XML 153 R134.htm IDEA: XBRL DOCUMENT v3.25.0.1

Associates and Joint Ventures - VMED O2 UK Narrative (Details) € in Millions, £ in Millions		7 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021 EUR (€)	Dec. 31, 2024 EUR (€)	Dec. 31, 2024 GBP (£)	Dec. 31, 2023 EUR (€)	Dec. 31, 2023 GBP (£)	Dec. 31, 2022 EUR (€)	Dec. 31, 2024 GBP (£)
Disclosure Of Joint Ventures And Associates [Line Items]
Goodwill impairment			€ 866		€ 58		€ 0
Valuation assumption, discount rate (in percentage)			7.70%	7.70%	7.50%	7.50%
Valuation assumption, perpetuity growth rate (in percentage)			1.00%	1.00%
Period covering projected cash flows for calculation of impairment			5 years	5 years
Valuation assumption, weighted average cost of capital, increase (decrease)			0.50%					0.50%
Valuation assumption, weighted average cost of capital, impairment of goodwill			€ 2,050	£ 1,700
Valuation assumption, perpetuity growth rate, increase (decrease)			0.25%					0.25%
Valuation assumption, increase (decrease) in EBITDA margin			1.00%					1.00%
Valuation assumption, increase (decrease) in long term investment ratio			0.50%					0.50%
Investments accounted for by the equity method			€ 8,143		€ 8,265
VMO2
Disclosure Of Joint Ventures And Associates [Line Items]
Goodwill impairment		€ 0	€ 0		3,572	£ 3,107	€ 0
Proportion of ownership interest in joint venture	50.00%	50.00%	50.00%	50.00%
Period covering projected cash flows for calculation of impairment			10 years	10 years
Amount by which unit's recoverable amount exceeds its carrying amount			€ 965					£ 800
Investments accounted for by the equity method			€ 7,641		7,774
VMO2 | Telefónica, S.A.
Disclosure Of Joint Ventures And Associates [Line Items]
Goodwill impairment					€ 1,786
Forecast | Minimum
Disclosure Of Joint Ventures And Associates [Line Items]
Valuation assumption, EBITDA margin (in percentage)			32.00%	32.00%
Valuation assumption, long-term capital expenditure ratio (in percentage)			12.00%	12.00%
Forecast | Maximum
Disclosure Of Joint Ventures And Associates [Line Items]
Valuation assumption, EBITDA margin (in percentage)			41.00%	41.00%
Valuation assumption, long-term capital expenditure ratio (in percentage)			15.00%	15.00%

X

- Definition

The amount by which a cash-generating unit's (group of units') recoverable amount exceeds its carrying amount. [Refer: Carrying amount [member]; Total for all cash-generating units [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2024-01-01
-Paragraph 134
-Subparagraph f
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_134_f_i&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2024-01-01
-Paragraph 135
-Subparagraph e
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_135_e_i&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_AmountByWhichUnitsRecoverableAmountExceedsItsCarryingAmount
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2024-01-01
-Paragraph B67
-Subparagraph d
-Clause v
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B67_d_v&doctype=Appendix&subtype=B
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_ImpairmentLossRecognisedInProfitOrLossGoodwill
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of investments in joint ventures accounted for using the equity method. [Refer: Total for all joint ventures [member]; Investments accounted for using equity method]

+ 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_InvestmentsInJointVenturesAccountedForUsingEquityMethod
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- 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

Name:	ifrs-full_ProportionOfOwnershipInterestInJointVenture
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

[Line Items] for Disclosure Of Joint Ventures And Associates [Table]

+ References

No definition available.

+ Details

Name:	tef_DisclosureOfJointVenturesAndAssociatesLineItems
Namespace Prefix:	tef_
Data Type:	xbrli:stringItemType
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

X

- Definition

Valuation Assumption, Discount Rate, Percentage

+ References

No definition available.

+ Details

Name:	tef_ValuationAssumptionDiscountRatePercentage
Namespace Prefix:	tef_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Valuation Assumption, EBITDA Margin, Percentage

+ References

No definition available.

+ Details

Name:	tef_ValuationAssumptionEBITDAMarginPercentage
Namespace Prefix:	tef_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Valuation Assumption, Increase (Decrease) In EBITDA Margin

+ References

No definition available.

+ Details

Name:	tef_ValuationAssumptionIncreaseDecreaseInEBITDAMargin
Namespace Prefix:	tef_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Valuation Assumption, Increase (Decrease) In Long Term Investment Ratio

+ References

No definition available.

+ Details

Name:	tef_ValuationAssumptionIncreaseDecreaseInLongTermInvestmentRatio
Namespace Prefix:	tef_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Valuation Assumption, Long-Term Capital Expenditure Ratio, Percentage

+ References

No definition available.

+ Details

Name:	tef_ValuationAssumptionLongTermCapitalExpenditureRatioPercentage
Namespace Prefix:	tef_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Valuation Assumption, Perpetuity Growth Rate, Increase (Decrease)

+ References

No definition available.

+ Details

Name:	tef_ValuationAssumptionPerpetuityGrowthRateIncreaseDecrease
Namespace Prefix:	tef_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Valuation Assumption, Perpetuity Growth Rate, Percentage

+ References

No definition available.

+ Details

Name:	tef_ValuationAssumptionPerpetuityGrowthRatePercentage
Namespace Prefix:	tef_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Valuation Assumption, Weighted Average Cost Of Capital, Impairment Of Goodwill

+ References

No definition available.

+ Details

Name:	tef_ValuationAssumptionWeightedAverageCostOfCapitalImpairmentOfGoodwill
Namespace Prefix:	tef_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Valuation Assumption, Weighted Average Cost Of Capital, Increase (Decrease)

+ References

No definition available.

+ Details

Name:	tef_ValuationAssumptionWeightedAverageCostOfCapitalIncreaseDecrease
Namespace Prefix:	tef_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	ifrs-full_JointVenturesAxis=tef_VMEDO2UKLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: