Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating activities
Net income	$ 810,474	$ 616,757	$ 687,240
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	241,635	167,691	147,487
Excess tax benefits from share-based compensation	(4,232)	(3,134)	(12,021)
Loss (gain) on sale of property, plant, and equipment	1,579	(3,989)	(15,237)
Deferred income taxes	3,891	65,990	33,226
Share-based compensation	20,716	16,892	19,719
Foreign exchange gain	0	(14,051)	0
Changes in operating assets and liabilities:
Trade accounts receivable, net	(72,041)	(19,273)	(53,544)
Merchandise inventories, net	(73,173)	(9,923)	(64,214)
Trade accounts payable	364,639	61,474	240,717
Other short-term assets and liabilities	(97,864)	(1,544)	37,271
Other long-term assets and liabilities	(50,460)	(61,847)	(74,566)
Changes in operating assets and liabilities	334,690	198,286	258,838
Net cash provided by operating activities	1,145,164	815,043	946,078
Investing activities
Purchases of property, plant and equipment	(232,422)	(156,760)	(160,643)
Proceeds from sale of property, plant, and equipment	14,665	21,275	28,811
Acquisition of businesses and other investing activities	(278,367)	(1,494,795)	(462,167)
Net cash used in investing activities	(496,124)	(1,630,280)	(593,999)
Financing activities
Proceeds from debt	5,064,291	6,630,294	4,350,000
Payments on debt	(5,124,265)	(4,350,222)	(4,100,000)
Payments on acquired debt	0	(833,775)	0
Share-based awards exercised	(10,227)	(5,239)	(16,147)
Excess tax benefits from share-based compensation	0	0	12,021
Dividends paid	(415,983)	(395,475)	(386,863)
Purchase of stock	(91,983)	(173,524)	(181,417)
Other financing activities	(30,663)	0	0
Net cash (used in) provided by financing activities	(608,830)	872,059	(322,406)
Effect of exchange rate changes on cash	(21,562)	15,198	1,575
Net increase in cash and cash equivalents	18,648	72,020	31,248
Cash and cash equivalents at beginning of year	314,899	242,879	211,631
Cash and cash equivalents at end of year	333,547	314,899	242,879
Supplemental disclosures of cash flow information
Income taxes	236,536	298,827	374,865
Interest	$ 102,131	$ 38,401	$ 19,043