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Earnings Per Share | 3 Months Ended
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Mar. 31, 2018
Earnings Per Share [Abstract] |
Earnings Per Share | EARNINGS PER SHARE The Company calculates earnings per share in accordance with FASB Accounting Standards Codification (“ASC”) Topic 260, Earnings Per Share (“ASC 260”). ASC 260 addresses whether instruments granted in share-based payment transactions are participating securities prior to vesting and, therefore, need to be included in the earnings allocation in computing earnings per share under the two-class method. Under the guidance in ASC 260, the Company’s unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents, whether paid or unpaid, are participating securities and must be included in the computation of earnings per share pursuant to the two-class method. The following table sets forth the computation of basic and diluted earnings per share.
| Quarter Ended
(In millions, except per share data) | March 31, 2018 |  | April 1, 2017
Numerator: |  |  |
Net earnings attributable to Wolverine World Wide, Inc. | $ | 46.7 |  |  | $ | 16.7 |
Adjustment for earnings allocated to non-vested restricted common stock | (0.9 | ) |  | (0.4 | )
Net earnings used in calculating basic and diluted earnings per share | $ | 45.8 |  |  | $ | 16.3 |
Denominator: |  |  |
Weighted average shares outstanding | 95.7 |  |  | 97.0 |
Adjustment for non-vested restricted common stock | (2.0 | ) |  | (2.5 | )
Shares used in calculating basic earnings per share | 93.7 |  |  | 94.5 |
Effect of dilutive stock options | 1.9 |  |  | 1.5 |
Shares used in calculating diluted earnings per share | 95.6 |  |  | 96.0 |
Net earnings per share: |  |  |
Basic | $ | 0.49 |  |  | $ | 0.17 |
Diluted | $ | 0.48 |  |  | $ | 0.17 |
For the quarters ended March 31, 2018 and April 1, 2017, options relating to 101,321 and 1,872,281 shares of common stock outstanding, respectively, have not been included in the denominator for the computation of diluted earnings per share because they were anti-dilutive.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=65016374&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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