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Earnings Per Share (Tables)
 12 Months Ended
Dec. 30, 2017
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)
2017
 
2016
 
2015
Numerator:
 
 
 
 
 
Net earnings attributable to Wolverine World Wide, Inc.
$
0.3

 
$
87.7

 
$
122.8

Adjustment for earnings allocated to nonvested restricted common stock
—

 
(2.1
)
 
(2.8
)
Net earnings used to calculate basic earnings per share
0.3

 
85.6

 
120.0

Adjustment for earnings (loss) reallocated to nonvested restricted common stock
(0.2
)
 
0.1

 
0.1

Net earnings used to calculate diluted earnings per share
$
0.1

 
$
85.7

 
$
120.1

Denominator:
 
 
 
 
 
Weighted average shares outstanding
96.4

 
99.0

 
102.0

Adjustment for nonvested restricted common stock
(2.7
)
 
(3.7
)
 
(3.4
)
Shares used to calculate basic earnings per share
93.7

 
95.3

 
98.6

Effect of dilutive stock options
1.7

 
0.9

 
1.4

Shares used to calculate diluted earnings per share
95.4

 
96.2

 
100.0

Net earnings per share:
 
 
 
 
 
Basic
$
—

 
$
0.90

 
$
1.22

Diluted
$
—

 
$
0.89

 
$
1.20