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Acquisitions - Narrative (Detail) - USD ($) $ in Millions |  |  |  |  | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 31, 2020 | Aug. 07, 2019 | Apr. 02, 2019 | Jan. 25, 2019 | Jun. 27, 2020 | Jun. 29, 2019 | Dec. 28, 2019 | Sep. 28, 2019
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 924.5 |  | $ 913.8 |
Payment to acquire business, net of cash acquired |  |  |  |  | 6.1 | $ 9.3 |  |
Sigmavision |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Cash purchase price of acquisition | $ 5.9 |  |  |  |  |  |  |
Goodwill |  |  |  |  | 5.6 |  |  |
Cognitran Limited |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Cash purchase price of acquisition |  | $ 30.6 |  |  |  |  |  |
Goodwill |  |  |  |  | $ 14.5 |  |  |
Payment to acquire business, net of cash acquired |  | $ 29.6 |  |  |  |  |  |
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 |  |  |  |

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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