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Earnings per share - Weighted average number of shares used as the denominator (Details) - shares shares in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Earnings per share |  |  |
Weighted average number of shares outstanding | 164,415 | 163,223 | 163,223
Weighted average number of treasury shares | (2,122) | (2,211) | (2,332)
Weighted average number of ordinary shares used as the denominator in calculating basic earnings per share | 162,293 | 161,012 | 160,891
Equity settled share - based payment | 158 | 181 | 167
Weighted average number of ordinary shares and potential ordinary shares used as the denominator in calculating diluted earnings per share | 162,451 | 161,193 | 161,058

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- Definition The number of shares equity settled share based payment. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition The weighted average number of shares outstanding. + References No definition available. + Details
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Namespace Prefix: | caap_
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Balance Type: | na
Period Type: | duration

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- Definition The weighted average number of treasury shares outstanding + References No definition available. + Details
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Period Type: | duration

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- Definition The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2025-01-01 -Paragraph 70 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2025-en-r&anchor=para_70_b&doctype=Standard -URIDate 2025-03-27 + Details
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- References No definition available. + Details
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- Definition The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2025-01-01 -Paragraph 70 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2025-en-r&anchor=para_70_b&doctype=Standard -URIDate 2025-03-27 + Details
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