Intangible Assets and Goodwill (Changes In Carrying Amount Of Goodwill By Operating Segment) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Goodwill [Roll Forward]
Balance as of year end 2022	$ 4,137.9
Additions due to acquisitions	22.5
Foreign currency translation and other adjustments	16.2
Balance as of the end of the first quarter of 2023	4,176.6
Buildings and Infrastructure
Goodwill [Roll Forward]
Balance as of year end 2022	2,300.1
Additions due to acquisitions	22.5
Foreign currency translation and other adjustments	6.6
Balance as of the end of the first quarter of 2023	2,329.2
Geospatial
Goodwill [Roll Forward]
Balance as of year end 2022	382.1
Additions due to acquisitions	0.0
Foreign currency translation and other adjustments	2.2
Balance as of the end of the first quarter of 2023	384.3
Resources and Utilities
Goodwill [Roll Forward]
Balance as of year end 2022	471.8
Additions due to acquisitions	0.0
Foreign currency translation and other adjustments	6.2
Balance as of the end of the first quarter of 2023	478.0
Transportation
Goodwill [Roll Forward]
Balance as of year end 2022	983.9
Additions due to acquisitions	0.0
Foreign currency translation and other adjustments	1.2
Balance as of the end of the first quarter of 2023	$ 985.1