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Revenue and Expenses - Data Used for Calculation of Basic and Diluted Earnings Per Share (Details) - EUR (€) € in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Profit attributable to ordinary equity holders of parent |  |  |
(Loss) profit attributable to ordinary equity holders of the parent company | € (49) | € (892) | € 2,011
Adjustment for the coupon corresponding to perpetual subordinated obligations | (359) | (339) | (279)
Tax effect | 90 | 85 | 70
Total (loss) profit attributable to ordinary equity holders of the parent for basic and diluted earnings per share | € (318) | € (1,146) | € 1,802
Number of shares (thousands) |  |  |
Weighted average number of ordinary shares (excluding treasury shares) for basic earnings per share (in shares) | 5,635,695,000 | 5,668,142,000 | 5,740,105,000
Telefónica, S.A. share option plans (in shares) | 36,575,000 | 47,435,000 | 23,096,000
Weighted average number of ordinary shares outstanding for diluted earnings per share (excluding treasury shares) (in shares) | 5,672,270,000 | 5,715,577,000 | 5,763,201,000

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- Definition The profit (loss) from continuing operations attributable to ordinary equity holders of the parent entity. [Refer: Continuing operations, unless line item indicates otherwise [member]; Profit (loss) from continuing operations] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2024-01-01 -Paragraph 70 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_70_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The profit (loss) from continuing operations attributable to ordinary equity holders of the parent entity, adjusted for the effects of all dilutive potential ordinary shares. [Refer: Profit (loss) from continuing operations] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2024-01-01 -Paragraph 70 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_70_a&doctype=Standard -URIDate 2024-03-27 + 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 2024-01-01 -Paragraph 70 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_70_b&doctype=Standard -URIDate 2024-03-27 + Details
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