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Equity-based compensation (Tables) | 6 Months Ended
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Jun. 30, 2021
Share-Based Payment Arrangements [Abstract] |
Summary of unvested share movements | The below table summarizes unvested share movements for all Alcon equity-based incentive plans for the six months June 30, 2021 and 2020:
|  | Six months ended June 30
(shares in millions) |  | 2021 |  | 2020
Unvested at January 1 |  | 5.4 |  |  | 4.7 |
Granted |  | 1.8 |  |  | 2.0 |
Vested |  | (1.1) |  |  | (1.0) |
Forfeited |  | (0.2) |  |  | (0.2) |
Unvested at June 30 |  | 5.9 |  |  | 5.5 |

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- Definition Share-Based Payment Arrangements [Abstract] + References No definition available. + Details
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- Definition The disclosure of the number and weighted average exercise prices of other equity instruments (ie other than share options). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45&doctype=Standard -URIDate 2020-01-01 + Details
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