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
3 Months Ended
Aug. 31, 2011
Aug. 31, 2010
May 31, 2011
Components of property and equipment, at cost      
Land and improvements $ 7.0   $ 7.0
Buildings and improvements 95.3   95.2
Data processing equipment 211.2   204.6
Software 239.1   231.2
Furniture, fixtures, and equipment 152.7   152.0
Leasehold improvements 94.6   93.3
Construction in progress 22.5   20.9
Total property and equipment, gross 822.4   804.2
Less: Accumulated depreciation and amortization 511.9   495.5
Property and equipment, net of accumulated depreciation 310.5   308.7
Property and Equipment, Net of Accumulated Depreciation (Textuals) [Abstract]      
Depreciation expense $ 18.5 $ 16.2