XML 148 R129.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Rights of Use - Narrative (Details) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 EUR (€)
Disclosure of quantitative information about right-of-use assets [line items] |
Business combi-nations | € 22
Colombia Telecomunicaciones S.A. ESP BIC And Colombia Móvil S.A. ESP |
Disclosure of quantitative information about right-of-use assets [line items] |
Business combi-nations | € 22

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Inclusion Of Companies, Right-Of-Use Assets + References No definition available. + Details
Name: | tef_InclusionOfCompaniesRightOfUseAssets
Namespace Prefix: | tef_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=tef_ColombiaTelecomunicacionesS.A.ESPBICAndColombiaMovilS.A.ESPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |