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Associates and Joint Ventures - Narrative (Details) € in Millions, £ in Millions, premise in Millions, home in Millions, R$ in Millions, $ in Millions |  |  |  |  |  |  |  |  | 1 Months Ended | 7 Months Ended | 12 Months Ended | 31 Months Ended |  |  |  |
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Dec. 31, 2022 EUR (€) | Dec. 31, 2022 GBP (£) | Dec. 15, 2022 home | Sep. 30, 2022 EUR (€) | Sep. 30, 2022 GBP (£) | Jul. 29, 2022 | Jun. 30, 2022 EUR (€) | Jun. 30, 2022 GBP (£) | Jan. 12, 2022 EUR (€) | Jan. 12, 2022 USD ($) | Dec. 31, 2021 EUR (€) | Jul. 02, 2021 EUR (€) | Jul. 02, 2021 BRL (R$) | Dec. 31, 2021 EUR (€) | Dec. 31, 2021 GBP (£) | Jul. 31, 2021 EUR (€) | Dec. 31, 2021 EUR (€) | Dec. 31, 2023 | Dec. 31, 2022 EUR (€) city premise | Dec. 31, 2022 GBP (£) city premise | Dec. 31, 2021 EUR (€) | Dec. 31, 2021 GBP (£) | Dec. 31, 2020 EUR (€) | Dec. 31, 2023 | May 24, 2022 | Jan. 11, 2022 | Dec. 31, 2021 GBP (£) | Jul. 01, 2021
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 73 |  |  |  |  |  |  |
Gains (losses) on remeasurements of defined benefit plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 70 |  | € 487 |  | € 33 |  |  |  |  |
Valuation assumption, discount rate (in percentage) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.30% | 7.30% | 6.90% | 6.90% |  |  |  |  |  |
Valuation assumption, perpetuity growth rate (in percentage) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00% | 1.00% |  |  |  |  |  |  |  |
Valuation assumption, weighted average cost of capital, increase (decrease) | 0.18% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.18% |  |  |  |  |  |  |  |  |
Valuation assumption, perpetuity growth rate, increase (decrease) | (0.22%) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (0.22%) |  |  |  |  |  |  |  |  |
Valuation assumption, increase (decrease) in EBITDA margin | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |
Valuation assumption, increase (decrease) in long term investment ratio | 1.10% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.10% |  |  |  |  |  |  |  |  |
Number of premises covered by fiber optic roll out | home |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of additional possible premises covered by fiber optic | home |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 39,993 |  | € 39,277 |  | 43,076 |  |  |  |  |
Daytona Midco SL. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 81 |  |  |  |  |  |  |  |  |  |  |  |
Proportion of voting equity transferred (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13.94% |  |  |  |  |  |  |  |  |  |  |  |
InfraCo, SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expenses from operations with associates and joint ventures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 121 |  | 50 |  |  |  |  |  |  |
Alamo HoldCo S.L. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from operations with associates and joint ventures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 88 |  | € 52 |  |  |  |  |  |  |
Expenses from operations with associates and joint ventures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 39 |  |  |  |  |  |  |  |  |
Onnet Fibra Colombia S.A.S. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from operations with associates and joint ventures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 97 |  |  |  |  |  |  |  |  |
Telefónica Chile, S.A. | InfraCo, SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture, disposal |  |  |  |  |  |  |  |  |  |  | 0.40 |  |  | 0.40 |  |  | 0.40 |  |  |  | 0.40 |  |  |  |  |  | 0.40 |
Telefónica Chile, S.A. | InfraCo, SpA | Loans and receivables, category [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term credits to associates and joint ventures | € 75 |  |  |  |  |  |  |  |  |  | € 87 |  |  | € 87 |  |  | € 87 |  | 75 |  | € 87 |  |  |  |  |  |  |
Telefonica Colombia | KKR Alameda Aggregator L.P. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration received |  |  |  |  |  |  |  |  | € 165 | $ 187 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Colombia Telecomunicaciones, S.A., ESP | Alamo HoldCo S.L. and Onnet Fibra Colombia SAS | Loans and receivables, category [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term credits to associates and joint ventures | 82 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 82 |  |  |  |  |  |  |  |  |
Colombia Telecomunicaciones, S.A., ESP | Alamo HoldCo S.L. and Onnet Fibra Colombia SAS | Trade receivables |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term credits to associates and joint ventures | 59 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 59 |  |  |  |  |  |  |  |  |
Colombia Telecomunicaciones, S.A., ESP | Onnet Fibra Colombia S.A.S. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term contractual liabilities to associates and joint ventures | 82 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 82 |  |  |  |  |  |  |  |  |
InfraCo, SpA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 75 |  |  |  |  |  |  |  |  |  |  |  |
Proportion of voting equity transferred (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00% |  |  |  |  |  |  |  |  |  |  |  |
InfraCo, SpA | Telefónica Chile, S.A. | KKR Alameda Aggregator L.P. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of voting equity transferred (as a percent) |  |  |  |  |  |  |  |  |  |  | 60.00% |  |  | 60.00% |  |  | 60.00% |  |  |  | 60.00% |  |  |  |  |  | 60.00% | 60.00%
Prosegur Soluciones S.A.U. | Movistar Prosegur Alarmas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00% | 50.00% | 50.00% |  |  |  |  |  |
Proportion of ownership interest in equity method investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Alamo HoldCo S.L. | Telefonica Colombia | KKR Alameda Aggregator L.P. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration received | $ |  |  |  |  |  |  |  |  |  | $ 28 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gains (losses) on disposals of property, plant and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 162 |  |  |  |  |  |  |  |  |
Proportion of share capital acquired (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |
Daytona Midco SL. | Telefonica Indra, S.L. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 41 |  |  |  |  |  |  |  |  |
Daytona Midco SL. | Telefonica Indra, S.L. | Asterion Industrial Partners SGEIC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of share capital acquired (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20.00% |  |  |
Unsere Grüne Glasfaser |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50 |  | € 27 |  |  |  |  |  |  |
Unsere Grüne Glasfaser | Derivative instruments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gains (losses) on exchange differences on translation of foreign operations, net of tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 69 |  |  |  |  |  |  |  |  |
VMO2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gains (losses) on exchange differences on translation of foreign operations, net of tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 627 |  |  |  |  |  |  |  |  |
Gains (losses) on remeasurements of defined benefit plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 106 |  |  |  |  |  |  |  |  |
Forecast | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valuation assumption, revenue growth rate (in percentage) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |
Valuation assumption, EBITDA margin (in percentage) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36.00% |  |  |  |
Valuation assumption, long-term capital expenditure ratio (in percentage) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16.00% |  |  |  |
Forecast | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Valuation assumption, revenue growth rate (in percentage) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.00% |  |  |  |
Valuation assumption, EBITDA margin (in percentage) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |
Valuation assumption, long-term capital expenditure ratio (in percentage) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 22.00% |  |  |  |
Opal Jvco Limited (nexfibre) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture (as a percent) |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  | 25.00% | 25.00% |  |  |  |  |  |  |  |
Opal Jvco Limited (nexfibre) | InfraVia Capital Partners |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture (as a percent) |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
VMO2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 12,012 |  |  |  |  |  |  |
Proportion of ownership interest in joint venture (as a percent) |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  | 50.00% |  | 50.00% | 50.00% | 50.00% | 50.00% |  |  |  |  |  |
Dividends received from joint ventures, classified as investing activities | 439 | £ 385 |  | € 324 | £ 290 |  | € 146 | £ 125 |  |  |  |  |  | € 187 | £ 161 |  |  |  | € 909 | £ 800 | € 187 | £ 161 |  |  |  |  |  |
Number of premises passed | premise |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16.1 | 16.1 |  |  |  |  |  |  |  |
Number of cities with 5G network | city |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,600 | 1,600 |  |  |  |  |  |  |  |
Commitments in relation to joint ventures | € 6,877 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 6,877 |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 7,223 |  | € 12,155 |  |  |  |  |  |  |  |  |
VMO2 | O2 Holdings Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commitments in relation to joint ventures |  |  |  |  |  |  |  |  |  |  | € 253 |  |  | € 253 |  |  | € 253 |  |  |  | € 253 |  |  |  |  |  | £ 213 |
VMO2 | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Population coverage by 5G networks (in percentage) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |
FiBrasil Infraestructura e Fibra Ótica, S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00% | 50.00% | 50.00% |  |  |  |  |  |
FiBrasil Infraestructura e Fibra Ótica, S.A. | Telefónica Infra, S.L. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FiBrasil Infraestructura e Fibra Ótica, S.A. | Telefonica Brasil, S.A. & FiBrasil Infraestructura e Fibra Otica S.A. | Telefónica Infra, S.L. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 25.00% | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FiBrasil Infraestructura e Fibra Ótica, S.A. | Telefonica Brasil, S.A. & FiBrasil Infraestructura e Fibra Otica S.A. | Caisse de depot et placement du Quebec |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proportion of ownership interest in joint venture (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
FiBrasil Infraestructura e Fibra Ótica, S.A. | Maximum | Telefónica Infra, S.L. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of interests in investments accounted for using equity method |  |  |  |  |  |  |  |  |  |  |  | € 267 | R$ 1,800 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tesco Mobile Ltd. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | € 98 |  | € 232 |  |  |  |  |

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