Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment, Net of Accumulated Depreciation (Details)

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Property and Equipment, Net of Accumulated Depreciation (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Aug. 31, 2013
Aug. 31, 2012
May 31, 2013
Components of property and equipment, at cost      
Land and improvements $ 8.1   $ 8.1
Buildings and improvements 100.3   99.2
Data processing equipment 182.4   175.6
Software 300.9   290.1
Furniture, fixtures, and equipment 144.6   145.2
Leasehold improvements 100.6   99.5
Construction in progress 35.9   32.8
Total property and equipment, gross 872.8   850.5
Less: Accumulated depreciation and amortization 522.3   504.5
Property and equipment, net of accumulated depreciation 350.5   346.0
Property and Equipment, Net of Accumulated Depreciation (Textual)      
Depreciation expense $ 20.7 $ 19.4