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Acquisitions - Narrative (Detail) - USD ($) $ in Millions				3 Months Ended
	Feb. 26, 2021	Sep. 28, 2020	Jan. 31, 2020	Apr. 03, 2021	Mar. 28, 2020	Jan. 02, 2021	Jun. 27, 2020
Business Acquisition [Line Items]
Payment to acquire business, net of cash acquired				$ 200.0	$ 6.1
Goodwill				1,161.8		$ 982.4
Dealer-FX
Business Acquisition [Line Items]
Cash purchase price of acquisition	$ 200.1
Payment to acquire business, net of cash acquired	$ 200.0
Goodwill				195.2
AutoCrib
Business Acquisition [Line Items]
Cash purchase price of acquisition		$ 35.4
Goodwill				$ 18.3
Sigmavision
Business Acquisition [Line Items]
Cash purchase price of acquisition			$ 5.9
Goodwill							$ 5.6

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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.

+ 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))
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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