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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2018
Earnings Per Share [Abstract] |
Computation of Basic and Diluted Earnings Per Share | The following table sets forth the computation of basic and diluted earnings per share.
| Quarter Ended |  | Year-To-Date Ended
(In millions, except per share data) | June 30, 2018 |  | July 1, 2017 |  | June 30, 2018 |  | July 1, 2017
Numerator: |  |  |  |  |  |  |
Net earnings attributable to Wolverine World Wide, Inc. | $ | 55.3 |  |  | $ | 20.7 |  |  | $ | 102.0 |  |  | $ | 37.4 |
Adjustment for earnings allocated to non-vested restricted common stock | (1.2 | ) |  | (0.5 | ) |  | (2.2 | ) |  | (0.8 | )
Net earnings used in calculating basic earnings per share | 54.1 |  |  | 20.2 |  |  | 99.8 |  |  | 36.6 |
Adjustment for earnings reallocated from non-vested restricted common stock | — |  |  | — |  |  | 0.1 |  |  | — |
Net earnings used in calculating diluted earnings per share | $ | 54.1 |  |  | $ | 20.2 |  |  | $ | 99.9 |  |  | $ | 36.6 |
Denominator: |  |  |  |  |  |  |
Weighted average shares outstanding | 94.9 |  |  | 96.8 |  |  | 95.3 |  |  | 96.9 |
Adjustment for non-vested restricted common stock | (1.8 | ) |  | (2.2 | ) |  | (1.9) |  |  | (2.3) |
Shares used in calculating basic earnings per share | 93.1 |  |  | 94.6 |  |  | 93.4 |  |  | 94.6 |
Effect of dilutive stock options | 1.9 |  |  | 1.6 |  |  | 1.9 |  |  | 1.5 |
Shares used in calculating diluted earnings per share | 95.0 |  |  | 96.2 |  |  | 95.3 |  |  | 96.1 |
Net earnings per share: |  |  |  |  |  |  |
Basic | $ | 0.58 |  |  | $ | 0.21 |  |  | $ | 1.07 |  |  | $ | 0.39 |
Diluted | $ | 0.57 |  |  | $ | 0.21 |  |  | $ | 1.05 |  |  | $ | 0.38 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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