Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	494,447	1,185,864	576,081	1,184,559
Numerator:
Net earnings attributable to Wolverine World Wide, Inc.	$ 0.0	$ 22.4	$ 83.2	$ 33.8
Adjustment for earnings allocated to non-vested restricted common stock	(0.2)	(0.6)	(1.4)	(0.8)
Net earnings (loss) used in calculating basic and diluted earnings per share	$ (0.2)	$ 21.8	$ 81.8	$ 33.0
Denominator:
Weighted average shares outstanding	82,300,000	81,900,000	82,500,000	81,700,000
Adjustment for non-vested restricted common stock	0	(900,000)	(100,000)	(700,000)
Shares used in calculating basic earnings per share	82,300,000	81,000,000.0	82,400,000	81,000,000.0
Effect of dilutive stock options	0	500,000	1,000,000.0	500,000
Shares used in calculating diluted earnings per share	82,300,000	81,500,000	83,400,000	81,500,000
Net earnings per share:
Basic	$ 0.00	$ 0.27	$ 0.99	$ 0.41
Diluted	$ 0.00	$ 0.27	$ 0.98	$ 0.41