Reporting Segment And Geographic Information (Schedule Of Revenue, Operating Income And Identifiable Assets By Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2023	Dec. 30, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Segment revenue	$ 3,798.7	$ 3,676.3	$ 3,659.4
Segment operating income	448.8	510.9	561.0
Segments Revenue
Segment Reporting Information [Line Items]
Segment revenue	3,798.7	3,676.3	3,659.4
Segment operating income	1,050.7	964.8	963.2
Buildings and Infrastructure
Segment Reporting Information [Line Items]
Segment revenue	1,593.1	1,494.0	1,422.7
Buildings and Infrastructure | Segments Revenue
Segment Reporting Information [Line Items]
Segment revenue		1,494.0	1,422.7
Segment operating income	440.8	406.3	411.7
Geospatial
Segment Reporting Information [Line Items]
Segment revenue	695.5	756.5	828.9
Geospatial | Segments Revenue
Segment Reporting Information [Line Items]
Segment revenue		756.5	828.9
Segment operating income	209.1	221.4	244.1
Resources and Utilities
Segment Reporting Information [Line Items]
Segment revenue	769.1	821.6	771.3
Resources and Utilities | Segments Revenue
Segment Reporting Information [Line Items]
Segment revenue		821.6	771.3
Segment operating income	270.6	278.3	264.0
Transportation
Segment Reporting Information [Line Items]
Segment revenue	741.0	604.2	636.5
Transportation | Segments Revenue
Segment Reporting Information [Line Items]
Segment revenue		604.2	636.5
Segment operating income	$ 130.2	$ 58.8	$ 43.4