Reporting Segment And Geographic Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2022	Dec. 31, 2021	Jan. 01, 2021
Segment Reporting Information [Line Items]
Segment revenue	$ 3,676.3	$ 3,659.4	$ 3,152.0
Segment operating income	510.9	561.0	419.8
Segments Revenue
Segment Reporting Information [Line Items]
Segment operating income	964.8	963.2	793.6
Buildings and Infrastructure
Segment Reporting Information [Line Items]
Segment revenue	1,494.0	1,422.7	1,231.0
Buildings and Infrastructure | Segments Revenue
Segment Reporting Information [Line Items]
Segment operating income	406.3	411.7	338.1
Geospatial
Segment Reporting Information [Line Items]
Segment revenue	756.5	828.9	650.5
Geospatial | Segments Revenue
Segment Reporting Information [Line Items]
Segment operating income	221.4	244.1	184.4
Resources and Utilities
Segment Reporting Information [Line Items]
Segment revenue	821.6	771.3	630.0
Resources and Utilities | Segments Revenue
Segment Reporting Information [Line Items]
Segment operating income	278.3	264.0	221.0
Transportation
Segment Reporting Information [Line Items]
Segment revenue	604.2	636.5	640.5
Transportation | Segments Revenue
Segment Reporting Information [Line Items]
Segment operating income	$ 58.8	$ 43.4	$ 50.1