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Other Information - Commitment Investment in Allianz (Details) - FTTH Joint Venture - EUR (€) € in Millions | Jan. 21, 2021 | Oct. 29, 2020
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Commitments [Line Items] |  |
Commitment to fund investment |  | € 500
Commitment to fund investment, period |  | 6 years
Proportion of ownership interest in joint venture | 50.00% |
TEF Infra Germany |  |
Commitments [Line Items] |  |
Commitment to fund investment |  | € 400
Proportion of ownership interest in joint venture | 40.00% |
TEF Germany |  |
Commitments [Line Items] |  |
Commitment to fund investment |  | 100
Proportion of ownership interest in joint venture | 10.00% |
Allianz |  |
Commitments [Line Items] |  |
Commitment to fund investment |  | € 1,000
Proportion of ownership interest in joint venture | 50.00% |

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- Definition The proportion of ownership interest in a joint venture attributable to the entity. [Refer: Total for all joint ventures [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2024-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_17_b_iii&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2024-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_16_b_iii&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2024-01-01 -Paragraph 21 -Subparagraph a -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_21_a_iv&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Commitment To Fund Investment + References No definition available. + Details
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- Definition Commitment To Fund Investment, Period + References No definition available. + Details
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- Definition Commitments [Line Items] + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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