Segment Information - Segment Revenue by Geographic Areas (Details) - Operating Segments [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Segment Reporting Information [Line Items]
Segment Revenues	$ 855.8	$ 789.3	$ 1,660.3	$ 1,534.4
North America [Member]
Segment Reporting Information [Line Items]
Segment Revenues	485.3	415.2	907.7	800.1
Europe [Member]
Segment Reporting Information [Line Items]
Segment Revenues	236.9	223.2	485.5	450.0
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Segment Revenues	90.0	107.4	183.4	201.9
Rest of World [Member]
Segment Reporting Information [Line Items]
Segment Revenues	43.6	43.5	83.7	82.4
Buildings and Infrastructure [Member]
Segment Reporting Information [Line Items]
Segment Revenues	339.9	277.7	634.6	504.9
Buildings and Infrastructure [Member] | North America [Member]
Segment Reporting Information [Line Items]
Segment Revenues	199.2	149.4	364.8	265.3
Buildings and Infrastructure [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Segment Revenues	90.0	83.6	173.9	159.2
Buildings and Infrastructure [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Segment Revenues	42.1	37.4	80.6	66.6
Buildings and Infrastructure [Member] | Rest of World [Member]
Segment Reporting Information [Line Items]
Segment Revenues	8.6	7.3	15.3	13.8
Geospatial [Member]
Segment Reporting Information [Line Items]
Segment Revenues	164.4	184.4	325.6	358.9
Geospatial [Member] | North America [Member]
Segment Reporting Information [Line Items]
Segment Revenues	71.3	70.2	134.2	139.6
Geospatial [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Segment Revenues	56.0	56.2	110.7	105.8
Geospatial [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Segment Revenues	26.2	45.0	57.9	88.3
Geospatial [Member] | Rest of World [Member]
Segment Reporting Information [Line Items]
Segment Revenues	10.9	13.0	22.8	25.2
Resources and Utilities [Member]
Segment Reporting Information [Line Items]
Segment Revenues	152.7	145.3	312.2	304.8
Resources and Utilities [Member] | North America [Member]
Segment Reporting Information [Line Items]
Segment Revenues	52.9	48.5	94.8	96.9
Resources and Utilities [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Segment Revenues	68.0	62.2	156.9	142.4
Resources and Utilities [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Segment Revenues	11.9	12.3	24.6	23.5
Resources and Utilities [Member] | Rest of World [Member]
Segment Reporting Information [Line Items]
Segment Revenues	19.9	22.3	35.9	42.0
Transportation [Member]
Segment Reporting Information [Line Items]
Segment Revenues	198.8	181.9	387.9	365.8
Transportation [Member] | North America [Member]
Segment Reporting Information [Line Items]
Segment Revenues	161.9	147.1	313.9	298.3
Transportation [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Segment Revenues	22.9	21.2	44.0	42.6
Transportation [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Segment Revenues	9.8	12.7	20.3	23.5
Transportation [Member] | Rest of World [Member]
Segment Reporting Information [Line Items]
Segment Revenues	$ 4.2	$ 0.9	$ 9.7	$ 1.4