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Weighted Average Number of Shares Diluted (Tables) | 12 Months Ended
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Dec. 31, 2020
Earnings per share [abstract] |
Disclosure of Weighted Average Diluted Shares |
| 2018 |  | 2019 |  | 2020
Weighted average number of shares (basic) | 139.4 |  |  | 131.0 |  |  | 129.1 |
Dilutive effect of outstanding awards under SBC plans | 1.2 |  |  | 0.8 |  |  | — |
Weighted average number of shares (diluted) | 140.6 |  |  | 131.8 |  |  | 129.1 |

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- Definition The disclosure of earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2020-01-01 -Paragraph 66 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2020-en-r&anchor=para_66&doctype=Standard -URIDate 2020-01-01 + Details
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