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Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Supplemental Cash Flow Information [Abstract]
Interest			$ 52,108	$ 33,640
Income taxes			207,474	179,445
Unrealized gain (loss) from foreign currency hedging activities	$ (406)	$ 26	$ 1,079	$ (1,278)
Noncash or Part Noncash Acquisitions [Line Items]
Business Acquisition, non-cash transaction	1,300
Henry Schein One [Member] | Scenario, Plan [Member] | Internet Brands Inc [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Business Acquisition, non-cash transaction	$ 337,000
Noncontrolling Interest, Ownership Percentage by Parent	26.00%		26.00%
Henry Schein One [Member] | Scenario, Plan [Member] | Internet Brands Inc [Member] | Internet Brands Inc [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Business Acquisition, non-cash transaction	$ 95,000
Noncash or Part Noncash Acquisition, Interest Acquired	9.20%

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