Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,185,864	1,228,157	1,184,559	131,004
Numerator:
Net earnings attributable to Wolverine World Wide, Inc.	$ 22.4	$ 48.7	$ 33.8	$ 129.4
Adjustment for earnings allocated to non-vested restricted common stock	(0.6)	(1.0)	(0.8)	(2.6)
Net earnings used in calculating basic earnings per share	21.8	47.7	33.0	126.8
Adjustment for earnings reallocated from non-vested restricted common stock	0.0	0.0	0.0	0.1
Net earnings used in calculating basic and diluted earnings per share	$ 21.8	$ 47.7	$ 33.0	$ 126.9
Denominator:
Weighted average shares outstanding	81,900,000	83,500,000	81,700,000	87,300,000
Adjustment for non-vested restricted common stock	(900,000)	(500,000)	(700,000)	(700,000)
Shares used in calculating basic earnings per share	81,000,000.0	83,000,000.0	81,000,000.0	86,600,000
Effect of dilutive stock options	500,000	900,000	500,000	1,400,000
Shares used in calculating diluted earnings per share	81,500,000	83,900,000	81,500,000	88,000,000.0
Net earnings per share:
Basic	$ 0.27	$ 0.57	$ 0.41	$ 1.46
Diluted	$ 0.27	$ 0.57	$ 0.41	$ 1.44