Business Combinations (Schedule Of Changes In Carrying Amount Of Goodwill) (Details) $ in Millions	12 Months Ended
	Dec. 29, 2017 USD ($)
Goodwill [Line Items]
Beginning Balance	$ 2,077.6
Additions due to acquisitions and current year acquisitions' purchase price adjustments	140.6
Purchase price adjustments - prior years' acquisitions	(0.1)
Foreign currency translation adjustments	75.9
Divestitures (1)	(6.9)	[1]
Ending Balance	2,287.1
Building and Infrastructure [Member]
Goodwill [Line Items]
Beginning Balance	663.7
Additions due to acquisitions and current year acquisitions' purchase price adjustments	2.5
Purchase price adjustments - prior years' acquisitions	(0.1)
Foreign currency translation adjustments	40.7
Divestitures (1)	0.0	[1]
Ending Balance	706.8
Geospatial [Member]
Goodwill [Line Items]
Beginning Balance	405.1
Additions due to acquisitions and current year acquisitions' purchase price adjustments	0.0
Purchase price adjustments - prior years' acquisitions	0.0
Foreign currency translation adjustments	17.1
Divestitures (1)	(6.9)	[1]
Ending Balance	415.3
Resources and Utilities [Member]
Goodwill [Line Items]
Beginning Balance	217.7
Additions due to acquisitions and current year acquisitions' purchase price adjustments	86.3
Purchase price adjustments - prior years' acquisitions	0.0
Foreign currency translation adjustments	10.5
Divestitures (1)	0.0	[1]
Ending Balance	314.5
Transportation [Member]
Goodwill [Line Items]
Beginning Balance	791.1
Additions due to acquisitions and current year acquisitions' purchase price adjustments	51.8
Purchase price adjustments - prior years' acquisitions	0.0
Foreign currency translation adjustments	7.6
Divestitures (1)	0.0	[1]
Ending Balance	$ 850.5

[1] In the first quarter of 2017, the Company sold its ThingMagic business, which was part of the Geospatial segment