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Earnings Per Share Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Jan. 02, 2021	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net earnings attributable to Wolverine World Wide, Inc.	$ (170.7)	$ 22.4	$ (1.6)	$ 13.0	$ (0.9)	$ 48.7	$ 40.2	$ 40.5	$ (136.9)	$ 128.5	$ 200.1
Less: net earnings attributed to participating share-based awards									(0.8)	(2.6)	(7.5)
Net earnings (loss) used to calculate basic earnings per share									(137.7)	125.9	192.6
Adjustment for earnings reallocated to participating share-based awards									0.0	0.1	1.8
Net earnings (loss) used to calculate diluted earnings per share									$ (137.7)	$ 126.0	$ 194.4
Weighted average shares outstanding									81.8	85.7	94.8
Adjustment for unvested restricted common stock									(0.8)	(0.6)	(1.8)
Shares used to calculate basic earnings per share									81.0	85.1	93.0
Effect of dilutive share-based awards									0.0	2.1	2.0
Shares used to calculate diluted earnings per share									81.0	87.2	95.0
Earnings per share - Basic	$ (2.10)	$ 0.27	$ (0.02)	$ 0.16	$ (0.01)	$ 0.57	$ 0.45	$ 0.44	$ (1.70)	$ 1.48	$ 2.07
Earnings per share - Diluted	$ (2.10)	$ 0.27	$ (0.02)	$ 0.16	$ (0.01)	$ 0.57	$ 0.45	$ 0.43	$ (1.70)	$ 1.44	$ 2.05

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