Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Numerator:
Net earnings attributable to Wolverine World Wide, Inc.	$ 40.2	$ 55.3	$ 80.7	$ 102.0
Adjustment for earnings allocated to non-vested restricted common stock	(0.8)	(1.2)	(1.6)	(2.2)
Net earnings used in calculating basic earnings per share	39.4	54.1	79.1	99.8
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	$ 39.4	$ 54.1	$ 79.2	$ 99.9
Denominator:
Weighted average shares outstanding	87,400,000	94,900,000	89,200,000	95,300,000
Adjustment for non-vested restricted common stock	(500,000)	(1,800,000)	(800,000)	(1,900,000)
Shares used in calculating basic earnings per share	86,900,000	93,100,000	88,400,000	93,400,000
Effect of dilutive stock options	1,400,000	1,900,000	1,700,000	1,900,000
Shares used in calculating diluted earnings per share	88,300,000	95,000,000.0	90,100,000	95,300,000
Net earnings per share:
Basic	$ 0.45	$ 0.58	$ 0.89	$ 1.07
Diluted	$ 0.45	$ 0.57	$ 0.88	$ 1.05
Antidilutive stock options exxcluded from computation of earnings per share	134,549	104,144	38,932	107,203