Annual report pursuant to Section 13 and 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
12 Months Ended
May. 31, 2015
May. 31, 2014
May. 31, 2013
Components of property and equipment, at cost      
Land and improvements $ 8.3 $ 8.1  
Buildings and improvements 102.1 101.1  
Data processing equipment 190.9 180.8  
Software 391.8 344.8  
Furniture, fixtures, and equipment 145.6 145.0  
Leasehold improvements 106.2 101.7  
Construction in progress 28.5 25.3  
Total property and equipment, gross 973.4 906.8  
Less: Accumulated depreciation 619.5 564.6  
Property and equipment, net of accumulated depreciation 353.9 342.2  
Property and Equipment, Net of Accumulated Depreciation (Textual)      
Depreciation expense $ 92.1 $ 89.1 $ 79.2