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Property, Plant and Equipment - Narrative (Details) € in Millions, premise in Millions, home in Millions |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 15, 2022 home | Dec. 31, 2022 EUR (€) premise | Dec. 31, 2021 EUR (€) center | Jul. 21, 2021 center | May 07, 2021 center
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Investments in property, plant and equipment |  | € 4,289 | € 3,880 |  |
Number of premises covered by fiber optic roll out | home | 5 |  |  |  |
5G network population coverage (in percentage) |  | 85.00% |  |  |
Impairment loss recognised in other comprehensive income, property, plant and equipment |  | € 59 | 5 |  |
Acquisitions through business combinations, property, plant and equipment |  | 37 | 15 |  |
Transfers and others |  | (209) | (416) |  |
Decrease through loss of control of subsidiary, property, plant and equipment |  |  | € 383 |  |
Telefónica Infra, S.L. | Asterion Industrial Partners SGEIC |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Number of data centers sold | center |  |  |  |  | 4
Telefónica Infra, S.L. | Asterion Industrial Partners SGEIC | Spain |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Number of data centers sold | center |  |  | 2 | 2 | 2
Telefónica Spain |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Investments in property, plant and equipment |  | € 1,288 | € 1,155 |  |
Number of premises covered by fiber optic roll out | premise |  | 28.0 |  |  |
Telefónica United Kingdom |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Investments in property, plant and equipment |  |  | 366 |  |
Transfers and others |  |  | 70 |  |
Telefónica Germany |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Investments in property, plant and equipment |  | € 854 | 913 |  |
Population coverage by 5G networks (in percentage) |  | 80.00% |  |  |
Telefónica Brazil |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Investments in property, plant and equipment |  | € 1,277 | 1,049 |  |
Population covered in 4G network (in percentage) |  | 96.00% |  |  |
Number of premises covered by FTTH network | premise |  | 23.3 |  |  |
Telefónica Hispam |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Investments in property, plant and equipment |  | € 732 | 680 |  |
Telefónica México |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Increase (decrease) in depreciation, property, plant and equipment |  | 8 | 47 |  |
Telxius Group |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Transfers and others |  |  | 53 |  |
Telefónica Argentina |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Impairment loss recognised in other comprehensive income, property, plant and equipment |  | 56 |  |  |
Cancom Ltd. |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Acquisitions through business combinations, property, plant and equipment |  |  | 15 |  |
InfraCo, SpA |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Decrease through loss of control of subsidiary, property, plant and equipment |  |  | 158 |  |
Telefónica Germany |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Decrease through loss of control of subsidiary, property, plant and equipment |  |  | 126 |  |
Oi Group |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Acquisitions through business combinations, property, plant and equipment |  | 29 |  |  |
Incremental |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Acquisitions through business combinations, property, plant and equipment |  | 1 |  |  |
BE-terna |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Acquisitions through business combinations, property, plant and equipment |  | € 6 |  |  |
Deferred collection sale of T. Ireland | InfraCo, SpA |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Decrease through loss of control of subsidiary, property, plant and equipment |  |  | 36 |  |
Deferred collection sale of T. Ireland | Telefónica Germany |  |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |  |
Decrease through loss of control of subsidiary, property, plant and equipment |  |  | € 63 |  |

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