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Acquisitions - Narrative (Detail) - USD ($) $ in Millions					9 Months Ended
	Aug. 07, 2019	Apr. 02, 2019	Jan. 25, 2019	Jan. 31, 2018	Sep. 28, 2019	Sep. 29, 2018	Dec. 29, 2018
Business Acquisition [Line Items]
Payment to acquire business, net of cash acquired					$ 38.9	$ 3.0
Goodwill					920.1		$ 902.2
Cognitran Limited
Business Acquisition [Line Items]
Cash purchase price of acquisition	$ 30.7
Payment to acquire business, net of cash acquired	$ 29.7
Goodwill					27.7
Power Hawk Technologies Inc
Business Acquisition [Line Items]
Cash purchase price of acquisition		$ 7.9
Goodwill					6.4
TMB GeoMarketing Limited
Business Acquisition [Line Items]
Cash purchase price of acquisition			$ 1.3
Goodwill					$ 1.3
George A. Sturdevant, Inc. (d/b/a Fastorq)
Business Acquisition [Line Items]
Cash purchase price of acquisition				$ 3.0
Goodwill							$ 2.6

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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