Business Combinations (Schedule Of Intangible Assets) (Detail) - USD ($) $ in Millions	Mar. 29, 2019	Dec. 28, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	$ 2,088.9	$ 2,092.7
Intangible Assets, Accumulated Amortization	(1,391.4)	(1,348.4)
Total	697.5	744.3
Developed Product Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	1,222.0	1,220.3
Intangible Assets, Accumulated Amortization	(850.7)	(825.3)
Total	371.3	395.0
Trade Names And Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	72.9	72.9
Intangible Assets, Accumulated Amortization	(54.7)	(53.3)
Total	18.2	19.6
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	715.6	715.1
Intangible Assets, Accumulated Amortization	(422.7)	(406.5)
Total	292.9	308.6
Distribution Rights And Other Intellectual Property [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	78.4	84.4
Intangible Assets, Accumulated Amortization	(63.3)	(63.3)
Total	$ 15.1	$ 21.1