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Earnings per Common Share | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Earnings per Common Share | 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):
| 2020 |  | 2019 |  | 2018
Numerator: |  |  |  |  |
Net income (loss) attributable to World Fuel | $ | 109.6 |  |  | $ | 178.9 |  |  | $ | 127.7 |
Denominator: |  |  |  |  |
Weighted average common shares for basic earnings per common share | 63.7 |  |  | 66.1 |  |  | 67.4 |
Effect of dilutive securities | 0.3 |  |  | 0.4 |  |  | 0.3 |
Weighted average common shares for diluted earnings per common share | 64.0 |  |  | 66.5 |  |  | 67.7 |
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 | 3.0 |  |  | 1.4 |  |  | 1.2 |
Basic earnings (loss) per common share | $ | 1.72 |  |  | $ | 2.71 |  |  | $ | 1.89 |
Diluted earnings (loss) per common share | $ | 1.71 |  |  | $ | 2.69 |  |  | $ | 1.89 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257 + Details
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