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Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 31, 2013 segment
Significant Accounting Policies [Line Items]
Number of operating segments (segment)	4
Restricted cash	$ 28.5
Uniforms in service [Member]
Significant Accounting Policies [Line Items]
Inventories useful life, maximum (months)	18 months
Other rental items [Member]
Significant Accounting Policies [Line Items]
Inventories useful life, minimum (months)	8 months
Inventories useful life, maximum (months)	60 months
Minimum [Member] \| Service contacts and other assets [Member]
Significant Accounting Policies [Line Items]
Service contracts and other assets useful lives (years)	5 years
Maximum [Member] \| Service contacts and other assets [Member]
Significant Accounting Policies [Line Items]
Service contracts and other assets useful lives (years)	10 years

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

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