Business Combinations (Schedule Of Intangible Assets) (Detail) - USD ($) $ in Millions	Jun. 29, 2018	Dec. 29, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	$ 1,683.2	$ 1,555.3
Intangible Assets, Accumulated Amortization	(1,261.0)	(1,190.5)
Total	422.2	364.8	[1]
Developed Product Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	991.9	915.3
Intangible Assets, Accumulated Amortization	(773.7)	(729.9)
Total	218.2	185.4
Trade Names And Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	63.9	58.7
Intangible Assets, Accumulated Amortization	(50.5)	(48.6)
Total	13.4	10.1
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	556.9	512.1
Intangible Assets, Accumulated Amortization	(374.4)	(351.3)
Total	182.5	160.8
Distribution Rights And Other Intellectual Property [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	70.5	69.2
Intangible Assets, Accumulated Amortization	(62.4)	(60.7)
Total	$ 8.1	$ 8.5

[1] See Note 2 for a summary of adjustments