Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details)

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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
May 31, 2014
May 31, 2013
Deferred tax assets:    
Compensation and employee benefit liabilities $ 18.7 $ 16.3
Other current liabilities 6.9 6.3
Tax credit carry forward 38.3 35.3
Depreciation 8.3 8.5
Stock-based compensation 21.1 24.6
Other 15.4 16.6
Gross deferred tax assets 108.7 107.6
Deferred tax liabilities:    
Capitalized software 50.1 45.8
Depreciation 12.2 20.2
Goodwill and Intangible assets 46.7 41.0
Revenue not subject to current taxes 12.6 11.7
Unrealized gains on available-for-sale securities 13.2 13.3
Other 0.4 0.6
Gross deferred tax liabilities 135.2 132.6
Net deferred tax liability $ (26.5) $ (25.0)