Inventories - Narrative (Details) - USD ($) $ in Millions	Dec. 29, 2019	Dec. 30, 2018
Inventory Disclosure [Abstract]
Inventory valuation reserves	$ 28.3	$ 28.1

Amount of valuation reserve for inventory.

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Name:	us-gaap_InventoryValuationReserves
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant