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Earnings Per Share (Tables)
 12 Months Ended
Dec. 29, 2018
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
The following table sets forth the computation of basic and diluted earnings per share:
 
Fiscal Year
(In millions, except per share data)
2018
 
2017
 
2016
Numerator:
 
 
 
 
 
Net earnings attributable to Wolverine World Wide, Inc.
$
200.1

 
$
0.3

 
$
87.7

Adjustment for earnings allocated to nonvested restricted common stock
(7.5
)
 
—

 
(2.1
)
Net earnings used to calculate basic earnings per share
192.6

 
0.3

 
85.6

Adjustment for earnings (loss) reallocated to nonvested restricted common stock
1.8

 
(0.2
)
 
0.1

Net earnings used to calculate diluted earnings per share
$
194.4

 
$
0.1

 
$
85.7

Denominator:
 
 
 
 
 
Weighted average shares outstanding
94.8

 
96.4

 
99.0

Adjustment for nonvested restricted common stock
(1.8
)
 
(2.7
)
 
(3.7
)
Shares used to calculate basic earnings per share
93.0

 
93.7

 
95.3

Effect of dilutive stock options
2.0

 
1.7

 
0.9

Shares used to calculate diluted earnings per share
95.0

 
95.4

 
96.2

Net earnings per share:
 
 
 
 
 
Basic
$
2.07

 
$
—

 
$
0.90

Diluted
$
2.05

 
$
—

 
$
0.89