Business Combinations (Schedule Of Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net ) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	$ 2,287.1	$ 2,077.6
Acquired Companies Group [Member]
Business Combination, Separately Recognized Transactions [Line Items]
Fair value of total purchase consideration	331.2	27.6	$ 176.2
Net tangible assets acquired	29.7	(1.9)	8.0
Identified intangible assets	166.7	13.6	83.3
Deferred taxes	(5.8)	(1.3)	(13.6)
Goodwill	$ 140.6	$ 17.2	$ 98.5