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Earnings Per Share
 9 Months Ended
Sep. 07, 2013
Earnings Per Share [Abstract]  
Earnings Per Share
EARNINGS PER SHARE
The Company calculates earnings per share in accordance with FASB Accounting Standards Codification (“ASC”) Topic 260, Earnings Per Share (“ASC 260”). ASC 260 addresses whether instruments granted in share-based payment transactions are participating securities prior to vesting, and, therefore, need to be included in the earnings allocation in computing earnings per share under the two-class method. Under the guidance in ASC 260, the Company’s unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents, whether paid or unpaid, are participating securities and must be included in the computation of earnings per share pursuant to the two-class method.
On July 11, 2013, the Company’s Board of Directors approved a two-for-one stock split in the form of a 100 percent stock dividend payable on November 1, 2013 to stockholders of record on October 1, 2013. The earnings per share calculation has been adjusted for all periods presented to reflect the stock split. The following table sets forth the computation of basic and diluted earnings per share:
(In millions, except share and per share data)
12 Weeks Ended
 
36 Weeks Ended
 
September 7,
2013
 
September 8,
2012
 
September 7,
2013
 
September 8,
2012
Numerator:
 
 
 
 
 
 
 
Net earnings attributable to Wolverine World Wide, Inc.
$
54.4

 
$
32.7

 
$
102.1

 
$
84.4

Adjustment for earnings allocated to non-vested restricted common stock
(1.1
)
 
(0.5
)
 
(2.0
)
 
(1.5
)
Net earnings used in calculating basic earnings per share
53.3

 
32.2

 
100.1

 
82.9

Adjustment for earnings reallocated from non-vested restricted common stock
0.1

 
—

 
0.1

 
0.1

Net earnings used in calculating diluted earnings per share
$
53.4

 
$
32.2

 
$
100.2

 
$
83.0

Denominator:
 
 
 
 
 
 
 
Weighted average shares outstanding
100,474,793

 
97,743,844

 
100,087,863

 
97,333,545

Adjustment for non-vested restricted common stock
(3,391,901)

 
(2,758,969)

 
(3,280,184)

 
(2,784,802)

Shares used in calculating basic earnings per share
97,082,892

 
94,984,875

 
96,807,679

 
94,548,743

Effect of dilutive stock options
2,121,186

 
2,244,358

 
1,852,797

 
2,252,554

Shares used in calculating diluted earnings per share
99,204,078

 
97,229,233

 
98,660,476

 
96,801,297

Net earnings per share:
 
 
 
 
 
 
 
Basic
$
0.55

 
$
0.34

 
$
1.03

 
$
0.88

Diluted
$
0.54

 
$
0.33

 
$
1.02

 
$
0.86


For the 12 and 36 weeks ended September 7, 2013, options relating to 36,849 and 687,888 shares of common stock outstanding, respectively, have not been included in the denominator for the computation of diluted earnings per share because they were anti-dilutive.
For the 12 and 36 weeks ended September 8, 2012, options relating to 526,890 and 1,053,596 shares of common stock outstanding, respectively, have not been included in the denominator for the computation of diluted earnings per share because they were anti-dilutive.