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Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Apr. 03, 2021
Mar. 28, 2020
Earnings Per Share [Abstract]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 58,260 167,298
Numerator:    
Net earnings attributable to Wolverine World Wide, Inc. $ 38.5 $ 13.0
Adjustment for earnings allocated to non-vested restricted common stock (0.7) (0.2)
Net earnings used in calculating basic and diluted earnings per share $ 37.8 $ 12.8
Denominator:    
Weighted average shares outstanding 82,500,000 81,400,000
Adjustment for non-vested restricted common stock (400,000) (300,000)
Shares used in calculating basic earnings per share 82,100,000 81,100,000
Effect of dilutive stock options 1,100,000 900,000
Shares used in calculating diluted earnings per share 83,200,000 82,000,000.0
Net earnings per share:    
Basic $ 0.46 $ 0.16
Diluted $ 0.45 $ 0.16