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Summary of Accounting Policies - Narrative (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Revenue, Major Customer [Line Items]
Revenue, performance obligation, description of timing			These contracts are generally for 12 months but can be for a term up to 60 months.
Revenue from contracts with customers	$ 892.7		$ 2,772.3
Transferred at Point in Time | Ship and Bill Performance Obligations | Sales Revenue, Net
Revenue, Major Customer [Line Items]
Concentration risk, percentage			90.00%
Franchise
Revenue, Major Customer [Line Items]
Revenue from contracts with customers	$ 3.9	$ 4.3	$ 12.0	$ 11.2

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