XML 182 R163.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Equity - Revaluation Reserves and Reserve for Canceled Share Capital (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Share Capital, Reserves And Other Equity Interest [Abstract] |  |
Increase through appropriation of retained earnings | € 2 | € 3
Revaluation reserve | 49 | 51
Capital redemption reserve recorded | 80 | € 25
Capital redemption reserve | € 1,059 |

X
- Definition A component of equity representing the reserve for the redemption of the entity's own shares. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_CapitalRedemptionReserve
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The increase (decrease) in equity resulting from transfers between a revaluation surplus and retained earnings. [Refer: Retained earnings; Revaluation surplus] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 106 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106_d&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_IncreaseDecreaseThroughTransferBetweenRevaluationReserveAndRetainedEarnings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A component of equity representing the accumulated revaluation surplus on the revaluation of assets recognised in other comprehensive income. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2024-01-01 -Paragraph 85 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_85&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 39 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_39&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_RevaluationSurplus
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Capital redemption reserve recorded + References No definition available. + Details
Name: | tef_CapitalRedemptionReserveRecorded
Namespace Prefix: | tef_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Share capital, reserves and other equity interest [Abstract] + References No definition available. + Details
Name: | tef_ShareCapitalReservesAndOtherEquityInterestAbstract
Namespace Prefix: | tef_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration