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Earnings per Common Share | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Earnings per Common Share | 10. Earnings per Common Share The following table sets forth the computation of basic and diluted earnings per common share for the periods presented (in millions, except per share amounts):
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2021 |  | 2020 |  | 2021 |  | 2020
Numerator: |  |  |  |  |  |  |  |
Net income attributable to World Fuel |  | $ | 17.6 |  |  | $ | (10.2) |  |  | $ | 36.5 |  |  | $ | 31.2 |
Denominator: |  |  |  |  |  |  |  |
Weighted average common shares for basic earnings per common share |  | 63.4 |  |  | 63.3 |  |  | 63.2 |  |  | 64.1 |
Effect of dilutive securities |  | 0.4 |  |  | — |  |  | 0.5 |  |  | 0.3 |
Weighted average common shares for diluted earnings per common share |  | 63.8 |  |  | 63.3 |  |  | 63.6 |  |  | 64.4 |
Basic earnings (loss) per common share |  | $ | 0.28 |  |  | $ | (0.16) |  |  | $ | 0.58 |  |  | $ | 0.49 |
Diluted earnings (loss) per common share |  | $ | 0.28 |  |  | $ | (0.16) |  |  | $ | 0.57 |  |  | $ | 0.48 |
Weighted average securities which are not included in the calculation of diluted earnings per common share because their impact is anti-dilutive or their performance conditions have not been met |  | 0.9 |  |  | 3.4 |  |  | 0.9 |  |  | 2.8 |

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