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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 28, 2019
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following table sets forth the computation of basic and diluted earnings per share:
| Three Months Ended |  |  | Nine Months Ended |
| September 28, |  |  | September 29, |  |  | September 28, |  |  | September 29, |
| 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
WW International, Inc. | $ | 47,086 |  |  | $ | 70,132 |  |  | $ | 90,233 |  |  | $ | 179,964 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares of common stock outstanding |  | 67,298 |  |  |  | 66,701 |  |  |  | 67,129 |  |  |  | 66,074 |
Effect of dilutive common stock equivalents |  | 2,319 |  |  |  | 3,630 |  |  |  | 2,235 |  |  |  | 4,043 |
Weighted average diluted common shares outstanding |  | 69,617 |  |  |  | 70,331 |  |  |  | 69,364 |  |  |  | 70,117 |
Earnings per share attributable to WW International, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic | $ | 0.70 |  |  | $ | 1.05 |  |  | $ | 1.34 |  |  | $ | 2.72 |
Diluted | $ | 0.68 |  |  | $ | 1.00 |  |  | $ | 1.30 |  |  | $ | 2.57 |

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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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