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Description of the Business, Basis of Presentation and Summary of Significant Accounting Policies (Details)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
May 31, 2016
USD ($)
segment
Feb. 28, 2014
USD ($)
May 31, 2016
USD ($)
segment
May 31, 2015
USD ($)
May 31, 2014
USD ($)
Property, Plant and Equipment [Line Items]          
Number of countries in which entity operates 150   150    
Restricted cash held in escrow $ 9.9   $ 9.9 $ 34.5  
Impairment charges     14.4 15.8 $ 28.0
Capitalized computer software, net $ 31.1   31.1 21.1  
Capitalized computer software, amortization expense     11.4 17.7 28.5
Payments to acquire building     $ 0.0 0.0 $ 253.9
Reporting units subject to goodwill impairment | segment 7   7    
Settlement       4.3  
Deferred advertising costs $ 6.0   $ 6.0 4.9  
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     5 years    
Furniture and Fixtures [Member]          
Property, Plant and Equipment [Line Items]          
Depreciable life     10 years    
Legacy Building Improvements [Member]          
Property, Plant and Equipment [Line Items]          
Impairment charges $ 7.5        
Legacy Prepublication Costs [Member]          
Property, Plant and Equipment [Line Items]          
Impairment charges     $ 6.9    
Retail Store [Member]          
Property, Plant and Equipment [Line Items]          
Impairment charges     $ 2.9