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Related Parties - Narrative (Details) - EUR (€) |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 07, 2022 | Jul. 21, 2022 | Jan. 05, 2021 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of transactions between related parties [line items] |  |  |  |  |
Unearned premiums |  |  |  | € 6,598,467 | € 5,303,931
Telefónica Consumer Finance, Establecimiento Financiero de Crédito, S.A. Specialised credit institution |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Proportion of voting rights held in subsidiary (as a percent) |  |  |  | 50.00% |
Telefónica Factoring España, S.A. Factoring |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Proportion of voting rights held in subsidiary (as a percent) |  |  |  | 50.00% |
Telefonica Renting, S.A. |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Proportion of voting rights held in subsidiary (as a percent) |  | 50.00% |  |  |
Adquira España, S.A. |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Proportion of ownership interest in joint venture (as a percent) |  |  |  | 44.44% |
CaixaBank |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Guarantees |  |  |  | € 160,000,000 | 190,000,000
Purchase of goods |  |  |  | 53,000,000 | 57,000,000
Purchase of assets |  |  |  | 82,000,000 | 92,000,000
Expense recognised during period for bad and doubtful debts for related party transaction |  |  |  | 3,000,000 | 1,000,000
Outstanding commitments made by entity, related party transactions |  |  |  | 119,000,000 | 73,000,000
CaixaBank | Derivative instruments |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Credit derivative, fair value |  |  |  | 41,000,000 | 26,000,000
Nominal amount of hedging instrument |  |  |  | 264,000,000 | 264,000,000
Guarantees |  |  |  | 43,000,000 | 21,000,000
CaixaBank | Movistar Fusion & Terminal |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Purchase of goods |  |  |  | 405,000,000 | 186,000,000
Expense recognised during period for bad and doubtful debts for related party transaction |  |  |  | 19,000,000 |
Outstanding commitments made by entity, related party transactions |  |  |  | € 501,000,000 | € 176,000,000
BBVA |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Significant shareholder stake of the Company (as a percent) |  |  |  | 0.73% | 0.66%
Guarantees |  |  |  | € 165,000,000 | € 147,000,000
Purchase of goods |  |  |  | 0 | 2,000,000
BBVA | Derivative instruments |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Credit derivative, fair value |  |  |  | 185,000,000 | 314,000,000
Nominal amount of hedging instrument |  |  |  | 5,778,000,000 | 6,664,000,000
Guarantees |  |  |  | € 236,000,000 | € 262,000,000
Banco Bilbao Vizcaya Argentaria And Caixabank | Derivative instruments |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Credit Derivatives, To Total , Percentage |  |  |  | 7.00% |
CaixaBank |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Significant shareholder stake of the Company (as a percent) |  |  |  | 3.50% |
BBVA |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Significant shareholder stake of the Company (as a percent) |  |  |  | 4.87% |
Proportion of ownership shares held |  |  |  | 4.97% |
BBVA | Adquira España, S.A. |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Proportion of ownership interest in joint venture (as a percent) |  |  |  | 44.44% |
Blackrock inc. |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Significant shareholder stake of the Company (as a percent) | 4.49% |  |  | 4.48% |
Proportion of ownership shares held | 4.96% |  |  |  |
Telefónica Digital Ltd. Developer Telco Services | Movistar Consumer Finance Colombia SAS. |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |
Proportion of voting rights held in joint venture |  |  | 5000.00% |  |

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