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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
Mar. 28, 2020
Mar. 30, 2019
Numerator:    
Net earnings attributable to Wolverine World Wide, Inc. $ 13.0 $ 40.5
Adjustment for earnings allocated to non-vested restricted common stock (0.2) (0.8)
Net earnings used in calculating basic and diluted earnings per share $ 12.8 $ 39.7
Denominator:    
Weighted average shares outstanding 81,400,000 91,000,000.0
Adjustment for non-vested restricted common stock (300,000) (1,000,000.0)
Shares used in calculating basic earnings per share 81,100,000 90,000,000.0
Effect of dilutive stock options 900,000 1,800,000
Shares used in calculating diluted earnings per share 82,000,000.0 91,800,000
Net earnings per share:    
Basic $ 0.16 $ 0.44
Diluted $ 0.16 $ 0.43
Antidilutive stock options exxcluded from computation of earnings per share 167,298 33,614