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

Basis of Presentation - Narrative (Details) - USD ($) $ in Millions	Mar. 21, 2017	Aug. 31, 2018	May 31, 2018
Business Acquisition [Line Items]
Reserve for obsolete inventory		$ 31.2	$ 37.0
G&K Services
Business Acquisition [Line Items]
Consideration transferred	$ 2,100.0