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. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Numerator:
Net earnings attributable to Wolverine World Wide, Inc.	$ 48.7	$ 58.8	$ 129.4	$ 160.8
Adjustment for earnings allocated to non-vested restricted common stock	(1.0)	(1.2)	(2.6)	(3.4)
Net earnings used in calculating basic earnings per share	47.7	57.6	126.8	157.4
Adjustment for earnings reallocated from non-vested restricted common stock	0.0	0.0	0.1	0.1
Net earnings used in calculating diluted earnings per share	$ 47.7	$ 57.6	$ 126.9	$ 157.5
Denominator:
Weighted average shares outstanding	83,500,000	94,900,000	87,300,000	95,200,000
Adjustment for non-vested restricted common stock	(500,000)	(1,700,000)	(700,000)	(1,800,000)
Shares used in calculating basic earnings per share	83,000,000.0	93,200,000	86,600,000	93,400,000
Effect of dilutive stock options	900,000	2,100,000	1,400,000	2,000,000.0
Shares used in calculating diluted earnings per share	83,900,000	95,300,000	88,000,000.0	95,400,000
Net earnings per share:
Basic	$ 0.57	$ 0.62	$ 1.46	$ 1.69
Diluted	$ 0.57	$ 0.60	$ 1.44	$ 1.65
Antidilutive stock options exxcluded from computation of earnings per share	1,228,157	18,779	131,004	24,250