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Description of the Business, Basis of Presentation and Summary of Significant Accounting Policies (Details)
$ in Millions
9 Months Ended 12 Months Ended
Feb. 28, 2014
USD ($)
May. 31, 2015
USD ($)
segment
May. 31, 2014
USD ($)
May. 31, 2013
USD ($)
tax_jurisdiction
Property, Plant and Equipment [Line Items]        
Number of Countries in which Entity Operates   150    
Restricted cash held in escrow   $ 34.5 $ 0.0  
Capitalized computer software, net (in Dollars)   21.1 33.1  
Capitalized computer software, amortization expense (in Dollars)   17.7 28.5 $ 30.9
Payments to acquire building   $ 0.0 253.9 $ 0.0
Reporting units subject to goodwill impairment | segment   7    
Accrual for taxes other than income taxes (in Dollars)     19.7  
Number of tax jurisdictions | tax_jurisdiction       2
Payments of taxes other than income taxes     15.3  
Settlement   $ 4.3 1.7  
Deferred advertising costs (in Dollars)   $ 4.9 4.6  
Building [Member]        
Property, Plant and Equipment [Line Items]        
Depreciable life   40 years    
Payments to acquire real estate $ 255.7      
Payments to acquire building $ 253.9      
Capitalized Software [Member]        
Property, Plant and Equipment [Line Items]        
Impairment charges   $ 4.6 $ 7.6  
Capitalized Software [Member] | Minimum [Member]        
Property, Plant and Equipment [Line Items]        
Depreciable life   3 years    
Capitalized Software [Member] | Maximum [Member]        
Property, Plant and Equipment [Line Items]        
Depreciable life   7 years    
Furniture and Fixtures [Member]        
Property, Plant and Equipment [Line Items]        
Depreciable life   10 years    
Retail Store [Member]        
Property, Plant and Equipment [Line Items]        
Impairment charges   $ 2.9