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Associates and Joint Ventures - Statement of Financial Position and IS of Associates and Joint Ventures Narrative (Details) € in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 EUR (€) | Dec. 31, 2023 EUR (€) | Dec. 31, 2022 EUR (€) | Dec. 14, 2023
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Current payables to related parties | € 407 | € 203 |  |
Revenues | 41,315 | 40,652 | € 39,993 |
HoldCo Infraco SpA. (Onnet Fibra Chile) |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Expenses from operations with associates and joint ventures | 103 | 144 | 121 |
Telefónica Renting, S.A. |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Non-current payables and other liabilities (Note 21) | 433 | 235 |  |
Current payables to related parties | 217 | 85 |  |
Revenues | 373 | 243 |  |
Expenses from operations | 455 | 392 |  |
HoldCo infraCo SpA |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Revenue from operations with associates and joint ventures | 28 | 63 | € 88 |
Onnet Fibra Colombia S.A.S. |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Revenue from operations with associates and joint ventures | 98 | 140 |  |
Expenses from operations with associates and joint ventures | 81 | 60 |  |
Colombia Telecomunicaciones, S.A., ESP | Loans and receivables | Alamo HoldCo S.L. and Onnet Fibra Colombia SAS |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Credits and other financial assets | 112 | 112 |  |
Colombia Telecomunicaciones, S.A., ESP | Trade receivables | Alamo HoldCo S.L. and Onnet Fibra Colombia SAS |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Credits and other financial assets | 14 | 29 |  |
Telefónica Chile, S.A. Local and international long distance telephony services provider | HoldCo Infraco SpA. (Onnet Fibra Chile) |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Credits and other financial assets | € 118 | 121 |  |
Proportion of ownership interest in joint venture, disposal | 0.40 |  |  | 0.40
Telefónica Chile, S.A. Local and international long distance telephony services provider | Loans and receivables | HoldCo Infraco SpA. (Onnet Fibra Chile) |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Credits and other financial assets | € 75 | 75 |  |
Telefónica Chile, S.A. Local and international long distance telephony services provider | Indefinite term loans | HoldCo Infraco SpA. (Onnet Fibra Chile) |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Credits and other financial assets | € 43 | € 46 |  |

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