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Discontinued Operations (Tables)
6 Months Ended
Nov. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]  
Schedule Of Discontinued Operation Gain Loss On Disposal Of Discontinued Operation [Table Text Block] The following table summarizes the operating results of the discontinued operations for the periods indicated:

    Three months ended November 30,     Six months ended November 30,  
    2013     2012     2013     2012  
                         
Revenues   $ 0.1     $ 2.7     $ 0.1     $ 2.9  
Earnings (loss) before income taxes     0.0       (1.3 )     0.3       (1.9 )
Income tax benefit (provision)     (0.0 )     0.5       (0.1 )     0.7  
Earnings (loss) from discontinued operations, net of tax   $ 0.0     $ (0.8 )   $ 0.2     $ (1.2 )
Schedule Of Disposal Groups Including Discontinued Operations Balance Sheet [Table Text Block] The following table sets forth the assets and liabilities of the discontinued operations included in the condensed consolidated balance sheets of the Company as of the dates indicated:

    November 30, 2013     May 31, 2013     November 30, 2012  
Accounts receivable, net   $ 0.0     $ 0.0     $ 0.0  
Other assets     0.4       0.4       8.3  
                         
Current assets of discontinued operations   $ 0.4     $ 0.4     $ 8.3  
                         
Accrued expenses and other current liabilities     1.2       1.3       2.0  
                         
Current liabilities of discontinued operations   $ 1.2     $ 1.3     $ 2.0