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Earnings (Loss) Per Share
 9 Months Ended
Feb. 29, 2016
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 three month and nine month periods ended February 29, 2016 and February 28, 2015, respectively:
 
Three months ended
 
Nine months ended
 
February 29,
 
February 28,
 
February 29,
 
February 28,
 
2016
 
2015
 
2016
 
2015
Earnings (loss) from continuing operations attributable to Class A and Common Shares
$
(7.2
)
 
$
(15.7
)
 
$
9.1

 
$
(2.0
)
Earnings (loss) from discontinued operations attributable to Class A and Common Shares, net of tax
(1.8
)
 
(6.4
)
 
(2.6
)
 
14.3

Net income (loss) attributable to Class A and Common Shares
$
(9.0
)
 
$
(22.1
)
 
$
6.5

 
$
12.3

Weighted average Shares of Class A Stock and Common Stock outstanding for basic earnings (loss) per share (in millions)
34.3

 
32.7

 
34.0

 
32.6

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

 
—

 
0.9

 
0.6

Adjusted weighted average Shares of Class A Stock and Common Stock outstanding for diluted earnings (loss) per share (in millions)
34.3

 
32.7

 
34.9

 
33.2

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

 
 

 
 

 
 

Basic earnings (loss) per share:
 

 
 

 
 

 
 

Earnings (loss) from continuing operations
$
(0.21
)
 
$
(0.48
)
 
$
0.27

 
$
(0.06
)
Earnings (loss) from discontinued operations, net of tax
$
(0.05
)
 
$
(0.20
)
 
$
(0.08
)
 
$
0.44

Net income (loss)
$
(0.26
)
 
$
(0.68
)
 
$
0.19

 
$
0.38

Diluted earnings (loss) per share:
 

 
 

 
 

 
 

Earnings (loss) from continuing operations
$
(0.21
)
 
$
(0.48
)
 
$
0.26

 
$
(0.06
)
Earnings (loss) from discontinued operations, net of tax
$
(0.05
)
 
$
(0.20
)
 
$
(0.07
)
 
$
0.43

Net income (loss)
$
(0.26
)
 
$
(0.68
)
 
$
0.19

 
$
0.37



The following table sets forth Options outstanding pursuant to stock-based compensation plans as of the dates indicated: 
 
February 29, 2016
 
February 28, 2015
Options outstanding pursuant to stock-based compensation plans (in millions)
3.4
 
4.4


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. Potentially dilutive shares outstanding pursuant to compensation plans that were not included in the diluted earnings per share calculation because they were anti-dilutive were 0.4 million as of February 29, 2016.

A portion of the Company’s RSUs which are granted to employees participate in earnings through cumulative non-forfeitable 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 February 29, 2016, $52.9 remained available for future purchases of common shares under the current repurchase authorization of the Board of Directors (the "Board"). See Note 12, “Treasury Stock,” for a more complete description of the Company’s share buy-back program.