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Discontinued Operations - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
May. 29, 2015
Feb. 29, 2016
Feb. 29, 2016
Feb. 28, 2015
May. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Working capital adjustment   $ 2.9 $ 2.9 $ 0.0  
Consideration released from escrow     $ (17.2) $ 0.0  
Discontinued Operations | Ed Tech          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Consideration received $ 577.7        
Consideration deposited in escrow 34.5        
Working capital adjustment $ 2.7        
Consideration released from escrow   $ 17.2      
Accrued selling expenses         $ 12.2