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Income Taxes and Other Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Feb. 28, 2014
Feb. 28, 2014
Income Tax Disclosure [Abstract]    
Effective Income Tax Rate, Annualized, Percent   39.20%
Effective Income Tax Rate Reconciliation, Percent 70.40% (312.80%)
Effective Income Tax Rate Reconciliation, Tax Settlement, Domestic, Amount $ 13.8