Business Combinations (Changes In Carrying Amount Of Goodwill By Operating Segment) (Detail) $ in Millions	3 Months Ended
	Apr. 02, 2021 USD ($)
Goodwill [Roll Forward]
Balance as of fiscal year end 2020	$ 3,876.5
Foreign currency translation and other adjustments	(28.5)
Balance as of the end of the first quarter of fiscal 2021	3,848.0
Buildings and Infrastructure
Goodwill [Roll Forward]
Balance as of fiscal year end 2020	1,997.4
Foreign currency translation and other adjustments	(5.0)
Balance as of the end of the first quarter of fiscal 2021	1,992.4
Geospatial
Goodwill [Roll Forward]
Balance as of fiscal year end 2020	415.7
Foreign currency translation and other adjustments	(6.9)
Balance as of the end of the first quarter of fiscal 2021	408.8
Resources and Utilities
Goodwill [Roll Forward]
Balance as of fiscal year end 2020	453.8
Foreign currency translation and other adjustments	(4.6)
Balance as of the end of the first quarter of fiscal 2021	449.2
Transportation
Goodwill [Roll Forward]
Balance as of fiscal year end 2020	1,009.6
Foreign currency translation and other adjustments	(12.0)
Balance as of the end of the first quarter of fiscal 2021	$ 997.6