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Earnings Per Share (Tables)
 3 Months Ended
Mar. 28, 2015
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings Per Share
The following table sets forth the computation of basic and diluted earnings per share.
 
12 Weeks Ended
(In millions, except share and per share data)
March 28,
2015
 
March 22,
2014
Numerator:
 
 
 
Net earnings attributable to Wolverine World Wide, Inc.
$
40.1

 
$
37.1

Adjustment for earnings allocated to non-vested restricted common stock
(0.8
)
 
(0.7
)
Net earnings used in calculating basic earnings per share
39.3

 
36.4

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

 
—

Net earnings used in calculating diluted earnings per share
$
39.4

 
$
36.4

Denominator:
 
 
 
Weighted average shares outstanding
102,514,698

 
100,961,065

Adjustment for non-vested restricted common stock
(3,550,261
)
 
(3,141,330
)
Shares used in calculating basic earnings per share
98,964,437

 
97,819,735

Effect of dilutive stock options
1,871,886

 
2,056,789

Shares used in calculating diluted earnings per share
100,836,323

 
99,876,524

Net earnings per share:
 
 
 
Basic
$
0.40

 
$
0.37

Diluted
$
0.39

 
$
0.36