Segment Information - Segment Revenue by Geographic Areas (Details) - Operating Segments [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018
Segment Reporting Information [Line Items]
Segment Revenues	$ 784.3	$ 804.7	$ 2,444.6	$ 2,339.1
North America [Member]
Segment Reporting Information [Line Items]
Segment Revenues	437.7	451.4	1,345.4	1,251.5
Europe [Member]
Segment Reporting Information [Line Items]
Segment Revenues	205.5	203.5	691.0	653.5
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Segment Revenues	91.4	110.8	274.8	312.7
Rest of World [Member]
Segment Reporting Information [Line Items]
Segment Revenues	49.7	39.0	133.4	121.4
Buildings and Infrastructure [Member]
Segment Reporting Information [Line Items]
Segment Revenues	309.8	295.8	944.4	800.7
Buildings and Infrastructure [Member] | North America [Member]
Segment Reporting Information [Line Items]
Segment Revenues	180.9	167.8	545.7	433.2
Buildings and Infrastructure [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Segment Revenues	79.9	77.7	253.8	236.9
Buildings and Infrastructure [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Segment Revenues	41.3	45.0	121.9	111.6
Buildings and Infrastructure [Member] | Rest of World [Member]
Segment Reporting Information [Line Items]
Segment Revenues	7.7	5.3	23.0	19.0
Geospatial [Member]
Segment Reporting Information [Line Items]
Segment Revenues	155.1	185.4	480.7	544.3
Geospatial [Member] | North America [Member]
Segment Reporting Information [Line Items]
Segment Revenues	63.4	83.4	197.6	223.0
Geospatial [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Segment Revenues	49.5	48.8	160.2	154.6
Geospatial [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Segment Revenues	30.4	42.2	88.3	130.4
Geospatial [Member] | Rest of World [Member]
Segment Reporting Information [Line Items]
Segment Revenues	11.8	11.0	34.6	36.3
Resources and Utilities [Member]
Segment Reporting Information [Line Items]
Segment Revenues	121.1	133.2	433.3	438.0
Resources and Utilities [Member] | North America [Member]
Segment Reporting Information [Line Items]
Segment Revenues	35.9	43.5	130.7	140.3
Resources and Utilities [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Segment Revenues	54.2	55.3	211.1	197.6
Resources and Utilities [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Segment Revenues	10.4	12.1	35.0	35.7
Resources and Utilities [Member] | Rest of World [Member]
Segment Reporting Information [Line Items]
Segment Revenues	20.6	22.3	56.5	64.4
Transportation [Member]
Segment Reporting Information [Line Items]
Segment Revenues	198.3	190.3	586.2	556.1
Transportation [Member] | North America [Member]
Segment Reporting Information [Line Items]
Segment Revenues	157.5	156.7	471.4	455.0
Transportation [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Segment Revenues	21.9	21.7	65.9	64.4
Transportation [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Segment Revenues	9.3	11.5	29.6	35.0
Transportation [Member] | Rest of World [Member]
Segment Reporting Information [Line Items]
Segment Revenues	$ 9.6	$ 0.4	$ 19.3	$ 1.7