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 9 Months Ended
Feb. 28, 2014
Feb. 28, 2013
Feb. 28, 2014
Feb. 28, 2013
May 31, 2013
Components of property and equipment, at cost          
Land and improvements $ 8.1   $ 8.1   $ 8.1
Buildings and improvements 100.8   100.8   99.2
Data processing equipment 179.4   179.4   175.6
Software 340.5   340.5   290.1
Furniture, fixtures, and equipment 146.1   146.1   145.2
Leasehold improvements 101.0   101.0   99.5
Construction in progress 13.9   13.9   32.8
Total property and equipment, gross 889.8   889.8   850.5
Less: Accumulated depreciation and amortization 544.7   544.7   504.5
Property and equipment, net of accumulated depreciation 345.1   345.1   346.0
Property and Equipment, Net of Accumulated Depreciation (Textual)          
Depreciation expense $ 22.1 $ 20.1 $ 65.0 $ 59.0