Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	426,920	1,955,425	345,247	1,183,907
Numerator:
Net earnings (loss) attributable to Wolverine World Wide, Inc.	$ 44.7	$ (1.6)	$ 83.2	$ 11.4
Adjustment for earnings allocated to non-vested restricted common stock	(0.7)	(0.2)	(1.4)	(0.4)
Net earnings (loss) used in calculating basic and diluted earnings per share	$ 44.0	$ (1.8)	$ 81.8	$ 11.0
Denominator:
Weighted average shares outstanding	82,600,000	81,700,000	82,500,000	81,600,000
Adjustment for non-vested restricted common stock	(100,000)	(800,000)	(200,000)	(600,000)
Shares used in calculating basic earnings per share	82,500,000	80,900,000	82,300,000	81,000,000.0
Effect of dilutive stock options	1,100,000	0	1,100,000	500,000
Shares used in calculating diluted earnings per share	83,600,000	80,900,000	83,400,000	81,500,000
Net earnings (loss) per share:
Basic	$ 0.53	$ (0.02)	$ 0.99	$ 0.14
Diluted	$ 0.53	$ (0.02)	$ 0.98	$ 0.14