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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2018
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.
 
Quarter Ended
(In millions, except per share data)
March 31, 2018
 
April 1, 2017
Numerator:
 
 
 
Net earnings attributable to Wolverine World Wide, Inc.
$
46.7

 
$
16.7

Adjustment for earnings allocated to non-vested restricted common stock
(0.9
)
 
(0.4
)
Net earnings used in calculating basic and diluted earnings per share
$
45.8

 
$
16.3

Denominator:
 
 
 
Weighted average shares outstanding
95.7

 
97.0

Adjustment for non-vested restricted common stock
(2.0
)
 
(2.5
)
Shares used in calculating basic earnings per share
93.7

 
94.5

Effect of dilutive stock options
1.9

 
1.5

Shares used in calculating diluted earnings per share
95.6

 
96.0

Net earnings per share:
 
 
 
Basic
$
0.49

 
$
0.17

Diluted
$
0.48

 
$
0.17