XML 298 R279.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Other Information- Commitments Agreements Telefonica (Details) € in Millions | 1 Months Ended
--- | ---
Mar. 31, 2024 EUR (€)
Additional information [abstract] |
IT Transformation Service Project | € 582
IT Transformation Service Project Term | 7 years
IT Transformation Service Project, Maximum Extension Term | 2 years

X
- References No definition available. + Details
Name: | ifrs-full_AdditionalInformationAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual Commitment, IT Transformation Service Project + References No definition available. + Details
Name: | tef_ContractualCommitmentITTransformationServiceProject
Namespace Prefix: | tef_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition IT Transformation Service Project, Maximum Extension Term + References No definition available. + Details
Name: | tef_ITTransformationServiceProjectMaximumExtensionTerm
Namespace Prefix: | tef_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition IT Transformation Service Project Term + References No definition available. + Details
Name: | tef_ITTransformationServiceProjectTerm
Namespace Prefix: | tef_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration