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Earnings (Loss) Per Share
 3 Months Ended
Aug. 31, 2017
Earnings Per Share [Abstract]  
Earnings (Loss) Per Share
EARNINGS (LOSS) PER SHARE
 
The following table summarizes the reconciliation of the numerators and denominators for the basic and diluted earnings (loss) per share computation for the periods indicated:
 
Three months ended
 
August 31,
 
August 31,
 
2017
 
2016
Earnings (loss) from continuing operations attributable to Class A and Common Shares
$
(63.7
)
 
$
(39.5
)
Earnings (loss) from discontinued operations attributable to Class A and Common Shares, net of tax
—

 
(0.1
)
Net income (loss) attributable to Class A and Common Shares
$
(63.7
)
 
$
(39.6
)
Weighted average Shares of Class A Stock and Common Stock outstanding for basic earnings (loss) per share (in millions)
35.2

 
34.4

Dilutive effect of Class A Stock and Common Stock potentially issuable pursuant to stock-based compensation plans (in millions)
*

 
*

Adjusted weighted average Shares of Class A Stock and Common Stock outstanding for diluted earnings (loss) per share (in millions)
*

 
*

Earnings (loss) per share of Class A Stock and Common Stock:
 

 
 

Basic earnings (loss) per share:
 

 
 

Earnings (loss) from continuing operations
$
(1.81
)
 
$
(1.15
)
Earnings (loss) from discontinued operations, net of tax
$
—

 
$
(0.00
)
Net income (loss)
$
(1.81
)
 
$
(1.15
)
Diluted earnings (loss) per share:
 

 
 

Earnings (loss) from continuing operations
$
(1.81
)
 
$
(1.15
)
Earnings (loss) from discontinued operations, net of tax
$
—

 
$
(0.00
)
Net income (loss)
$
(1.81
)
 
$
(1.15
)


* In each of the three month periods ended August 31, 2017 and 2016, the Company experienced a loss from continuing operations and therefore did not report any dilutive share impact.

The following table sets forth Options outstanding pursuant to stock-based compensation plans as of the dates indicated: 
 
August 31, 2017
 
August 31, 2016
Options outstanding pursuant to stock-based compensation plans (in millions)
2.6
 
2.8


In a period in which the Company reports a discontinued operation, Earnings (loss) from continuing operations is used as the “control number” in determining whether potentially dilutive common shares are dilutive or anti-dilutive. There were 0.4 million potentially anti-dilutive shares outstanding pursuant to compensation plans as of August 31, 2017.

A portion of the Company’s Restricted Stock Units ("RSUs") which are granted to employees participate in earnings through cumulative dividends payable to the employees upon vesting of the RSUs. Accordingly, the Company measures earnings per share based upon the lower of the Two-class method or the Treasury Stock method. Since, under the Two-class method, losses are not allocated to the participating securities, in periods of loss the Two-class method is not applicable.

As of August 31, 2017, $33.9 remained available for future purchases of common shares under the current repurchase authorization of the Board of Directors (the "Board"). See Note 11, “Treasury Stock,” for a more complete description of the Company’s share buy-back program.