Business Combinations (Schedule Of Intangible Assets) (Detail) - USD ($) $ in Millions	Apr. 03, 2020	Jan. 03, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	$ 2,213.0	$ 2,191.0
Intangible Assets, Accumulated Amortization	(1,531.8)	(1,512.3)
Total	681.2	678.7
Developed Product Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	1,298.1	1,266.7
Intangible Assets, Accumulated Amortization	(934.0)	(923.4)
Total	364.1	343.3
Trade Names And Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	75.7	74.8
Intangible Assets, Accumulated Amortization	(62.0)	(59.8)
Total	13.7	15.0
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	767.6	769.8
Intangible Assets, Accumulated Amortization	(472.7)	(465.6)
Total	294.9	304.2
Distribution Rights And Other Intellectual Property [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross Carrying Amount	71.6	79.7
Intangible Assets, Accumulated Amortization	(63.1)	(63.5)
Total	$ 8.5	$ 16.2