Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		8 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 10, 2016	Sep. 10, 2016	Sep. 30, 2017
Numerator:
Net earnings attributable to Wolverine World Wide, Inc.	$ 23.2	$ 48.2	$ 89.6	$ 60.6
Adjustment for earnings allocated to non-vested restricted common stock	(0.5)	(1.0)	(1.9)	(1.3)
Net earnings used in calculating basic and diluted earnings per share	$ 22.7	$ 47.2	$ 87.7	$ 59.3
Denominator:
Weighted average shares outstanding	96.1	99.4	99.4	96.6
Adjustment for non-vested restricted common stock	(2.1)	(3.8)	(3.8)	(2.2)
Shares used in calculating basic earnings per share	94.0	95.6	95.6	94.4
Effect of dilutive stock options	1.8	1.3	0.7	1.6
Shares used in calculating diluted earnings per share	95.8	96.9	96.3	96.0
Net earnings per share:
Basic	$ 0.24	$ 0.49	$ 0.92	$ 0.63
Diluted	$ 0.24	$ 0.49	$ 0.91	$ 0.62