,574; 2018 — $2,642 and $5,290 respectively	4,833		7,145	9,665		14,309
Other comprehensive (loss) income, net of income taxes	(5,192)	[1]	(124,093)	42,425	[1]	(90,759)
Comprehensive income	$ 219,238		$ 102,879	$ 427,105		$ 312,789

[1] Includes the effects of reclassifying realized currency losses of $27,037 out of accumulated other comprehensive loss into earnings in connection with the March 7, 2019 sale of Grupo Auto Todo. Refer to the accumulated other comprehensive loss footnote for further details.