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Earnings Per Share (Tables) | 12 Months Ended
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Jan. 01, 2022
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table sets forth the computation of basic and diluted earnings per share:
| Fiscal Year
(In millions, except per share data) | 2021 |  | 2020 |  | 2019
Numerator: |  |  |  |  |
Net earnings (loss) attributable to Wolverine World Wide, Inc. | $ | 68.6 |  |  | $ | (136.9) |  |  | $ | 128.5 |
Less: net earnings attributed to participating share-based awards | (1.1) |  |  | (0.8) |  |  | (2.6) |
Net earnings (loss) used to calculate basic earnings per share | 67.5 |  |  | (137.7) |  |  | 125.9 |
Adjustment for earnings reallocated to participating share-based awards | — |  |  | — |  |  | 0.1 |
Net earnings (loss) used to calculate diluted earnings per share | $ | 67.5 |  |  | $ | (137.7) |  |  | $ | 126.0 |
Denominator: |  |  |  |  |
Weighted average shares outstanding | 82.4 |  |  | 81.8 |  |  | 85.7 |
Adjustment for unvested restricted common stock | (0.1) |  |  | (0.8) |  |  | (0.6) |
Shares used to calculate basic earnings per share | 82.3 |  |  | 81.0 |  |  | 85.1 |
Effect of dilutive share-based awards | 1.0 |  |  | — |  |  | 2.1 |
Shares used to calculate diluted earnings per share | 83.3 |  |  | 81.0 |  |  | 87.2 |
Net earnings (loss) per share: |  |  |  |  |
Basic | $ | 0.82 |  |  | $ | (1.70) |  |  | $ | 1.48 |
Diluted | $ | 0.81 |  |  | $ | (1.70) |  |  | $ | 1.44 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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