XML 260 R244.htm IDEA: XBRL DOCUMENT v3.22.4

Appendix I: Scope of Consolidation - Main Consolidated Companies of the Telefonica Group (Details) € in Millions, ₨ in Millions, лв in Millions, дин in Millions, ¥ in Millions, £ in Millions, kr in Millions, kr in Millions, kr in Millions, kn in Millions, VEF in Millions, SFr in Millions, S/ in Millions, R$ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022 EUR (€)	Dec. 31, 2022 BRL (R$)	Dec. 31, 2022 VEF	Dec. 31, 2022 COP ($)	Dec. 31, 2022 MXN ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 ARS ($)	Dec. 31, 2022 CLP ($)	Dec. 31, 2022 PEN (S/)	Dec. 31, 2022 UYU ($)	Dec. 31, 2022 GBP (£)	Dec. 31, 2022 BGN (лв)	Dec. 31, 2022 INR (₨)	Dec. 31, 2022 SEK (kr)	Dec. 31, 2022 CHF (SFr)	Dec. 31, 2022 DKK (kr)	Dec. 31, 2022 NOK (kr)	Dec. 31, 2022 RSD (дин)	Dec. 31, 2022 HRK (kn)	Dec. 31, 2022 CNY (¥)	Dec. 31, 2021 EUR (€)	Dec. 31, 2020 EUR (€)	Dec. 31, 2019 EUR (€)
Disclosure of subsidiaries [line items]
Equity	€ 31,708																				€ 28,684	€ 18,260	€ 25,450
Investments accounted for by the equity method	11,587																				€ 12,773
Telefonica de Espana [Member]
Disclosure of subsidiaries [line items]
Equity	€ 1,024
Proportion of ownership interest (as a percent)	100.00%
Telefónica Móviles España
Disclosure of subsidiaries [line items]
Equity	€ 209
Proportion of ownership interest (as a percent)	100.00%
Teleinformatica y Comunicaciones [Member]
Disclosure of subsidiaries [line items]
Equity	€ 8
Proportion of ownership interest (as a percent)	100.00%
Telefonica Soluciones de Informatica y Com. de Espana [Member]
Disclosure of subsidiaries [line items]
Equity	€ 2
Proportion of ownership interest (as a percent)	100.00%
Telefonica Soluciones de Outsourcing [Member]
Disclosure of subsidiaries [line items]
Equity	€ 1
Proportion of ownership interest (as a percent)	100.00%
Telefonica Servicios Integrales de Distribucion [Member]
Disclosure of subsidiaries [line items]
Equity	€ 2
Proportion of ownership interest (as a percent)	100.00%
Telefónica de Contenidos, S.A.U. Organization and operation of multimedia service-related business
Disclosure of subsidiaries [line items]
Equity	€ 226
Proportion of ownership interest (as a percent)	100.00%
Telefonica Servicios Audiovisuales [Member]
Disclosure of subsidiaries [line items]
Equity	€ 6
Proportion of ownership interest (as a percent)	100.00%
Telefonica Broadcast Services [Member]
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
TBSC Barcelona Producciones, S.L.U.
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Audiovisual Digital, S.L.U. Provision of all type of audiovisual telecommunications services
Disclosure of subsidiaries [line items]
Equity	€ 46
Proportion of ownership interest (as a percent)	100.00%
Telefonica Global Technology [Member]
Disclosure of subsidiaries [line items]
Equity	€ 16
Proportion of ownership interest (as a percent)	100.00%
Telefonica Educacion Digital [Member]
Disclosure of subsidiaries [line items]
Equity	€ 1
Proportion of ownership interest (as a percent)	100.00%
Bluevia Fibra, S.L.U.
Disclosure of subsidiaries [line items]
Equity	€ 68
Proportion of ownership interest (as a percent)	55.00%
Bluevia Fibra, S.L.U. | Telefónica España Filiales, S.A
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	30.00%
Bluevia Fibra, S.L.U. | Telefónica Infra, S.L.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	25.00%
Solar360 Soluciones De Instalacion y Mantenimiento S.L.
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	51.00%
Telefónica Deutschland Holding, A.G.
Disclosure of subsidiaries [line items]
Equity	€ 2,975
Proportion of ownership interest (as a percent)	70.58%
Telefónica Deutschland Holding, A.G. | Telefónica Germany Holdings Limited
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	69.22%
Telefónica Deutschland Holding, A.G. | Telefónica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	1.36%
Telefónica Germany GmbH & Co. OHG
Disclosure of subsidiaries [line items]
Equity	€ 51
Proportion of ownership interest (as a percent)	70.58%
Telefónica Germany GmbH & Co. OHG | Telefónica Deutschland Holding A.G.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	70.57%
Telefónica Germany GmbH & Co. OHG | T Germany Management GmbH
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	1.00%
E-Plus [Member]
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	70.58%
Telefónica Germany Next GmbH Technological and consulting services in Big Data provider
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	70.58%
O2 Telefónica Deutschland Finanzierungs, GmbH
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	70.58%
Telefónica Brazil
Disclosure of subsidiaries [line items]
Equity | R$		R$ 63,571
Proportion of ownership interest (as a percent)	74.79%
Telefónica Brazil | Telefónica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	3783.00%
Telefónica Brazil | Telefónica Latinoamérica Holding, S.L.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	3631.00%
Telefónica Brazil | Telefónica Chile, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	6.00%
Terra Networks Brasil [Member]
Disclosure of subsidiaries [line items]
Equity | R$		136
Proportion of ownership interest (as a percent)	74.79%
Telefônica Infraestructura e Segurança Brasil Ltda. Security services and systems
Disclosure of subsidiaries [line items]
Equity | R$		289
Proportion of ownership interest (as a percent)	74.79%
Garliava RJ Infraestrutura E Redes De Telecomunicacoes S.A. Wireline Telephony Operator
Disclosure of subsidiaries [line items]
Equity | R$		1,121
Proportion of ownership interest (as a percent)	74.79%
Vivo Ventures Fundo De Investimento Em Participacoes Multiestrategia
Disclosure of subsidiaries [line items]
Equity | R$		21
Proportion of ownership interest (as a percent)	75.29%
Vivo Ventures Fundo De Investimento Em Participacoes Multiestrategia | Telefônica Brasil, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	7329.00%
Vivo Ventures Fundo De Investimento Em Participacoes Multiestrategia | Telefonica Open Innovation S.L.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	200.00%
Vita IT Comercio E Servicos De Solucoes Em TI Ltda
Disclosure of subsidiaries [line items]
Equity | R$		2
Proportion of ownership interest (as a percent)	74.79%
Telefónica Hispam Norte
Disclosure of subsidiaries [line items]
Equity	€ 78
Proportion of ownership interest (as a percent)	100.00%
TLH Holdco S.L.
Disclosure of subsidiaries [line items]
Equity	€ 85
Proportion of ownership interest (as a percent)	100.00%
Telefonica Venezolana
Disclosure of subsidiaries [line items]
Equity | VEF			VEF 394
Proportion of ownership interest (as a percent)	100.00%
Telefonica Venezolana | Telefónica Hispanoamérica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	86.72%
Telefonica Venezolana | Comtel Comunicaciones Telefónicas, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	2.56%
Colombia Telecomunicaciones, S.A., ESP
Disclosure of subsidiaries [line items]
Equity | $				$ 3,410
Proportion of ownership interest (as a percent)	67.50%
Operaciones Tecnológicas y Comerciales S.A.S Communications services operator
Disclosure of subsidiaries [line items]
Equity | $				3,330
Proportion of ownership interest (as a percent)	67.50%
Pegaso Pcs S.A. de CV
Disclosure of subsidiaries [line items]
Equity | $					$ 1,405
Proportion of ownership interest (as a percent)	100.00%
Pegaso Pcs S.A. de CV | Telefónica Hispanoamérica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	99.95%
Pegaso Pcs S.A. de CV | Celular de Telefonía S.A. de CV.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	0.05%
Terra Networks México, S.A. de C.V. ISP, portal and real-time financial information services
Disclosure of subsidiaries [line items]
Equity | $					305
Proportion of ownership interest (as a percent)	100.00%
Terra Networks México, S.A. de C.V. ISP, portal and real-time financial information services
Disclosure of subsidiaries [line items]
Equity | $					3,505
Proportion of ownership interest (as a percent)	100.00%
Terra Networks México, S.A. de C.V. ISP, portal and real-time financial information services | Telefónica Hispanoamérica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	99.99%
Terra Networks México, S.A. de C.V. ISP, portal and real-time financial information services | Pegaso Pcs S.A. de CV
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	0.01%
Otecel, S.A. Wireless communications services provider
Disclosure of subsidiaries [line items]
Equity | $						$ 183
Proportion of ownership interest (as a percent)	100.00%
Telefónica de Argentina, S.A. Telecommunications service provider
Disclosure of subsidiaries [line items]
Equity | $							$ 239,296
Proportion of ownership interest (as a percent)	100.00%
Telefónica de Argentina, S.A. Telecommunications service provider | Telefónica Móviles Argentina, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	77.64%
Telefónica de Argentina, S.A. Telecommunications service provider | TLH Holdco S.L.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	22.36%
Telefónica Móviles Argentina, S.A. Telecommunications service provider
Disclosure of subsidiaries [line items]
Equity | $							27,201
Proportion of ownership interest (as a percent)	100.00%
Telefónica Emisiones, S.A.U.
Disclosure of subsidiaries [line items]
Equity | $								$ 1,364,872
Proportion of ownership interest (as a percent)	100.00%
Telefónica Emisiones, S.A.U. | Telefónica Hispanoamérica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	1.04%
Telefónica Emisiones, S.A.U. | Inversiones Telefónica Internacional Holding SpA.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	98.96%
Telefónica Chile, S.A.
Disclosure of subsidiaries [line items]
Equity | $								809,773
Proportion of ownership interest (as a percent)	99.34%
Telefónica Chile Holdings, S.L. Holding Company
Disclosure of subsidiaries [line items]
Equity | $								0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Chile Holdings, S.L.U. Holding Company
Disclosure of subsidiaries [line items]
Equity | S/									S/ 2,107
Proportion of ownership interest (as a percent)	98.94%
Telefónica del Perú, S.A.A. Local, domestic and international long distance telephone service provider
Disclosure of subsidiaries [line items]
Equity | S/									158
Proportion of ownership interest (as a percent)	100.00%
Media Networks Latin America, S.A.C Telecommunications research activities and proyects
Disclosure of subsidiaries [line items]
Equity | $										$ 1,107
Proportion of ownership interest (as a percent)	100.00%
Telefónica Infra, S.L.
Disclosure of subsidiaries [line items]
Equity	€ 12
Proportion of ownership interest (as a percent)	100.00%
Telefónica Infra Germany GmbH
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica O2 Holdings Ltd. Holding company
Disclosure of subsidiaries [line items]
Equity | £											£ 9
Proportion of ownership interest (as a percent)	100.00%
Telefónica O2 Holdings Ltd. Holding company | Telefónica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	99.99%
Telefónica O2 Holdings Ltd. Holding company | Telefónica Capital S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	0.01%
MmO2 plc Holding company
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
O2 International Holdings Ltd. Holding company
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
O2 (Netherlands ) Holdings BV. Holding company
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Germany Holdings Ltd. Holding company
Disclosure of subsidiaries [line items]
Equity	€ 3,463
Proportion of ownership interest (as a percent)	100.00%
O2 (Europe) Ltd. Holding company
Disclosure of subsidiaries [line items]
Equity	€ 6,895
Proportion of ownership interest (as a percent)	100.00%
Telefónica International Holding, B.V Holding company
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Latinoamérica Holding, S.L. Sociedad holding
Disclosure of subsidiaries [line items]
Equity	€ 291
Proportion of ownership interest (as a percent)	100.00%
Telefonica Global Solutions, S.L.U.
Disclosure of subsidiaries [line items]
Equity	€ 1
Proportion of ownership interest (as a percent)	100.00%
Telefonica Global Solutions USA
Disclosure of subsidiaries [line items]
Equity | $						202
Proportion of ownership interest (as a percent)	100.00%
Telefonica Global Solutions Germany GmbH.
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Digital España, S.L. Developer Telco Services Holding Company
Disclosure of subsidiaries [line items]
Equity | $					31
Proportion of ownership interest (as a percent)	100.00%
Telefónica Digital Ltd. Developer Telco Services
Disclosure of subsidiaries [line items]
Equity	€ 26
Proportion of ownership interest (as a percent)	100.00%
Telefonica Open Innovation S.L. Talent identification and development in ICT.
Disclosure of subsidiaries [line items]
Equity | £											45
Proportion of ownership interest (as a percent)	100.00%
Telefonica Open Innovation S.L.
Disclosure of subsidiaries [line items]
Equity	€ 2
Proportion of ownership interest (as a percent)	100.00%
Wayra Brasil Desenvolvedora e Apoiadora de Projetos Ltda Technological innovation based business project development
Disclosure of subsidiaries [line items]
Equity | $								29,899
Proportion of ownership interest (as a percent)	100.00%
WY Telecom, S.A. de C.V. Talent identification and development in ICT
Disclosure of subsidiaries [line items]
Equity | R$		52
Proportion of ownership interest (as a percent)	100.00%
Wayra Argentina, S.A. Talent identification and development in ICT
Disclosure of subsidiaries [line items]
Equity | $					173
Proportion of ownership interest (as a percent)	100.00%
Wayra Colombia, S.A.S. Technological innovation based business project development
Disclosure of subsidiaries [line items]
Equity | $							1,133
Proportion of ownership interest (as a percent)	100.00%
Wayra Colombia, S.A.S. Technological innovation based business project development | Telefónica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	5.00%
Wayra Colombia, S.A.S. Technological innovation based business project development | Telefonica Open Innovation S.L.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	95.00%
Proyecto Wayra, C.A. Commercial, industrial and mercantile activities
Disclosure of subsidiaries [line items]
Equity | $				2,304
Proportion of ownership interest (as a percent)	100.00%
Wayra Perú Aceleradora de Proyectos, S.A.C. Technological innovation based business project development
Disclosure of subsidiaries [line items]
Equity | VEF			VEF 2
Proportion of ownership interest (as a percent)	100.00%
Wayra UK Ltd. Technological innovation based business project development
Disclosure of subsidiaries [line items]
Equity | S/									28
Proportion of ownership interest (as a percent)	100.00%
Terra Networks Perú, S.A. ISP and portal
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Terra Networks Argentina, S.A. ISP and portal
Disclosure of subsidiaries [line items]
Equity | S/									10
Proportion of ownership interest (as a percent)	100.00%
Telfisa Global, B.V. Integrated cash management, consulting and financial support for Group companies
Disclosure of subsidiaries [line items]
Equity | $							$ 43
Proportion of ownership interest (as a percent)	100.00%
Telfisa Global, B.V. Integrated cash management, consulting and financial support for Group companies | Telefónica Latinoamérica Holding, S.L.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	99.99%
Telfisa Global, B.V. Integrated cash management, consulting and financial support for Group companies | Telefónica International Holding, B.V.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	0.01%
Telefónica Global Activities Holding, B.V. Holding Company
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Global Services, GmbH Purchasing services
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Global Roaming, GmbH Optimization of network traffic
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Group 3G UMTS Holding GmbH Holding Company
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Compras Electrónicas, S.L. Development and provision of information Society services
Disclosure of subsidiaries [line items]
Equity	€ 250
Proportion of ownership interest (as a percent)	100.00%
Telefonica Iot & Big Data Tech S.A. Provision of telemarketing services
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefonica Iot & Big Data Tech S.A.
Disclosure of subsidiaries [line items]
Equity	€ 1
Proportion of ownership interest (as a percent)	100.00%
Geprom Software Engineering S.L.
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Geprom Software Engineering S.A.
Disclosure of subsidiaries [line items]
Equity | $					0
Proportion of ownership interest (as a percent)	100.00%
Telfin Ireland
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telfin Ireland DAC. Intragroup financing
Disclosure of subsidiaries [line items]
Equity	€ 8
Proportion of ownership interest (as a percent)	100.00%
TIS Hispanoamerica, S.L.
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Ingeniería de Seguridad, S.A.U. Security services and systems
Disclosure of subsidiaries [line items]
Equity	€ 7
Proportion of ownership interest (as a percent)	100.00%
TIS Hispanoamérica, S.L. Security services and systems
Disclosure of subsidiaries [line items]
Equity	€ 17
Proportion of ownership interest (as a percent)	100.00%
Telefónica Capital, S.A.U. Finance company
Disclosure of subsidiaries [line items]
Equity	€ 16
Proportion of ownership interest (as a percent)	70.00%
Lotca Servicios Integrales, S.L. Aircraft ownership and operation
Disclosure of subsidiaries [line items]
Equity	€ 2
Proportion of ownership interest (as a percent)	100.00%
Fonditel Pensiones, Entidad Gestora de Fondos de Pensiones, S.A Administration of pension funds
Disclosure of subsidiaries [line items]
Equity	€ 7
Proportion of ownership interest (as a percent)	100.00%
Fonditel Gestión, Soc. Gestora de Instituciones de Inversión Colectiva, S.A. Administration and representation of collective investment schemes
Disclosure of subsidiaries [line items]
Equity	€ 3
Proportion of ownership interest (as a percent)	100.00%
Telefónica Investigación y Desarrollo, S.A.U. Telecommunications research activities and projects
Disclosure of subsidiaries [line items]
Equity	€ 15
Proportion of ownership interest (as a percent)	100.00%
Telefonica Seguros y Reaseguros Compañia Aseguradora
Disclosure of subsidiaries [line items]
Equity	€ 24
Proportion of ownership interest (as a percent)	100.00%
Nova Casiopea RE S.A. Reinsurance
Disclosure of subsidiaries [line items]
Equity	€ 3
Proportion of ownership interest (as a percent)	100.00%
Telefónica Seguros y Reaseguros Compañía Aseguradora, S.A.U. Realización de operaciones de seguros directos
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Seguros y Reaseguros Compañía Aseguradora, S.A.U. Realización de operaciones de seguros directos | Telefónica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	16.67%
Telefónica Seguros y Reaseguros Compañía Aseguradora, S.A.U. Realización de operaciones de seguros directos | Telefónica Finanzas, S.A.U. (TELFISA)
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	83.33%
Telefonica Europe, B.V.
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Participaciones, S.A.U. Financial debt instrument issuer
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefonica Emisiones S.A.U.
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Alianca Atlantica Holding B.V.
Disclosure of subsidiaries [line items]
Equity	€ 150
Proportion of ownership interest (as a percent)	87.40%
Alianca Atlantica Holding B.V. | Telefónica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Alianca Atlantica Holding B.V. | Telefônica Brasil, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	37.40%
Telefónica Serviços Empresariais do BRASIL, Ltda.
Disclosure of subsidiaries [line items]
Equity | R$		63
Proportion of ownership interest (as a percent)	100.00%
Telefónica Gestión Integral de Edificios y Servicios S.L.
Disclosure of subsidiaries [line items]
Equity	€ 29
Proportion of ownership interest (as a percent)	100.00%
Tempotel, Empresa de Trabajo Temporal, S.A.
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
O2 Worldwide Limited
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Telefonica Servicios Globales S.L.
Disclosure of subsidiaries [line items]
Equity	€ 1
Proportion of ownership interest (as a percent)	100.00%
Telefonica Holding Atticus, B.V.
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Soluciones de Criptografía, S.A.
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Centroamérica Inversiones ,S.L.
Disclosure of subsidiaries [line items]
Equity	€ 1
Proportion of ownership interest (as a percent)	60.00%
Telefónica Tech S.L.
Disclosure of subsidiaries [line items]
Equity	€ 65
Proportion of ownership interest (as a percent)	100.00%
Telefónica Cybersecurity & Cloud Tech SL.
Disclosure of subsidiaries [line items]
Equity	€ 32
Proportion of ownership interest (as a percent)	100.00%
Telefónica Cybersecurity & Cloud Tech Chile SpA.
Disclosure of subsidiaries [line items]
Equity | $								25,301
Proportion of ownership interest (as a percent)	100.00%
Telefónica Tech Inc.
Disclosure of subsidiaries [line items]
Equity | $						9
Proportion of ownership interest (as a percent)	100.00%
iHackLabs Ltd.
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Audertis Audit Services S.L.
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Govertis Advisory Services S.L.
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefonica Cybersecurity Tech Colombia S.A.S.
Disclosure of subsidiaries [line items]
Equity | $				406
Proportion of ownership interest (as a percent)	100.00%
Telefonica Cybersecurity Tech Mexico, S.A de C.V.
Disclosure of subsidiaries [line items]
Equity | $					48
Proportion of ownership interest (as a percent)	100.00%
Telefônica Cibersegurança e Tecnología do Brasil Ltda
Disclosure of subsidiaries [line items]
Equity | R$		26
Proportion of ownership interest (as a percent)	100.00%
Telefónica Cybersecurity & Cloud Tech Perú S.A.C
Disclosure of subsidiaries [line items]
Equity | S/									30
Proportion of ownership interest (as a percent)	100.00%
Telefonica Cybersecurity Tech Ecuador Tctech S.A.
Disclosure of subsidiaries [line items]
Equity | $						0
Proportion of ownership interest (as a percent)	100.00%
Telefonica Cybersecurity Tech Ecuador Tctech S.A. | Otecel, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	99.00%
Telefonica Cybersecurity Tech Ecuador Tctech S.A. | Telefonica Global Solutions Ecuador TGSE, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	1.00%
Telefonica Cybersecurity & Cloud Tech Deutschland GmbH
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Cybersecurity & Cloud Tech Deutschland GmbH Cybersecurity, electronic information security and IT consulting
Disclosure of subsidiaries [line items]
Equity	€ 2
Proportion of ownership interest (as a percent)	100.00%
Altostratus Solutions, S.L.
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefónica Tech UK & Ireland
Disclosure of subsidiaries [line items]
Equity | £											14
Proportion of ownership interest (as a percent)	100.00%
Telefonica Tech UK Holdings Limited
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Telefonica Tech UK TOG Limited
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Telefonica Tech UK Managed Services Limited
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Telefonica Tech UK Limited
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Telefonica Tech Northern Ireland Holdings Limited
Disclosure of subsidiaries [line items]
Equity | £											1
Proportion of ownership interest (as a percent)	100.00%
Telefonica Tech Communication & Collaboration Limited
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Telefonica Tech Northern Ireland Limited
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Telefonica Tech Ireland Limited
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Telefonica Tech Ocean Limited
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Perpetual Topco Limited
Disclosure of subsidiaries [line items]
Equity | £											4
Proportion of ownership interest (as a percent)	100.00%
Perpetual Midco Limited
Disclosure of subsidiaries [line items]
Equity | £											4
Proportion of ownership interest (as a percent)	100.00%
Perpetual Bidco Limited
Disclosure of subsidiaries [line items]
Equity | £											3
Proportion of ownership interest (as a percent)	100.00%
Incremental Group Holdings Limited
Disclosure of subsidiaries [line items]
Equity | £											1
Proportion of ownership interest (as a percent)	100.00%
Redspire Limited
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Incremental Group Limited
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Adatis Group Limited
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Adatis Consulting Limited
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Adatis BG LTD
Disclosure of subsidiaries [line items]
Equity | лв												лв 0
Proportion of ownership interest (as a percent)	100.00%
Adatis India Private Limited
Disclosure of subsidiaries [line items]
Equity | ₨													₨ 0
Proportion of ownership interest (as a percent)	100.00%
Adatis India Private Limited | Adatis Group Limited
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	99.00%
Adatis India Private Limited | Adatis Consulting Limited
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	1.00%
Kumo Analytics Limited
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
Adatis Managed Services Limited
Disclosure of subsidiaries [line items]
Equity | £											0
Proportion of ownership interest (as a percent)	100.00%
BE-terna Acceleration Holding GmbH
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna Acceleration GmbH
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna Enhancement GmbH
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna Germany GmbH
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna AB (Sweden)
Disclosure of subsidiaries [line items]
Equity | kr														kr 0
Proportion of ownership interest (as a percent)	100.00%
Boydak Automation AG
Disclosure of subsidiaries [line items]
Equity | SFr															SFr 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna ApS (Denmark)
Disclosure of subsidiaries [line items]
Equity | kr																kr 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna B.V. (Netherlands)
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna GmbH (Leipzig)
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna Austria GmbH
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna GmbH (Innsbruck)
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
Pipol A/S
Disclosure of subsidiaries [line items]
Equity | kr																kr 1
Proportion of ownership interest (as a percent)	100.00%
BE-terna A/S (Norway)
Disclosure of subsidiaries [line items]
Equity | kr																	kr 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna Business Solutions GmbH
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna Industry Solutions GmbH
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna AG (Switzerland)
Disclosure of subsidiaries [line items]
Equity | SFr															SFr 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna Adriatic
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna Belgrade (Serbia)
Disclosure of subsidiaries [line items]
Equity | дин																		дин 13
Proportion of ownership interest (as a percent)	100.00%
BE-terna Ljubijana (Slovenia)
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	100.00%
BE-terna Zagreb (Croatia)
Disclosure of subsidiaries [line items]
Equity | kn																			kn 2
Proportion of ownership interest (as a percent)	100.00%
Pontel Participaciones, S.L. Holding company
Disclosure of subsidiaries [line items]
Equity	€ 0
Proportion of ownership interest (as a percent)	83.35%
Telxius Telecom, S.A.
Disclosure of subsidiaries [line items]
Equity	€ 260
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable América, S.A.
Disclosure of subsidiaries [line items]
Equity | $						417
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable España, S.L.U.
Disclosure of subsidiaries [line items]
Equity	€ 5
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable República Dominicana, S.A.S.
Disclosure of subsidiaries [line items]
Equity | $						6
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable República Dominicana, S.A.S. | Telxius Cable América, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	49.51%
Telxius Cable República Dominicana, S.A.S. | Telxius Cable España, S.L.U.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	0.50%
Telxius Cable Argentina, S.A.
Disclosure of subsidiaries [line items]
Equity | $						78
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable Argentina, S.A. | Telxius Cable América, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	49.98%
Telxius Cable Argentina, S.A. | Telxius Cable España, S.L.U.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	0.03%
Telxius Cable Panamá, S.A. Installation and operation of telecommunications networks for wholesalers
Disclosure of subsidiaries [line items]
Equity | $						10
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable Puerto Rico, Inc. High capacity optical fibre network communications services
Disclosure of subsidiaries [line items]
Equity | $						14
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable USA, Inc. High bandwidth communications services
Disclosure of subsidiaries [line items]
Equity | $						58
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable Ecuador, S.A. Sale of usage of data transmission capacity via an underwater optical fibre network
Disclosure of subsidiaries [line items]
Equity | $						5
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable Chile S.A. [Member]
Disclosure of subsidiaries [line items]
Equity | $						37
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable Guatemala, S.A.
Disclosure of subsidiaries [line items]
Equity | $						20
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable Perú, S.A.C.
Disclosure of subsidiaries [line items]
Equity | $						20
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable Colombia, S.A. Supply of data transmission capacity via underwater cable system
Disclosure of subsidiaries [line items]
Equity | $						4
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable Colombia, S.A. Supply of data transmission capacity via underwater cable system | Telxius Cable América, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	47.50%
Telxius Cable Colombia, S.A. Supply of data transmission capacity via underwater cable system | Telxius Cable Chile S.A. [Member]
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	0.83%
Telxius Cable Colombia, S.A. Supply of data transmission capacity via underwater cable system | Telxius Cable Perú, S.A.C.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	0.84%
Telxius Cable Colombia, S.A. Supply of data transmission capacity via underwater cable system | Telxius Cable Guatemala, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	0.83%
Telxius Cable Colombia, S.A. Supply of data transmission capacity via underwater cable system | Telxius Cable Argentina, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	0.01%
Telxius Cable Brasil Participaçoes, Ltda. Holding company
Disclosure of subsidiaries [line items]
Equity | $						62
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable Brasil, Ltda. Operation and deployment of telecommunications infrastructure
Disclosure of subsidiaries [line items]
Equity | $						74
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable Bolivia, S.A. Establishment and operation of any kind of communications infrastructure and/or network
Disclosure of subsidiaries [line items]
Equity | $						4
Proportion of ownership interest (as a percent)	50.01%
Telxius Cable Bolivia, S.A. Establishment and operation of any kind of communications infrastructure and/or network | Telxius Cable América, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	49.01%
Telxius Cable Bolivia, S.A. Establishment and operation of any kind of communications infrastructure and/or network | Telxius Cable España, S.L.U.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	0.50%
Telxius Cable Bolivia, S.A. Establishment and operation of any kind of communications infrastructure and/or network | Telxius Cable Argentina, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	0.50%
VMO2
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method | £											0
FiBrasil Infraestructura e Fibra Ótica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	43.70%
Investments accounted for by the equity method | R$		2
FiBrasil Infraestructura e Fibra Ótica, S.A. | Telefónica Infra, S.L.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	25.00%
FiBrasil Infraestructura e Fibra Ótica, S.A. | Telefónica Brasil, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	18.70%
VivaE Educação Digital S.A
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	37.40%
Investments accounted for by the equity method | R$		1
HoldCo infraCo SpA
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	39.74%
Investments accounted for by the equity method | $								25,067
InfraCo, SpA
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	39.74%
Investments accounted for by the equity method | $								25,067
Telefónica Factoring España, S.A. Factoring
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method	€ 5
Telefónica Factoring Do Brasil, Ltd. Factoring services provider
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method | R$		R$ 5
Telefónica Factoring Do Brasil, Ltd. Factoring services provider | Telefónica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	40.00%
Telefónica Factoring Do Brasil, Ltd. Factoring services provider | Telefónica Factoring España, S.A. Factoring
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	10.00%
Telefónica Factoring Mexico, S.A. de C.V. SOFOM ENR Factoring services provider
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method | $					$ 34
Telefónica Factoring Mexico, S.A. de C.V. SOFOM ENR Factoring services provider | Telefónica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	40.50%
Telefónica Factoring Mexico, S.A. de C.V. SOFOM ENR Factoring services provider | Telefónica Factoring España, S.A. Factoring
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	9.50%
Telefónica Factoring Perú, S.A.C. Factoring services provider
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method | S/									6
Telefónica Factoring Perú, S.A.C. Factoring services provider | Telefónica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	40.50%
Telefónica Factoring Perú, S.A.C. Factoring services provider | Telefónica Factoring España, S.A. Factoring
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	9.50%
Telefónica Factoring Colombia, S.A. Factoring services provider
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method | $				4,000
Telefónica Factoring Colombia, S.A. Factoring services provider | Telefónica, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	40.50%
Telefónica Factoring Colombia, S.A. Factoring services provider | Telefónica Factoring España, S.A. Factoring
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	9.50%
Telefónica Factoring Chile, SpA. Factoring services provider
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method | $								$ 547
Mobile Financial Services Holding SPRL Financial services
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method | $						$ 198
Mobile Financial Services Holding SPRL Financial services | Telefonica Internacional Holding, B.V
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	26.28%
Mobile Financial Services Holding SPRL Financial services | Telefonica Holding Atticus, B.V
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	23.72%
Telefónica Consumer Finance, Establecimiento Financiero de Crédito, S.A. Specialised credit institution
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method	€ 5
Movistar Consumer Finance Colombia SAS.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method | $				6,000
Alamo HoldCo S.L.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	27.00%
Investments accounted for by the equity method	€ 0
Onnet Fibra Colombia S.A.S.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	27.00%
Investments accounted for by the equity method | $				$ 45,852
The Smart Steps Data Technology Company
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	37.50%
Investments accounted for by the equity method | ¥																				¥ 0
Internet para todos S.A.C
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	54.09%
Investments accounted for by the equity method | S/									S/ 364
Movistar Prosegur Alarmas
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method	€ 0
Prosegur Soluciones S.A.U.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method	€ 0
Buendía Producción, S.L.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method	€ 0
Buendía Estudios, S.L. Service provision related to film and video production activities
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method	€ 0
Buendia Estudios Uno, S.L.U.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method	€ 0
Buendia Estudios Dos, S.L.U.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method	€ 0
Buendía Estudios Canarias S.L.U.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method	€ 0
Buendia Estudios Bizkaia, S.L.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method	€ 0
UGG TopCo/HoldCo General Partner GmbH.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	47.06%
Investments accounted for by the equity method	€ 0
UGG TopCo/HoldCo General Partner GmbH. | Telefónica Deutschland Holding A.G.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	7.06%
UGG TopCo/HoldCo General Partner GmbH. | Telefónica Infra Germany GmbH
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	40.00%
UGG TopCo GmbH & Co KG
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	47.06%
Investments accounted for by the equity method	€ 0
UGG TopCo GmbH & Co KG | Telefónica Deutschland Holding A.G.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	7.06%
UGG TopCo GmbH & Co KG | Telefónica Infra Germany GmbH
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	40.00%
UGG HoldCo GmbH& Co KG
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	47.06%
Investments accounted for by the equity method	€ 0
UGG General Partner GmbH
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	47.06%
Investments accounted for by the equity method	€ 0
Unsere Grüne Glasfaser
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	47.06%
Investments accounted for by the equity method	€ 0
Daytona Midco SL.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	20.00%
Investments accounted for by the equity method	€ 4
Digital Data Centre BidCo, SLU.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	20.00%
Investments accounted for by the equity method	€ 4
Telefonica Renting, S.A.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method	€ 0
Opal Jvco Limited (nexfibre)
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	25.00%
Investments accounted for by the equity method | £											0
Solar360 de Repsol y Movistar S.L.
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method	€ 0
Opal Holdco Limited
Disclosure of subsidiaries [line items]
Proportion of ownership interest (as a percent)	50.00%
Investments accounted for by the equity method | £											£ 0

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_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of residual interest in the assets of the entity after deducting all its liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 1
-IssueDate 2022-03-24
-Paragraph 24
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2022-en-r&anchor=para_24_a&doctype=Standard
-URIDate 2022-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 1
-IssueDate 2022-03-24
-Paragraph 32
-Subparagraph a
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2022-en-r&anchor=para_32_a_i&doctype=Standard
-URIDate 2022-03-24

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2022-03-24
-Paragraph 93
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_a&doctype=Standard
-URIDate 2022-03-24

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2022-03-24
-Paragraph 93
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_b&doctype=Standard
-URIDate 2022-03-24

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2022-03-24
-Paragraph 93
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_e&doctype=Standard
-URIDate 2022-03-24

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard
-URIDate 2022-03-24

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 78
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_78_e&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_Equity
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2022-03-24
-Paragraph 24
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2022-en-r&anchor=para_24_a&doctype=Standard
-URIDate 2022-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 54
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_54_e&doctype=Standard
-URIDate 2022-03-24

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2022-03-24
-Paragraph B16
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2022-en-r&anchor=para_B16&doctype=Appendix&subtype=B
-URIDate 2022-03-24

+ Details

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

X

- Definition

The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2022-03-24
-Paragraph 17
-Subparagraph b
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2022-en-r&anchor=para_17_b_iii&doctype=Standard
-URIDate 2022-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2022-03-24
-Paragraph 16
-Subparagraph b
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2022-en-r&anchor=para_16_b_iii&doctype=Standard
-URIDate 2022-03-24

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2022-03-24
-Paragraph 19B
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2022-en-r&anchor=para_19B_c&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_ProportionOfOwnershipInterestInSubsidiary
Namespace Prefix:	ifrs-full_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicadeEspanaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaMovilesEspanaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TeleinformaticayComunicacionesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaSolucionesdeInformaticayCom.deEspanaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaSolucionesdeOutsourcingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaServiciosIntegralesdeDistribucionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicadeContenidosS.A.U.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaServiciosAudiovisualesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaBroadcastServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TBSCBarcelonaProduccionesSLUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaAudiovisualDigitalSLUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaGlobalTechnologyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaEducacionDigitalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BlueviaFibraSLUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaEspanaFilialesSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaInfraSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_Solar360SolucionesDeInstalacionYMantenimientoSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaDeutschlandHoldingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaGermanyHoldingsLimitedMember
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:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaGermanyGmbHCoOHGMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaDeutschlandHoldingAGMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TGermanyManagementGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_EPlusMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaGermanyNextGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_O2TelefonicaDeutschlandFinanzierungsGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaBrazilMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaLatinoamericaHoldingSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaChileSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TerraNetworksBrasilMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaInfrastructuraeSegurancaBrasilLtdaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_GarliavaRJInfraestruturaERedesDeTelecomunicacoesSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_VivoVenturesFundoDeInvestimentoEmParticipacoesMultiestrategiaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaBrasilSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaOpenInnovationSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_VitaITComercioEServicosDeSolucoesEmTILtdaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaHispanoamericaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TLHHoldcoSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaVenezolanaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaHispanoamericaSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_ComtelComunicacionesTelefonicasSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_ColombiaTelecomunicacionesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_OperacionesTecnologicasyComercialesS.A.S.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_PegasoPcsSADeCVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_CelularDeTelefoniaSADeCVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TerraNetworksMexicoS.A.deC.V.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_FisatelMexicoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_PegasoPcsSADeCVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_OtecelMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicadeArgentinaSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaMovilesArgentinaSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TLHHoldcoSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaMovilesArgentinaS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaMovilesChileS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_InversionesTelefonicaInternacionalHoldingSpAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaChileS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaChileHoldingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicadelPeruSAAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_MediaNetworksLatinAmericaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaMovilesdelUruguaySAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaInfraSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaInfraGermanyGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaO2HoldingsLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaCapitalSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_MM02PlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_O2InternationalHoldingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_O2NetherlandsHoldingsBVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaGermanyHoldingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_O2EuropeLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaInternationalHoldingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaLatinoamericaHoldingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaGlobalSolutionsSLUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaGlobalSolutionsUSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaGlobalSolutionsGermanyGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaGlobalSolutionsMexicoSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaDigitalEspanaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaDigitalLtd.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaOpenInnovationSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_WayraChileTechnologiaeInnovacionLimitadaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_WayraBrasilAceleradoradeProjetosLtdaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_WYTelecomMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_WayraArgentinaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_WayraColombiaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_ProyectoWayraMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_WayraPeruAceleradoradeProyectosMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_WayraUKMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TerraNetworksPeruS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TerraNetworksArgentinaS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaInternationalHoldingBVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelfisaGlobalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaGlobalActivitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaGlobalServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaGlobalRoamingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_Group3GUMTSHoldingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaComprasElectronicasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaIotBigDataTechSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_GepromSoftwareEngineeringSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_GepromSoftwareEngineeringSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelfinIrelandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaIngenieriadeSeguridadMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TISHispanoamericaSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaCapitalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_LotcaServiciosIntegralesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_FonditelPensionesEntidadGestoradeFondosdePensionesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_FonditelGestionSoc.GestoradeInstitucionesdeInversionColectivaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaInvestigacionyDesarrolloMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaLuxembourgHoldingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_NovaCasiopeaREMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaSegurosYReasegurosCompaniaAseguradoraMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaFinanzasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaCorreduriaDeSegurosYReasegurosCompaniaDeMediacionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaFinanzasSAUTELFISAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaEuropeB.V.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaParticipacionesS.A.U.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaEmisionesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_AliancaAtlanticaHoldingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaServicosEmpresarialsdoBRASILLtdaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaGestionIntegraldeEdificiosyServiciosMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TempotelEmpresadeTrabajoTemporalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_O2WorldwideLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaServiciosGlobalesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaHoldingAtticusMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaSolucionesdeCriptografiaS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaCentroamericaInversionesS.L.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaTechSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefnicaCybersecurityCloudTechSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaCybersecurityCloudTechChileSpAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefnicaTechIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_IHackLabsLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_AudertisAuditServicesSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_GovertisAdvisoryServicesSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaCybersecurityTechColombiaSASMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaCybersecurityTechMexicoSADeCVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaCibersegurancaETecnologiaDoBrasilLtdaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaCybersecurityTechPerSACMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaCybersecurityTechEcuadorTctechSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_OtecelSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaGlobalSolutionsEcuadorTGSESAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaCybersecurityCloudTechDeutschlandGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_AcensTechnologiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_AltostratusSolutionsSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaTechUKIrelandLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaTechUKHoldingsLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaTechUKTOGLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaTechUKManagedServicesLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaTechUKLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaTechNorthernIrelandHoldingsLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaTechCommunicationCollaborationLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaTechNorthernIrelandLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaTechIrelandLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaTechOceanLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_PerpetualTopcoLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_PerpetualMidcoLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_PerpetualBidcoLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_IncrementalGroupHoldingsLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_RedspireLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_IncrementalGroupLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_AdatisGroupLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_AdatisConsultingLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_AdatisBGLTDMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_AdatisIndiaPrivateLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_AdatisGroupLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_AdatisConsultingLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_KumoAnalyticsLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_AdatisManagedServicesLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaAccelerationHoldingGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaAccelerationGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaEnhancementGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaGermanyGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaABSwedenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BoydakAutomationAGMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaApSDenmarkMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaBVNetherlandsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaGmbHLeipzigMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaAustriaGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaGmbHInnsbruckMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_PipolASMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaASNorwayMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaBusinessSolutionsGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaIndustrySolutionsGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaAGSwitzerlandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaAdriaticMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaBelgradeSerbiaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaLjubijanaSloveniaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BETernaZagrebCroatiaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_PontelParticipacionesSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusTelecomSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCableAmericaS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCableEspanaSLUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCableRepublicaDominicanaS.A.S.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	dei_LegalEntityAxis=tef_TelxiusCableEspanaSLUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCableArgentinaS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCablePanamaS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCablePuertoRicoInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCableUSAInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCableEcuadorS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCableChileS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCableGuatemalaS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCablePeruS.A.C.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCableColombiaS.A.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCableBrasilParticipacoesLtda.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCableBrasilLtda.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelxiusCableBoliviaSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_FiBrasilInfraestructuraEFibraOticaSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_VivaEEducacaoDigitalSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_HoldCoInfraCoSpAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_InfraCoSpAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaFactoringEspanaSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaFactoringDoBrasilLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaFactoringEspanaSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaFactoringMexicoSAdeCVSOFOMENRMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaFactoringPeruSACMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaFactoringColombiaSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaFactoringChileSpAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_MobileFinancialServicesHoldingSPRLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaInternacionalHoldingBVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaHoldingAtticusBVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaConsumerFinanceEstablecimientoFinancierodeCreditoSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_MovistarConsumerFinanceColombiaSASMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_AlamoHoldCoSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_OnnetFibraColombiaSASMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TheSmartStepsDataTechnologyCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_InternetParaTodosSACMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_ProsegurAlarmasEspaaSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_ProsegurSolucionesSAUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BuendiaProduccionSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BuendiaEstudiosSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BuendiaEstudiosUnoSLUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BuendiaEstudiosDosSLUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BuendiaEstudiosCanariasSLUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_BuendiaEstudiosBizkaiaSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_UGGTopCoHoldCoGeneralPartnerGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=tef_TelefonicaInfraGermanyGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_UGGTopCoGmbHCoKGMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_UGGHoldCoGmbHCoKGMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_UGGGeneralPartnerGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_UnsereGrneGlasfaserGmbHCoKGMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_DaytonaMidcoSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_DigitalDataCentreBidCoSLUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_TelefonicaRentingSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_OpalJvcoLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_Solar360DeRepsolYMovistarSLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tef_OpalHoldcoLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: