XML 116 R97.htm IDEA: XBRL DOCUMENT v3.25.0.1

Accounting Policies - Impairment of non-current assets, Financial Assets (Details)	12 Months Ended
	Dec. 31, 2024 cycle
Disclosure Of Significant Accounting Policies [Abstract]
Period covering projected cash flows for calculation of impairment	5 years
Collection cycles	24

X

- Definition

Disclosure Of Significant Accounting Policies [Abstract]

+ References

No definition available.

+ Details

Name:	tef_DisclosureOfSignificantAccountingPoliciesAbstract
Namespace Prefix:	tef_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number Of Collection Cycles, Credit Impairment

+ References

No definition available.

+ Details

Name:	tef_NumberOfCollectionCyclesCreditImpairment
Namespace Prefix:	tef_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period covering projected cash flows for calculation of impairment

+ References

No definition available.

+ Details

Name:	tef_PeriodCoveringProjectedCashFlowsForCalculationOfImpairment
Namespace Prefix:	tef_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration