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Earnings Per Share (Tables)
 8 Months Ended
Sep. 12, 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
 
36 Weeks Ended
(In millions, except per share data)
September 12,
2015
 
September 6,
2014
 
September 12,
2015
 
September 6,
2014
Numerator:
 
 
 
 
 
 
 
Net earnings attributable to Wolverine World Wide, Inc.
$
45.8

 
$
57.8

 
$
111.2

 
$
122.4

Adjustment for earnings allocated to non-vested restricted common stock
(0.8
)
 
(1.1
)
 
(2.0
)
 
(2.3
)
Net earnings used in calculating basic earnings per share
45.0

 
56.7

 
109.2

 
120.1

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

 
—

 
0.1

 
0.1

Net earnings used in calculating diluted earnings per share
$
45.0

 
$
56.7

 
$
109.3

 
$
120.2

Denominator:
 
 
 
 
 
 
 
Weighted average shares outstanding
103.0

 
101.6

 
102.9

 
101.3

Adjustment for non-vested restricted common stock
(3.3
)
 
(3.3
)
 
(3.4)

 
(3.2)

Shares used in calculating basic earnings per share
99.7

 
98.3

 
99.5

 
98.1

Effect of dilutive stock options
1.6

 
1.7

 
1.7

 
1.9

Shares used in calculating diluted earnings per share
101.3

 
100.0

 
101.2

 
100.0

Net earnings per share:
 
 
 
 
 
 
 
Basic
$
0.45

 
$
0.58

 
$
1.10

 
$
1.22

Diluted
$
0.44

 
$
0.57

 
$
1.08

 
$
1.20