Basis of Presentation (Details) (Reclassified From Cost Of Sales To Selling, General And Administrative Expense [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Feb. 28, 2014
Feb. 28, 2014
Reclassified From Cost Of Sales To Selling, General And Administrative Expense [Member]
   
Quantifying Misstatement in Current Year Financial Statements [Line Items]    
Quantifying Misstatement in Current Year Financial Statements, Amount $ 33.4 $ 89.4