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Discontinued Operations (Tables)
 9 Months Ended
Feb. 28, 2014
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 
 February 28,
 
Nine months ended 
 February 28,
 
2014
 
2013
 
2014
 
2013
Revenues
$
0.0

 
$
1.9

 
$
0.1

 
$
4.8

Earnings (loss) before income taxes
0.0

 
(0.2
)
 
0.3

 
(2.2
)
Income tax benefit (provision)
(0.0
)
 
0.0

 
(0.1
)
 
0.8

Earnings (loss) from discontinued operations, net of tax
$
0.0

 
$
(0.2
)
 
$
0.2

 
$
(1.4
)
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: 
 
February 28,
2014
 
May 31,
2013
 
February 28,
2013
Accounts receivable, net
$
0.0

 
$
0.0

 
$
0.0

Other assets
0.4

 
0.4

 
8.5

Current assets of discontinued operations
$
0.4

 
$
0.4

 
$
8.5

Accrued expenses and other current liabilities
1.1

 
1.3

 
1.7

Current liabilities of discontinued operations
$
1.1

 
$
1.3

 
$
1.7