Acquisitions (Details) - USD ($) $ in Thousands	1 Months Ended				12 Months Ended
	Oct. 31, 2018	Sep. 29, 2018	May 31, 2018	Jan. 31, 2018	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016	Oct. 05, 2018
Business Combinations [Abstract]
Payments to Acquire Businesses, Net of Cash Acquired	$ 49,200		$ 51,300		$ 107,727	$ 12,144	$ 8,511
Goodwill			19,600		1,229,159	1,301,093	1,225,893	$ 8,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets			$ 600					8,200
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	15 years		15 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment			$ 15,200					11,200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			15,900					$ 21,800
Gain (Loss) on Sale of Other Investments		$ 3,000
Proceeds from sale of investment in subsidiary			80,000		82,760	0	0
Gain (Loss) on Disposition of Business			$ 15,600		(12,545)	(885)	$ 0
Acquisition Of Noncontrolling Interest					19,100
Proceeds from Divestiture of Businesses				$ 2,800
Assets Held-for-sale, Not Part of Disposal Group						37,800
Liabilities for sale					$ 0	19,172
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down						$ 900