Business Combinations (Schedule Of Intangible Assets) (Detail) - USD ($) $ in Millions	Sep. 28, 2018	Dec. 29, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	$ 2,095.3	$ 1,555.3
Intangible Assets, Accumulated Amortization	(1,315.3)	(1,190.5)
Total	780.0	364.8	[1]
Developed Product Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	1,218.8	915.3
Intangible Assets, Accumulated Amortization	(806.8)	(729.9)
Total	412.0	185.4
Trade Names And Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	73.0	58.7
Intangible Assets, Accumulated Amortization	(52.2)	(48.6)
Total	20.8	10.1
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	717.2	512.1
Intangible Assets, Accumulated Amortization	(393.1)	(351.3)
Total	324.1	160.8
Distribution Rights And Other Intellectual Property [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	86.3	69.2
Intangible Assets, Accumulated Amortization	(63.2)	(60.7)
Total	$ 23.1	$ 8.5

[1] See Note 2 for a summary of adjustments