Business Combinations (Schedule Of Intangible Assets) (Detail) - USD ($) $ in Millions	Sep. 27, 2019	Dec. 28, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	$ 2,089.2	$ 2,092.7
Intangible Assets, Accumulated Amortization	(1,461.9)	(1,348.4)
Total	627.3	744.3
Developed Product Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	1,221.6	1,220.3
Intangible Assets, Accumulated Amortization	(892.2)	(825.3)
Total	329.4	395.0
Trade Names And Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	72.6	72.9
Intangible Assets, Accumulated Amortization	(57.4)	(53.3)
Total	15.2	19.6
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	717.2	715.1
Intangible Assets, Accumulated Amortization	(449.2)	(406.5)
Total	268.0	308.6
Distribution Rights And Other Intellectual Property [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	77.8	84.4
Intangible Assets, Accumulated Amortization	(63.1)	(63.3)
Total	$ 14.7	$ 21.1