Intangible Assets and Goodwill (Changes In Carrying Amount Of Goodwill By Operating Segment) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Goodwill [Roll Forward]
Balance as of year end 2021	$ 3,981.5
Additions due to acquisitions	214.6
Decrease from divestitures	(37.7)
Foreign currency translation and other adjustments	(121.3)
Balance as of the end of the third quarter of 2022	4,037.1
Buildings and Infrastructure
Goodwill [Roll Forward]
Balance as of year end 2021	2,141.4
Additions due to acquisitions	214.6
Decrease from divestitures	(23.9)
Foreign currency translation and other adjustments	(67.8)
Balance as of the end of the third quarter of 2022	2,264.3
Geospatial
Goodwill [Roll Forward]
Balance as of year end 2021	403.6
Additions due to acquisitions	0.0
Decrease from divestitures	(6.9)
Foreign currency translation and other adjustments	(23.3)
Balance as of the end of the third quarter of 2022	373.4
Resources and Utilities
Goodwill [Roll Forward]
Balance as of year end 2021	440.8
Additions due to acquisitions	0.0
Decrease from divestitures	0.0
Foreign currency translation and other adjustments	(20.1)
Balance as of the end of the third quarter of 2022	420.7
Transportation
Goodwill [Roll Forward]
Balance as of year end 2021	995.7
Additions due to acquisitions	0.0
Decrease from divestitures	(6.9)
Foreign currency translation and other adjustments	(10.1)
Balance as of the end of the third quarter of 2022	$ 978.7