Segment Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Apr. 01, 2022
Segment Reporting Information [Line Items]
Segment operating income	$ 137.0	$ 156.9
Operating segment
Segment Reporting Information [Line Items]
Segment revenue	915.4	993.7
Segment operating income	253.1	262.9
Buildings and Infrastructure | Operating segment
Segment Reporting Information [Line Items]
Segment revenue	399.5	397.6
Segment operating income	113.3	120.7
Geospatial | Operating segment
Segment Reporting Information [Line Items]
Segment revenue	152.4	207.5
Segment operating income	37.3	57.9
Resources and Utilities | Operating segment
Segment Reporting Information [Line Items]
Segment revenue	208.6	229.9
Segment operating income	79.1	75.1
Transportation | Operating segment
Segment Reporting Information [Line Items]
Segment revenue	154.9	158.7
Segment operating income	$ 23.4	$ 9.2