Segment Information - Segment Revenue by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Jun. 28, 2019
Segment Reporting Information [Line Items]
Revenue	$ 735.2	$ 855.8	$ 1,529.2	$ 1,660.3
North America
Segment Reporting Information [Line Items]
Revenue	402.1	485.3	816.5	907.7
Europe
Segment Reporting Information [Line Items]
Revenue	207.1	236.9	448.9	485.5
Asia Pacific
Segment Reporting Information [Line Items]
Revenue	90.8	90.0	184.6	183.4
Rest of World
Segment Reporting Information [Line Items]
Revenue	35.2	43.6	79.2	83.7
United States
Segment Reporting Information [Line Items]
Revenue	368.7	435.6	747.5	824.7
Buildings and Infrastructure
Segment Reporting Information [Line Items]
Revenue	295.3	339.9	592.2	634.6
Buildings and Infrastructure | North America
Segment Reporting Information [Line Items]
Revenue	175.6	199.2	347.7	364.8
Buildings and Infrastructure | Europe
Segment Reporting Information [Line Items]
Revenue	78.0	90.0	159.6	173.9
Buildings and Infrastructure | Asia Pacific
Segment Reporting Information [Line Items]
Revenue	36.4	42.1	73.5	80.6
Buildings and Infrastructure | Rest of World
Segment Reporting Information [Line Items]
Revenue	5.3	8.6	11.4	15.3
Geospatial
Segment Reporting Information [Line Items]
Revenue	145.2	164.4	291.4	325.6
Geospatial | North America
Segment Reporting Information [Line Items]
Revenue	57.7	71.3	114.5	134.2
Geospatial | Europe
Segment Reporting Information [Line Items]
Revenue	45.1	56.0	95.8	110.7
Geospatial | Asia Pacific
Segment Reporting Information [Line Items]
Revenue	33.4	26.2	62.1	57.9
Geospatial | Rest of World
Segment Reporting Information [Line Items]
Revenue	9.0	10.9	19.0	22.8
Resources and Utilities
Segment Reporting Information [Line Items]
Revenue	143.8	152.7	324.1	312.2
Resources and Utilities | North America
Segment Reporting Information [Line Items]
Revenue	51.8	52.9	105.5	94.8
Resources and Utilities | Europe
Segment Reporting Information [Line Items]
Revenue	63.3	68.0	153.7	156.9
Resources and Utilities | Asia Pacific
Segment Reporting Information [Line Items]
Revenue	14.0	11.9	31.5	24.6
Resources and Utilities | Rest of World
Segment Reporting Information [Line Items]
Revenue	14.7	19.9	33.4	35.9
Transportation
Segment Reporting Information [Line Items]
Revenue	150.9	198.8	321.5	387.9
Transportation | North America
Segment Reporting Information [Line Items]
Revenue	117.0	161.9	248.8	313.9
Transportation | Europe
Segment Reporting Information [Line Items]
Revenue	20.7	22.9	39.8	44.0
Transportation | Asia Pacific
Segment Reporting Information [Line Items]
Revenue	7.0	9.8	17.5	20.3
Transportation | Rest of World
Segment Reporting Information [Line Items]
Revenue	$ 6.2	$ 4.2	$ 15.4	$ 9.7