Reporting Segment And Geographic Information (Segment Revenue by Geography) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2023	Dec. 30, 2022	Dec. 31, 2021
Revenue from External Customer [Line Items]
Segment revenue	$ 3,798.7	$ 3,676.3	$ 3,659.4
Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	3,798.7	3,676.3	3,659.4
Buildings and Infrastructure
Revenue from External Customer [Line Items]
Segment revenue	1,593.1	1,494.0	1,422.7
Buildings and Infrastructure | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue		1,494.0	1,422.7
Geospatial
Revenue from External Customer [Line Items]
Segment revenue	695.5	756.5	828.9
Geospatial | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue		756.5	828.9
Resources and Utilities
Revenue from External Customer [Line Items]
Segment revenue	769.1	821.6	771.3
Resources and Utilities | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue		821.6	771.3
Transportation
Revenue from External Customer [Line Items]
Segment revenue	741.0	604.2	636.5
Transportation | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue		604.2	636.5
North America | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	2,018.5	1,955.2	1,866.1
North America | Buildings and Infrastructure | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	1,026.0	938.1	823.5
North America | Geospatial | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	300.2	320.7	337.3
North America | Resources and Utilities | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	217.5	227.0	212.2
North America | Transportation | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	474.8	469.4	493.1
Europe | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	1,076.2	1,037.9	1,124.6
Europe | Buildings and Infrastructure | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	338.1	337.1	386.6
Europe | Geospatial | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	213.3	247.8	282.3
Europe | Resources and Utilities | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	328.9	374.3	368.4
Europe | Transportation | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	195.9	78.7	87.3
Asia Pacific | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	428.9	415.1	447.3
Asia Pacific | Buildings and Infrastructure | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	196.6	192.8	188.4
Asia Pacific | Geospatial | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	141.9	140.3	161.4
Asia Pacific | Resources and Utilities | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	56.9	51.7	67.3
Asia Pacific | Transportation | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	33.5	30.3	30.2
Rest of World | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	275.1	268.1	221.4
Rest of World | Buildings and Infrastructure | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	32.4	26.0	24.2
Rest of World | Geospatial | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	40.1	47.7	47.9
Rest of World | Resources and Utilities | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	165.8	168.6	123.4
Rest of World | Transportation | Segments Revenue
Revenue from External Customer [Line Items]
Segment revenue	$ 36.8	$ 25.8	$ 25.9