04/29/2024 04/29/2024 [Member] 04/29/2024 Assets (surplus) of post-employment benefit plans Assets (surplus) of post-employment benefit plans Assets (surplus) of post-employment benefit plans Additions to PP&E, intangible assets and others Purchase of property, plant and equipment, classified as investing activities Receipt of dividends and interest on equity Dividends received, classified as investing activities Entity File Number Entity File Number Non-current liabilities Non-current liabilities recognised as of acquisition date Financing - Financial institutions Financing - Financial institutions [Member] Financing - Financial institutions Net changes of derivative financial instruments [Line Items] Net changes of derivative financial instruments [Line Items] Net changes of derivative financial instruments Visao Visao This member stands for the Visao Telefonica, Visao Multi and Visao Tgestiona (jointly, Visao) defined contribution pension plans with defined benefit components (hybrid plans). Other provision for possible losses Other provision for possible losses Amount of other provisions for possible losses. Infrastructure Infrastructure This member stands for a class of property, plant and equipment representing Infrastructure. Schedule of breakdown, changes and amortization rates of intangible assets Disclosure of detailed information about intangible assets [text block] Levels of fair value hierarchy [domain] Levels of fair value hierarchy [domain] Net defined benefit liability (asset) [axis] Net defined benefit liability (asset) [axis] Gross interest on equity Interest on Equity, Gross Value The gross value of interest on equity. Disclosure of dividends and interest on equity [table] Disclosure of dividends and interest on equity [table] Schedule disclosing information related to dividends and interest on equity. Schedule of reconciliation of income and social contribution tax expense Disclosure of Reconciliation of Income Tax and Social Contribution Expense [Table Text Block] The disclosure of reconciliation of income tax and social contributions tax expenses. Cash generated from operations Cash flows from (used in) operations Total Judicial deposits Judicial deposits Judicial deposits and garnishments as guarantees for tax, civil and labor proceedings. Schedule of treasury shares Disclosure of treasury shares [text block] Disclosure of detailed information about borrowings [abstract] Disclosure of detailed information about borrowings [abstract] Intangible assets Balance at beginning of the period Balance at end of the period Intangible assets and goodwill Statement of comprehensive income [abstract] Statement of comprehensive income [abstract] Financing activities not involving cash and cash equivalents, Business combination Financing Activities Not Involving Cash And Cash Equivalents, Business combination The amount of business combination that do not involve cash and cash equivalents. DIVIDENDS AND INTEREST ON EQUITY Description of Accounting Policy for Dividends and Interest on Equity [Policy Text Block] The description of the entity's accounting policy for dividends and interest on equity. Ifrs Guarantee Obligations Nature [Domain] Ifrs Guarantee Obligations Nature [Domain] Represents a description of the nature of the guarantee or each group of similar guarantees. Other liabilities and leases Other Liabilities and Lease Payables To Related Parties The amount of other liabilities and lease payables to related parties Cybersecurity Risk Management Third Party Engaged [Flag] Distribution of reserves Distribution of reserves Increase (decrease) through transfer of reserves between plans, net defined benefit liability (asset) The increase (decrease) in the net defined benefit liability (asset) resulting from transfer of reserves between plans. Trade accounts receivable Adjustments for decrease (increase) in trade accounts receivable Intangible assets under development Intangible assets under development [member] Business combination Acquisitions through business combinations, intangible assets and goodwill Derivative financial instruments Current Current derivative financial liabilities Prepaid expenses Current Current prepayments Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block] Terra Networks Terra Networks This member stands for Terra Networks. Threshold months for changes in derivative as an economic hedge Threshold months for changes in derivative as an economic hedge Threshold months for changes in derivative as an economic hedge OPERATING COSTS AND EXPENSES Disclosure of expenses [text block] Disclosure of changes in asset limitation Disclosure of changes in asset limitation [Table Text Block] Disclosure of changes in asset limitation Changes in leases, after the adoption of IFRS 16 Changes in leases, after the adoption of IFRS 16 This member stands for the scenario of change in leases after adoption of IFRS 16. National Treasury Note (NTN) National Treasury Note (NTN) This member stands for National Treasury Note (NTN) fixed income investments. Structured investments Structured debt, amount contributed to fair value of plan assets Risk Variable (price) Sensitivity analysis assumptions, risk variable price Sensitivity analysis assumptions, risk variable price Amnesty Program [Axis] Amnesty Program [Axis] Amnesty Program Estimated impairment losses for accounts receivable Disclosure of estimated impairment losses for accounts receivable [line items] Line items represent concepts aging list of trade accounts receivable, net of estimated impairment losses. Reserve for remuneration and investments Reserve for remuneration and investments Reserve for remuneration and investments Write-offs due to payment Provision paid other provisions The amount of write-offs due to payment. PROVISIONS AND CONTINGENCIES Description of accounting policy for provisions [text block] Classes of intangible assets other than goodwill [axis] Classes of intangible assets other than goodwill [axis] Cash and cash equivalents Cash and cash equivalents (Note 3.) [Member] This member stands for cash and cash equivalents. Trade accounts receivable Trade receivables Other cases Other cases [Member] Other cases Losses on cash flow hedges, net of tax Losses on cash flow hedges, net of tax The losses recognised in other comprehensive income on cash flow hedges, net of tax. Cash flows from financing activities Cash flows from (used in) financing activities [abstract] Amounts recognized in OCI Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income Number of common shares held for sale Number of common shares held for sale Number of common shares held for sale OTHER ASSETS OTHER ASSETS No definition available. Total comprehensive income for the year Comprehensive income Telefonica SA Telefonica SA Telefonica SA [Member] This member stands for Telefonica S.A. AmericanDepositoryshares AmericanDepositoryshares[Member] N/A Schedule Of Maturity Analysis Contractual Commitments Schedule Of Maturity Analysis Contractual Commitments TableText Block Represents the information pertaining to maturity analysis contractual commitments. Remaining amount of net profit proposed to Reserve for remuneration to shareholders and investments Remaining amount of net profit proposed to Reserve for remuneration to shareholders and investments Remaining amount of net profit proposed to Reserve for remuneration to shareholders and investments Schedule of changes in amount net of liability (asset) of defined benefit, net Disclosure of net defined benefit liability (asset) [text block] Decrease in depreciation expense Increase (decrease) in accounting estimate IPCA x CDI Swap IPCA x CDI Swap [Member] IPCA x CDI Swap Disclosure of civil provision and contingencies Disclosure of civil provision and contingencies [Table Text Block] Disclosure of civil provision and contingencies Financing activities not involving cash and cash equivalents, Interim and unclaimed dividends and interest on equity Financing Activities Not Involving Cash And Cash Equivalents, Interim and Unclaimed Dividends and Interest on Equity The amount of interim and unclaimed dividends and interest on equity that do not involve cash and cash equivalents Down payment when joining installment Down payment when joining installment Down payment when joining installment Schedule of reconciliation of net liabilities (assets) Disclosure of reconciliation of assets and liabilities [table text block] The disclosure of reconciliation of assets and liabilities. Balance at the beginning of period Balance at the end of period Contract assets OTHER OPERATING INCOME (EXPENSES) [Table] OTHER OPERATING INCOME (EXPENSES) [Table] OTHER OPERATING INCOME (EXPENSES) Vivo Pay III Investment Fund in Credit Rights Vivo Pay III Investment Fund in Credit Rights [Member] Vivo Pay III Investment Fund in Credit Rights Other Group companies Other Group companies This member stands for other group companies. Business combination – FiBrasil Business combination – FiBrasil [Member] Business combination – FiBrasil Trading Symbol Trading Symbol Cash and cash equivalents due to the acquisition (sale) of companies Cash and Cash Equivalents by Incorporation The amount of cash and cash equivalents at incorporation. DIVIDENDS AND INTEREST ON EQUITY DIVIDENDS AND INTEREST ON EQUITY No definition. Other liabilities Non-current Other non-current liabilities Classes of other provisions [domain] Classes of other provisions [domain] Reversal of regulatory provisions due to the Commitment Term Regarding Self-Composition Negotiations for Adaptation of Concession Contracts Reversal of regulatory provisions due to the Commitment Term Regarding Self-Composition Negotiations for Adaptation of Concession Contracts Reversal of regulatory provisions due to the Commitment Term Regarding Self-Composition Negotiations for Adaptation of Concession Contracts Capital contributions in investees, Company Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity attributable to Capital contribution in investees Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity attributable to Capital contribution in investees. Capital reserves Capital reserves [Member] This member stands for the a component of equity representing capital reserves and capital redemption reserves. Noncurrent assets Non-current net defined benefit asset Acquisition of percentage of shares issued by Fibrasil Acquisition of percentage of shares issued by Fibrasil Acquisition of percentage of shares issued by Fibrasil Total Estimated Post-employment benefit expense, defined benefit plans The amount of estimated post-employment benefit expense relating to defined benefit plans. Financial investments in guarantee of lawsuits Financial Investments In Guarantee Of Lawsuits [Member] This member stands for financial investments in guarantee of lawsuits. Trade accounts payable Trade accounts payable This member stands for trade payables. Rental, insurance, condominium and connection means Rental, insurance, condominium and connection means expenses The amount of rental, insurance, condominium and connection means expense. Net transfers Increase (decrease) through transfers, property, plant and equipment Locations that received investment in a new type of technology Locations that received investment in a new type of technology Locations that received investment in a new type of technology Payments for reverse stock split and stock split Payments for reverse stock split and stock split Payments for reverse stock split and stock split Balance of unallocated net income Unallocated net income The amount of unallocated net income. Fair value of liabilities assumed Liabilities assumed as of acquisition date The fair value of liabilities assumed in a business combination recognised as of the acquisition date. Assets held for sale – Property, plant and equipment Assets held for sale – Property, plant and equipment Assets held for sale – Property, plant and equipment Exercise price of outstanding share options Exercise price of outstanding share options Social charges and benefits Social charges and benefits [Member] Social charges and benefits Construction in progress Construction in progress [member] Assets [abstract] Assets [abstract] Municipal Other provision for probable losses of municipal tax Amount of other provisions for probable losses under municipal tax laws. Telefnica IoT, Big Data e Tecnologia do Brasil S.A. ("IoTCo Brasil") IoTco Brasil This member stands for Teleoonica IoT, Big Data e Tecnologia do Brasil S.A. ("IoTCo Brasil"). Capital transaction related to reverse stock split and stock split processes Capital transaction related to reverse stock split and stock split processes Capital transaction related to reverse stock split and stock split processes Later than three months and not later than four months Later than three months and not later than four months [member] Disclosure of Prepayments And Accrued Income Including Contract Assets [Table] Disclosure of Prepayments And Accrued Income Including Contract Assets [Table] Disclosure of Prepayments And Accrued Income Including Contract Assets Personal benefits recognised as of acquisition date Current Personal benefits recognised as of acquisition date Current Personal benefits recognised as of acquisition date Write-offs, net Revaluation increase (decrease), intangible assets other than goodwill Schedule of composition of the balances of the tax judicial deposits Disclosure of Composition of Balances of Tax Judicial Deposits [Table Text Block] The disclosure of composition of balances of tax judicial deposits. Current assets [abstract] Current assets [abstract] NDF US$ NDF US$ This member stands for NDF US$. Schedule of changes in contractual assets arising from the initial adoption of IFRS 15 Explanation of significant changes in contract assets and contract liabilities [text block] Changes in the assets limitation, except interest Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on changes in effect of limiting net defined benefit asset to asset ceiling excluding interest income or expense Type of payment [Domain] Type of payment [Domain] Type of payment [Domain] Schedule of other assets Disclosure of other assets [table text block] Tabular disclosure of other assets. Revenue [abstract] Revenue [abstract] Non-current assets [abstract] Non-current assets [abstract] Debentures Debentures fixed income investments [member ] This member stands for Debentures fixed income investments. Schedule of impacts on the plans' defined benefit liabilities due to the new definition of the actuarial assumptions Disclosure of impacts on the plans defined benefit liabilities due to the new definition of the actuarial assumptions [table text block] The disclosure of impacts on the plans defined benefit liabilities due to the new definition of the actuarial assumptions. General and administrative expenses General and administrative expense Cash and cash equivalents Cash and cash equivalents recognised as of acquisition date Document and Entity Information Document Information [Line Items] Disclosure of defined benefit plans [abstract] Disclosure of defined benefit plans [abstract] Other provision for probable losses Other provision for probable losses Amount of other provisions for probable losses. Computer software Computer software [member] Deferred income and social contribution taxes Combined Deferred Income Tax And Social Contribution Tax Expense Income The amount of combined income tax and social contribution tax expense (income) relating to changes in deferred tax liabilities and deferred tax assets Cash and banks Cash Suppliers recognised as of acquisition date Suppliers recognised as of acquisition date Suppliers recognised as of acquisition date Increase in the discount rate used to adjust the defined benefit liability in the medical cost growth rate Increase in the discount rate used to adjust the defined benefit liability in the medical cost growth rate Increase in the discount rate used to adjust the defined benefit liability in the medical cost growth rate Cash flows from investing activities Cash flows from (used in) investing activities [abstract] Actuarial liabilities per balance sheet Actuarial liabilities per balance sheet Actuarial liabilities per balance sheet Member contributions paid Participants contributions paid Decrease (increase) in net defined benefit liability (asset) resulting from contributions to plan by plan participants Number Of Installments For Payments Offered Number Of Installments For Payments Offered Number Of Installments For Payments Offered Period for paying sales commissions to obtain customer contracts Period for paying sales commissions to obtain customer contracts Period for paying sales commissions to obtain customer contracts Other changes in borrowings Other changes in borrowings Other changes in borrowings Net exposure in euro Net exposure in euro, market risk The amount of net credit exposure to market risk in Euro. Description of accounting policy for determining components of cash and cash equivalents CASH AND CASH EQUIVALENTS Description of accounting policy for determining components of cash and cash equivalents [text block] ADDITIONAL INFORMATION ON CASH FLOWS ADDITIONAL INFORMATION ON CASH FLOWS No definition available. OPERATIONS Disclosure of nature of operations [Line items] Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. Prepaid expenses [Line Items] Prepaid expenses [Line Items] Prepaid expenses Risk Variable Ratio Sensitivity analysis assumptions, risk variable ratio Risk variable ratio on sensitivity analysis assumptions. Total Total This member stands for Telefonica Cloud e Tecnologia do Brasil S.A. . ("CloudCo Brasil") and Teleoonica IoT, , Big Data e Tecnologia do Brasil S.A. . ("IoTCo Brasil"). Related-party receivables Related-party receivables (Note 11) [Member] This member stands for related-party receivables Reversals of provisions for fines for canceling leases and dismantling contracts Reversals of provisions for fines for canceling leases and dismantling contracts Reversals of provisions for fines for canceling leases and dismantling contracts Cumulative Translation Adjustments (CTA) on transactions in foreign currency Other comprehensive income, net of tax, exchange differences on translation of foreign operations Non-current assets Non-current assets Trade and other receivables as of acquisition date Trade and other receivables recognised as of acquisition date Trade and other receivables recognised as of acquisition date Gains (losses) on derivative financial instruments Other comprehensive income, before tax, cash flow hedges Taxes, charges and contributions recoverable Current Taxes, Charges and Contributions Recoverable, Current The amount of current value of taxes, charges and contributions recoverable. Disclosure of defined benefit plans [table] Disclosure of defined benefit plans [table] Percentage of consolidated expected credit losses Percentage of consolidated expected credit losses Percentage of consolidated expected credit losses Classes of property, plant and equipment [axis] Classes of property, plant and equipment [axis] Not later than one month Not later than one month [member] Income tax and social contribution and collection Income tax and social contribution and collection Income tax and social contribution and collection TAXES, CHARGES AND CONTRIBUTIONS RECOVERABLE TAXES, CHARGES AND CONTRIBUTIONS RECOVERABLE No definition available. Schedule of financial income (expenses) Disclosure of financial income expenses [table text block] The tabular disclosure of financial income and expenses. Legal reserve percentage of share capital Legal reserve percentage of share capital Legal reserve percentage of share capital Current merchandise Current merchandise 08/25/2025 08/25/2025 [Member] 08/25/2025 Disclosure of detailed information about financial instruments [table] Disclosure of detailed information about financial instruments [table] Trade accounts receivable Current Trade and other current receivables Dividends and interest on equity Dividends and interest on equity Dividends and interest on equity Entity Interactive Data Current Entity Interactive Data Current Cost of sales and services Cost Of Sales And Services [Member] Primary financial statement caption encompassing cost of sales and services. Monthly payments of assets (surplus) of post-employment benefits plans Monthly payments of assets (surplus) of post-employment benefits plans Monthly payments of assets (surplus) of post-employment benefits plans Schedule of sensitivity analysis net exposure Disclosure sensitivity analysis net exposure [table text block] The disclosure sensitivity analysis of net exposure. Consideration based on contractual clauses Consideration Based on Contractual Clauses Amount of consideration based on contractual clauses. Telefonica Moviles Argentina Telefonica Moviles Argentina This member stands for Telefonica Moviles Argentina. Post-retirement health plans, Male participants Post-retirement health plans, Male participants This member stands for post-employment defined benefit post-retirement health plans for male participants. Excludes defined benefit pension plans and defined contribution plans. Other comprehensive income Other comprehensive income relating to change in investments The amount of other comprehensive income relating to change in investments. Companhia AIX de Participações ("AIX") Companhia AIX de Participações ("AIX") [Member] Companhia AIX de Participações ("AIX") Operating costs and expenses Disclosure of attribution of expenses by nature to their function [line items] Levels of fair value hierarchy [axis] Levels of fair value hierarchy [axis] Interest on equity Equity attributable to owners of parent [member] Additions Increase Through Additions, Deferred Income, Contractual Liabilities The increase in deferred income from contractual liabilities through additions during the period. Balance at the beginning of period, Provision for losses Balance at the end of period, Provision for losses Provision for Losses on Contract Assets The amount of provision for losses on contract assets. Copper Hedge (liabilities position) derivatives of High Copper risk Copper Hedge (liabilities position) derivatives of High Copper risk [Member] Copper Hedge (liabilities position) derivatives of High Copper risk Total Proposal for Distributions Total Proposal for Distributions Represents the amount of total proposal for distributions. Software and networks maintenance Prepaid software and networks maintenance The amount recognised as a asset for expenditures made prior to the period when the economic benefit will be realised with respect to software and networks maintenance. Other temporary differences Other temporary differences This member stands for income and social contribution taxes on other temporary differences. Type of payment [Axis] Type of payment [Axis] Type of payment Gurantee IFRS Guarantee Obligations, Carrying Value The carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. Income tax rate Income tax rate The income tax rate. Entity Central Index Key Entity Central Index Key Amounts from related parties Trade receivables due from related parties Trade receivables due from related parties The amount of trade receivables resulting from related party transactions. Noncurrent Loans and financing non current The amount of non current portion of loans and financing. CASH AND CASH EQUIVALENTS Disclosure of cash and cash equivalents [text block] Other assets, current Other current receivables due from related parties The current portion of other receivables due from related parties excludes trade receivables. Attributable to: Profit (loss), attributable to [abstract] Loan and Financing Other Loan and Financing Other [Member] Loan and Financing Other Additions Additions other than through business combinations, property, plant and equipment Liabilities with ANATEL Other liabilities, payment for license renewal The amount of license fee renewal payment classified as other liabilities. Taxes, charges and contributions Adjustments for decrease (increase) in taxes, charges and contributions Adjustments for decrease (increase) in Taxes, charges and contributions to reconcile profit (loss) to net cash flow from (used in) operating activities. Type of Taxes [Axis] Type of Taxes [Axis] Represents the types of taxes. Gross contractual amounts receivable for acquired receivables Gross contractual amounts receivable for acquired receivables Audit Information [Abstract] Audit Information [Abstract] Audit Information LOANS, FINANCING, DEBENTURES, LEASE, 5G LICENSES AND LIABILITIES FOR THE ACQUISITION OF A COMPANY Description of Accounting Policy for Loans, Financing, Debentures, Lease, Licenses and Liabilities for Acquisition of a Company, Policy [Policy Text Block] The description of the entity's accounting policy for loans, financing, debentures, lease, 5G licenses and liabilities for acquisition of a company. Pension plans and other post-retirement benefits Adjustments for increase (decrease) in employee benefit liabilities Transfers from level 1 to 2 assets Transfers out of Level 1 into Level 2 of fair value hierarchy, assets held at end of reporting period Business combination – Cyber Business combination – Cyber [Member] Business combination – Cyber Provision for fines for canceling lease agreements Provision For Fines For Canceling Lease Agreements [Member] This member stands for a provision relating to fines for canceling lease agreements. Payments - derivative financial instruments Payments Payments for derivative financial instruments The cash outflow for the payments for derivative financial instruments classified as financing activities. Disclosure of trade accounts receivables [table] Disclosure of trade accounts receivables [table] Schedule disclosing information related to details of Disclosure of trade accounts receivables. Statement of cash flows [abstract] Statement of cash flows [abstract] Companhia ACT de Participações ("ACT") Companhia ACT de Participações ("ACT") [Member] This member stands for Companhia ACT de Participacoes. Amortization period Amortization period Amortization period Current service cost Defined benefit plans estimated service cost Amount of estimated service cost expense recognized related to defined benefit plan. Business days considered for the adjustment to the updated nominal value of the debentures Business days considered for the adjustment to the updated nominal value of the debentures Business days considered for the adjustment to the updated nominal value of the debentures Price of Copper (Ton) - US$ Price of Copper (Ton) - US$ [Member] Price of Copper (Ton) - US$ Reduction of the percentage of tax on corporate income Reduction of the percentage of tax on corporate income Reduction of the percentage of tax on corporate income Interconnection / interlink Payables for purchase of non-current assets Judicial deposits and garnishments Non-current Non-current restricted cash and cash equivalents Allocation of fair value attributed to intangible assets Allocation of fair value attributed to intangible assets Allocation of fair value attributed to intangible assets Increase (decrease) through acquisition of subsidiary, equity Increase (decrease) through acquisition of subsidiary, equity JUDICIAL DEPOSITS AND GARNISHMENTS Judicial deposits and garnishments [text block] The entire disclosure of judicial deposits and garnishments Disclosure of estimated impairment losses for accounts receivable [table] Disclosure of estimated impairment losses for accounts receivable [table] Disclosure of detailed information about estimated impairment losses for accounts receivable. Reference interest rate (SELIC) Reference interest rate (SELIC) Reference interest rate (SELIC) Investments Investments accounted for using equity method Nominal value per common share sold at auction Nominal value per common share sold at auction Nominal value per common share sold at auction OTHER OPERATING INCOME (EXPENSES) OTHER OPERATING INCOME (EXPENSES) No definition available. Taxes Income tax relating to cash flow hedges included in other comprehensive income Payment of SMP burden loss Payment Of Personal Service Movable Loss Amount of personal service movable loss of payment. Profit sharing Profit sharing This member stands for profit sharing. Financial investments Non-current Non-current investments other than investments accounted for using equity method Future salary growth rate Actuarial assumption of expected rates of salary increases Effect of asset ceiling Effect of asset ceiling [member] Total Prepayments Classes of contingent liabilities [domain] Classes of contingent liabilities [domain] Debt risk of a fall in copper prices Debt risk of a fall in copper prices [Member] Debt risk of a fall in copper prices Total Finance income Percentage of allocation of net profit to the reserve Percentage of allocation of net profit to the reserve Percentage of allocation of net profit to the reserve Document Shell Company Report Document Shell Company Report PROVISIONS AND CONTINGENCIES Disclosure of other provisions [line items] Disclosure of other provisions [line items] Trade accounts receivables Aging list of trade accounts receivable Disclosure of trade accounts receivables [line items] Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. Sponsor contributions paid Decrease (increase) in net defined benefit liability (asset) resulting from resulting from contributions to plan by employer General and administrative expenses General And Administrative Expense [Member] Primary financial statement caption encompassing general and administrative expense. Schedule of changes in equity valuation adjustment Disclosure of analysis of other comprehensive income by item [text block] Legal proceedings Legal proceedings [Member] Legal proceedings Sale of real estate and other receivables Sale of Real Estate and Other Receivables Amount of sale from real estate and other receivables. Expansion and modernization reserve Expansion and modernization reserve This member stands for component of equity representing the expansion and modernization reserve. Import duty (as a percent) Percentage of Import Duty The percentage of the import duty. Reverse stock split and stock split Reverse stock split and stock split [Member] Reverse stock split and stock split Failure to provide services and products sold Failure to provide services and products sold [Member] Failure to provide services and products sold Discount rate to present value of defined benefit liability Actuarial assumption of discount rates Gross operating revenue Gross operating revenue The amount of gross operating revenue. Annual amortization rate (%) Amortisation rate, intangible assets other than goodwill Repurchase of common shares for maintenance in treasury Repurchase Of Common Shares The decrease in equity resulting from the repurchase of treasury shares. INTANGIBLE ASSETS Disclosure of intangible assets and goodwill [text block] Interest On Equity And Intermediate Dividends Gross Amount Interest On Equity And Intermediate Dividends Gross Amount The gross amount of interest on equity and dividend. Benefits paid directly by the sponsor Estimated benefits paid by the sponsor The estimated benefits paid by the sponsor to a defined benefit plan. Reverse stock split and stock split Reverse stock split and stock split Reverse stock split and stock split PBS-A, Telefonica BD and CTB PBS-A, Telefonica BD and CTB This member stands for the PBS Assisted Plan (PBS-A) defined benefit private pension plan, the Companhia Telefonica Brasileira (CTB) pension supplementation benefit and the Telefonica Defined Benefit retirement plan. FINANCIAL INCOME (EXPENSES) FINANCIAL INCOME (EXPENSES) No definition available. Other provisions Other provisions Trade accounts payable Adjustments for increase (decrease) in trade accounts payable Loans, financing, debentures and leases Loans Financing Debentures And Leases Non Current The amount of non-current value of loans, financing debentures and leases. Other expenses with foreign exchange and monetary variation (suppliers, taxes and others) Other expenses on foreign exchange and monetary variation The amount of other expenses with foreign exchange and monetary variation. ADDITIONAL INFORMATION ON CASH FLOWS Disclosure of cash flow statement [text block] Fistel, INSS, ISS and other taxes Fistel, INSS, ISS and other taxes The amount of Fistel, INSS, ISS and other taxes. SUBSEQUENT EVENTS Disclosure of events after reporting period [text block] FINANCIAL INVESTMENTS Disclosure of Financial Investments [Text Block] The entire disclosure for financial investments. Adjustments, Allocation of income to legal reserve Adjustments, Allocation of income to legal reserve The adjustment for the amount of allocation of income to legal reserve. Brazil, Brazil Real Brazil, Brazil Real Cash flows from operating activities Cash flows from (used in) operating activities [abstract] Equity Equity Share of profit (loss) of associates and joint ventures accounted for using equity method Execution of projects related to investments and maintenance of the STFC service Execution of projects related to investments and maintenance of the STFC service Execution of projects related to investments and maintenance of the STFC service PSP Cycle 2023-2025 PSP Cycle 2023-2025 [Member] PSP Cycle 2023-2025 Cybersecurity Risk Management, Strategy, and Governance [Line Items] Document Period End Date Document Period End Date Non-adjusting events after reporting period [domain] Non-adjusting events after reporting period [domain] Leases charges Lease Charges The amount of lease charges incurred during the period. Cash received from sale of investments Proceeds from sales of investments accounted for using equity method Inflation rate Description of inflation rate applied to cash flow projections The inflation rate applied to cash flow projections for a cash-generating unit (group of units). 10/27/2025 10/27/2025 [Member] 10/27/2025 Classes of financial instruments [axis] Classes of financial instruments [axis] Loan and financing Loan and financing This member stands for loans and financing financial institutions. Increased import duty (as a percent) Increased Import Duty Percentage Increased percentage of import duty applicable to the company. Expense from share-based payment transactions with employees Expense from share-based payment transactions with employees Classes of financial assets [axis] Classes of financial assets [axis] Post-retirement health plans, Female participants Post-retirement health plans, Female participants This member stands for post-employment defined benefit post-retirement health plans for female participants. Excludes defined benefit pension plans and defined contribution plans. OTHER OPERATING INCOME (EXPENSES) [Line Items] OTHER OPERATING INCOME (EXPENSES) [Line Items] OTHER OPERATING INCOME (EXPENSES) Monthly interest rate Monthly interest rate Monthly interest rate Initial balance when joining installment Initial balance when joining installment Initial balance when joining installment Brand Brand names [member] Shareholders name [domain] Shareholders name [domain] This member stands for shareholders name. Land Land [member] Share Repurchase Program, Authorized, Amount Share Repurchase Program, Authorized, Amount Present value of defined benefit obligation current actuarial assumptions Present value of defined benefit obligation current actuarial assumptions [Member] Present value of defined benefit obligation current actuarial assumptions Percentage of spread Percentage of spread Percentage of spread FINANCIAL INVESTMENTS FINANCIAL INVESTMENTS No definition available. 2030 Later than four years and not later than five years [member] Relating to failure to supply services and/or products sold Provisions for civil contingencies assessed as probable losses relating to failure to supply services and/or products sold Provisions relating to various civil proceedings related to consumers at the administrative and judicial level, relating to failure to supply services and/or products sold. Schedule of changes in estimated losses for impairment Disclosure of allowance for credit losses [text block] Taxes Income tax relating to financial assets measured at fair value through other comprehensive income included in other comprehensive income Range [axis] Range [axis] Fixed interest rate Fixed interest rate [member] Taxes recoverable Adjustments for Taxes recoverable Adjustments for decrease (increase) in taxes recoverable to reconcile profit (loss) to net cash flow from (used in) operating activities. 07/26/2024 07/26/2024 [Member] 07/26/2024 Fines under clarification embargoes Fines under clarification embargoes Fines under clarification embargoes Income before taxes Income before taxes Profit (loss) before tax Other liabilities, non-current Other noncurrent payables to related parties The non-current portion of other payables due to related parties excludes trade payables. Joint control Entities with joint control or significant influence over entity [member] OPERATIONS OPERATIONS No Definition Nominal value payable Minimum Finance Lease Payments Payables The amount of payments over the finance lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with any amounts guaranteed by the lessee or by a party related to the lessee. Selling expenses Selling expense Hedge IPCA (liabilities position) derivatives risk of increase in CDI Hedge IPCA (liabilities position) derivatives risk of increase in CDI This member stands for hedge IPCA short position derivatives risk of increase in CDI. Payments of costs related to reverse stock split and stock split operations Payments of costs related to reverse stock split and stock split operations Payments of costs related to reverse stock split and stock split operations Write-offs (payments), principal Borrowings Repayments of Principal, Write Offs The amount of principal payments write-offs of borrowings. State Other provision for probable losses of state tax Amount of other provisions for probable losses under state tax laws. EQUITY Disclosure of share capital, reserves and other equity interest [text block] Number of collection cycles Number of Collection Cycles Represents the number of collection cycles. State Other provision for possible losses of state tax Amount of other provisions for possible losses under state tax laws. Total for all joint ventures Total for all joint ventures [member] Disclosure of other provisions [table] Disclosure of other provisions [table] Effects of non-controlling shareholders on investments in Vivo Ventures Effects of Non-Controlling Shareholders on Investments in Vivo Ventures Amount of effects of non-controlling shareholders on investments in Vivo Ventures. Classes of financial instruments [domain] Classes of financial instruments [domain] Number of shares cancelled Number of Shares Cancelled The number of shares cancelled by the entity. Reduction of issued capital Reduction of issued capital Hedge (assets position) derivatives depreciation risk in Euro Hedge (assets position) derivatives depreciation risk in Euro This member stands for hedge (long position) derivatives depreciation risk in Euro. 02/24/2025 02/24/2025 [Member] 02/24/2025 Taxes Tax on operating revenue The amount of taxes on operating revenue. Unclaimed dividends and interest on equity Increase (decrease) through prescribed equity instruments including unclaimed dividends and interest on equity, equity The increase (decrease) in equity resulting from the prescribed equity instruments including unclaimed dividends and interest on equity. Income and social contribution taxes payable Non-current Income And Social Contribution Taxes Payable Non Current The amount of Non current value of income and social contribution taxes payable. Products and services [domain] Products and services [domain] FINANCIAL INCOME (EXPENSES) [Table] FINANCIAL INCOME (EXPENSES) [Table] FINANCIAL INCOME (EXPENSES) Other Other Tax Effects For Reconciliation Between Accounting Profit And Combined Income Tax And Social Contribution Tax Tax Expense Income The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the combined applicable tax rate(s) including income tax and social contribution tax that the entity does not separately disclose in the same statement or note. 11/24/2025 11/24/2025 [Member] 11/24/2025 Disclosure of detailed information about intangible assets [table] Disclosure of detailed information about intangible assets [table] Other reserves Other reserves Borrowings Carrying amount Loans, financing, debentures, leases and contingent consideration Borrowings Deductible temporary differences arising from the acquisition of Garliava Deductible temporary differences arising from the acquisition of Garliava Deductible temporary differences arising from the acquisition of Garliava Short-term investments Short-term investments, classified as cash equivalents Deferred income tax and social security contributions Deferred income tax and social security contributions recognised as of acquisition date Deferred income tax and social security contributions recognised as of acquisition date Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] 25% depreciation 25% depreciation This member stands for scenario of twenty five percentage downward variation. Sale of goods and fixed assets Deferred Income Other than Contract Liabilities, Sale of Goods and Fixed Assets The amount of liabilities representing income that has been received (or the amount is due) but is not yet earned from sale of goods and fixed assets, other than contract liabilities. [Refer: Contract liabilities] PIS and COFINS PIS and COFINS [Member] PIS and COFINS Risk Variable (as a percent) Sensitivity analysis assumptions, risk variable percentage Risk variable percentage on sensitivity analysis assumptions. Net cash used in financing activities Cash flows from (used in) financing activities Maximum limits of claims for operational risks Maximum Coverage of Insurance Claims, Operational Risks The maximum coverage of insurance claims for operational risks. Operating revenues (cost and other expenses) Other operating revenues (expenses), related party transactions The amount of revenue (expense) arising from the rendering (receiving) of services in related party transactions. Preferred shares Preference shares [member] Maximum limits of claims for general civil liability risks Maximum Coverage of Insurance Claims, General Civil Liability Risks The maximum coverage of insurance claims for general civil liability. Number of treasury shares cancelled Number of treasury shares cancelled Number of treasury shares cancelled IRRF on shareholders exempt/immune from interest on equity IRRF on shareholders exempt/immune from interest on equity The amount of IRRF on shareholders exempt/immune from interest on equity. Number of days prior to the actual payment Number of days prior to the actual payment Number of days prior to the actual payment Fust and Funttel Fust and Funttel [Member] Fust and Funttel Fair value of plan assets Total Plan assets, at fair value Treasury shares Treasury shares 05/22/2025 05/22/2025 [Member] 05/22/2025 Amount of reduce the company share capital Amount of reduce the company share capital Amount of reduce the company share capital Statement of changes in equity [table] Statement of changes in equity [table] Financial Letter Financial Letter This member stands for Financial bills fixed income investments. PPE fair value attributed to fixed asset items PPE fair value attributed to fixed asset items PPE fair value attributed to fixed asset items Provision for Telecommunications Inspection Fund Other provision for possible losses of ANATEL under Telecommunications Inspection Fund Amount of other provisions for possible losses under Brazil???s Telecommunications Regulatory Agency under Telecommunications Inspection Fund . Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] Reversal of expansion and Modernization Reserve Allocation of income to reversal expansion and modernization reserve The amount of allocation of income on reversal expansion and modernization reserve. Composition of fair value of net assets acquired Composition of fair value of net assets acquired [Table Text Block] Represents the composition of fair value of net assets acquired. Proceeds from sale of PP&E Proceeds from sales of property, plant and equipment, classified as investing activities FiBrasil Infraestrutura e Fibra Ótica S.A. (“FiBrasil”) FiBrasil Infraestrutura e Fibra Ótica S.A. (“FiBrasil”) [Member] This member stands for FiBrasil Infraestrutura e Fibra Otica SA ("FiBrasil"). Schedule of expected realization of deferred taxes Disclosure Of Expected Realization Of Deferred Taxes [Table Text Block] Tabular disclosure of expected realization of deferred taxes. Aliança Atlântica Holding B.V. . ("Aliança") Aliança Atlântica Holding B.V. . ("Aliança") [Member] This member stands for Aliana Atlntica Holding B.V. FiBrasil Infraestrutura e Fibra Otica FiBrasil Infraestrutura e Fibra Otica This member stands for FiBrasil Infraestrutura e Fibra Otica Additions Additions (reversal), net Increase (Decrease) by Additions (Reversal), Other Provisions Increase (decrease) in other provisions by additions (reversal) of provisions. Minimum Bottom of range [member] Net exposure in us dollars hedge short position Net exposure in us dollars hedge short position, market risk The amount of net credit exposure to market risk in US dollars for hedge short position. Later than four months Later than four months [member] IPCA x CDI IPCA x CDI This member stands for board consumer price index (IPCA) swap contract. Decrease in the discount rate used to adjust the defined benefit liability in the medical cost growth rate Decrease in the discount rate used to adjust the defined benefit liability in the medical cost growth rate Decrease in the discount rate used to adjust the defined benefit liability in the medical cost growth rate Categories of related parties [axis] Categories of related parties [axis] Description of accounting policy for impairment of non-financial assets IMPAIRMENT OF NON-FINANCIAL ASSETS Description of accounting policy for impairment of non-financial assets [text block] Net income for the year Net income for the year Net income for the year Consolidated net income Profit (loss) Telefônica Cloud e Tecnologia do Brasil ("CloudCo Brasil") Telefônica Cloud e Tecnologia do Brasil ("CloudCo Brasil") [Member] This member stands forTelefonica Cloud e Tecnologia do Brasil S.A. ("CloudCo Brasil"). Services Services [Member] This member stands for telephone services, use of interconnection network, data and SVA services, cable TV and other services. Supplementary dividends from the previous year Supplementary dividends payable to owners of parent, relating to prior years The amount of supplementary dividends payable as distributions to owners of the parent relating to prior years. Possible losses provisions Possible losses provisions Amount of possible losses in provisions. Equity Adjustments for undistributed profits of associates Foreign currency x CDI Foreign currency x CDI This member stands for foreign currency swap contract. Loans and financing Non-current loans - financial institutions Non-current loans - financial institutions Non-current liabilities Non-current liabilities Business combination – IPNET Business combination – IPNET [Member] Business combination – IPNET Property, plant and equipment recognised as of acquisition date Property, plant and equipment recognised as of acquisition date Dividends and interest on equity Balance at the beginning of the fiscal year Balance at the end of the year Dividend and interest on equity current payable The amount of current dividend and interest on equity payable. Total Loans and financing Loans and financing The amount of loans and financing. Percentage referring to the reversal of remaining parts resulting from the agreement in relation to the Post-Closing Adjustment Percentage referring to the reversal of remaining parts resulting from the agreement in relation to the Post-Closing Adjustment Percentage referring to the reversal of remaining parts resulting from the agreement in relation to the Post-Closing Adjustment Non-current assets Non-current assets recognised as of acquisition date Document Registration Statement Document Registration Statement Taxes, charges and contributions Taxes, charges and contributions expense The amount of taxes, charges and contributions expense. T. IoT Big Data Tech ESP T. IoT Big Data Tech ESP This member stands for T. IoT Big Data Tech ESP Others Deferred Income Tax And Social Contribution Tax Expense Income Others Deferred Income Tax And Social Contribution Tax Expense Income Others Deferred Income Tax And Social Contribution Tax Expense Income Percentage of distribution of resources to the Company's shareholders as a percentage of the share capital Percentage of distribution of resources to the Company's shareholders as a percentage of the share capital Percentage of distribution of resources to the Company's shareholders as a percentage of the share capital Interest income Investment income Present value of defined benefit obligation [member] Present value of defined benefit obligation [member] Estimated losses from modems and other P&E items Estimated losses from modems and other P&E items This member stands for estimated losses from modems and other P&E items. Schedule of sensitivity analysis for actuarial assumptions Disclosure of sensitivity analysis for actuarial assumptions [text block] Total nominal values Contractual Commitments For Purchase Of Goods And Services The amount of unrecognized contractual commitments for purchase of goods and services. Business Contact Business Contact [Member] Liabilities [abstract] Liabilities [abstract] Asset limitation effect Gains (losses) on changes in effect of limiting net defined benefit asset to asset ceiling excluding interest income or expense, before tax, defined benefit plans Disclosure of regulatory provision and contingencies Disclosure of regulatory provision and contingencies [Table Text Block] Disclosure of regulatory provision and contingencies Mandatory minimum dividend - 25% of adjusted net income Mandatory minimum dividend The amount of mandatory minimum dividend. Telefonica Global Solutions Participacoes Telefonica Global Solutions Participacoes [Member] This member stands for Telefonica Global Solutions Participacoes. Telecommunications Inspection Fund (FISTEL) Telecommunications Inspection Fund (FISTEL) This member stands for telecommunications inspection fund. Gross carrying amount Carrying amount Carrying amount [member] Other taxes, charges and contributions Other taxes, charges and contributions This member stands for other taxes, charges and contributions. Other Taxe Other Taxe Other Taxe Current Loans and financing current The amount of current portion of loans and financing. Contractual Liabilities (costumers contracts) Balance at the beginning of the year Balance at the end of the year Total Deferred Income, Contractual Liabilities The amount of deferred income arising from contractual liabilities. Type of provisions for employee benefits [Axis] Type of provisions for employee benefits [Axis] Type of provisions for employee benefits Security Exchange Name Security Exchange Name Current service cost Current service cost, defined benefit plans Fine aplied Fine aplied Fine aplied Income tax and social contribution liabilities Income tax and social contribution liabilities Income tax and social contribution liabilities Selling expenses Selling And Marketing Expense [Member] Primary financial statement caption encompassing selling and marketing expense. Notional value for derivative Assets Notional value for derivative Assets Notional value for derivative Assets Foreign currency denominated loan was obtained from Citibank (US dollar), through Law No. 4.131 Foreign currency denominated loan was obtained from Citibank (US dollar), through Law No. 4.131 This member stands for foreign currency denominated loan was obtained from Citibank (US dollar), through Law No. 4.131. Common shares sold at auction Common shares sold at auction Common shares sold at auction Actuarial losses (gains) Actuarial gains (losses) arising from experience adjustments, before tax, defined benefit plans Liabilities for the acquisition of a company - Vita IT Vita IT Comrcio e Servios de Solues em TI Ltda [Member] Represents the information pertaining to Vita IT Comrcio e Servios de Solues em TI Ltda.. Description of accounting policy for Net Operating Revenue Description of accounting policy for Net Operating Revenue [Policy Text Block] Description of accounting policy for Net Operating Revenue Civil Judicial Civil Deposits Judicial deposits and garnishments as guarantees for civil proceedings. Financial Investments IFRS Financial Investments Represents the amount of financial investments during the period. Gains from the reversal of operating expenses of provision for contingencies Gains from the reversal of operating expenses of provision for contingencies Gains from the reversal of operating expenses of provision for contingencies Financing activities not involving cash and cash equivalents, Additions (Cancellations) of leases contracts and supplier financing Financing Activities Not Involving Cash And Cash Equivalents, Additions Of Financial Lease And Supplier Financing The amount of additions of finance lease and supplier financing that do not involve cash and cash equivalents Schedule of net changes of derivative financial instruments Disclosure of maturity profile of our financial liabilities as set forth in loan agreements [table text block] The disclosure of maturity profile of our financial liabilities as set forth in loan agreements. Disclosure of fair value of plan assets [table] Disclosure of fair value of plan assets [table] Schedule of income and social contribution taxes recoverable Disclosure of Income and Social Contributions Taxes Recoverable [Table Text Block] The disclosure of income and social contributions taxes recoverable. Increase of value on construction of high capacity backhaul infrastructure for alternative plans Increase of value on construction of high capacity backhaul infrastructure for alternative plans Increase of value on construction of high capacity backhaul infrastructure for alternative plans Financial assets Fair value Financial assets, at fair value Judicial deposits and garnishments Current Current restricted cash and cash equivalents Proposed additional dividends - Net income for the year Allocation of Income to Additional Dividend Represents the amount of allocation of income on additional dividends. Schedule of amounts receivable, by maturity Disclosure of the aging list of trade accounts receivable, net of estimated impairment losses [table text block] Tabular disclosure of the aging list of trade accounts receivable, net of estimated impairment losses. State of Paraná Amnesty Program State of Paraná Amnesty Program [Member] State of Paraná Amnesty Program Unclaimed dividends and interest on equity Unclaimed dividends and interest on equity Unclaimed dividends and interest on equity The amount of dividends and interest on equity paid and unclaimed. Dividend and interest on equity approval dates [axis] Dividend and interest on equity approval dates [axis] The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table. Current service costs Increase in net defined benefit liability (asset) resulting from current service cost Telefonica Hispanoamerica Telefonica Hispanoamerica [Member] Telefonica Hispanoamerica Refinancing and Amnesty Program Refinancing and Amnesty Program [Member] Refinancing and Amnesty Program Total Operating expense Interest accruals Increase Through Interest Accruals, Other Provisions The increase in other provisions through interest accruals. Useful life measured as period of time, intangible assets other than goodwill Useful life measured as period of time, intangible assets other than goodwill Schedule of average weighted duration of defined benefit liability Disclosure of information about maturity profile of defined benefit obligation [text block] Government grants Deferred income, government grants The amount of deferred income arising from government grants. POP Internet Ltda ("POP") POP Internet Ltda ("POP") This member stands for POP Internet Ltda. Period of assessment of value of goodwill Goodwill Assessment Term The period of time used to assess goodwill. Payments of installment agreements Payments of installment agreements Payments of installment agreements IOE, Net Value Interest on equity, net The amount of interest on equity relating to the current year, recognised as distributions to owners of the parent, net of wittholding tax. Entity Addresses, Address Type [Axis] Entity Addresses, Address Type [Axis] Current income tax and social contribution Current income tax and social contribution Current income tax and social contribution Property, plant and equipment Balance at beginning of the period Balance at end of the period Property, plant and equipment Subletting of assets and other amounts to be realized Other receivables Garnishments Garnishments The amount of garnishments as guarantees for tax, civil and labor proceedings. Adjustment - Tax incentives Tax incentives on corporate income tax return adjustments The amount of tax incentives on corporate income tax return adjustments Increase in the discount rate used to adjust the defined benefit liability to present value Increase in the discount rate used to adjust the defined benefit liability to present value Increase in the discount rate used to adjust the defined benefit liability to present value Current assets Current net defined benefit asset CADE CADE [Member] CADE Assumption of debt Assumption of debt Assumption of debt Vivo Ventures ("VV") Vivo Ventures [Member] Vivo ventures Vale Saúde Sempre Business Combination Vale Saúde Sempre [Member] Business Combination Vale Saúde Sempre Other liabilities Current Other current liabilities Shareholders name [axis] Shareholders name [axis] The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table. Average weighted duration of defined benefit liability Weighted average duration of defined benefit obligation Other assets Total Other assets Pre-rate Pre-rate [Member] Pre-rate PROPERTY, PLANT AND EQUIPMENT Disclosure of detailed information about property, plant and equipment [line items] NDF Copper x Pre NDF Copper x Pre [Member] NDF Copper x Pre Repurchase operations Repurchase operations This member stands for Bank Deposit Certificates (CDB) fixed income investments. Dividend and interest on equity paid Dividends paid, classified as financing activities Reduction of the Company's capital Reduction of the Company's capital Reduction of the Company's capital Prepaid expenses Adjustments for decrease (increase) in prepaid expenses Total share capital Total share capital Total share capital Borrowings Cancellation Of Contracts And Other Write Offs Borrowings Cancellation Of Contracts And Other Write Offs Amount of Cancellations and Write offs PSP VIVO Cycle 2023-2025 PSP VIVO Cycle 2023-2025 [Member] This member stands for 2023-2025 cycle period under the Performance Share Plan ("PSP VIVO"). Later than one month and not later than two months Later than one month and not later than two months [member] Discount rate for estimated future cash flows before tax Description Of Pre Tax Discount Rates Applied To Cash Flow Projections The before tax discount rate applied to cash flow projections for a cash-generating unit (group of units). Schedule of changes in contractual liabilities (IFRS 15), mainly related to the sale of prepaid credits Disclosure Of Changes In Contractual Liabilities, Explanatory The disclosure of detailed information about changes in contractual liabilities. Composition of the book value of the identifiable net assets acquired Composition of the book value of the identifiable net assets acquired [Table Text Block] Composition of the book value of the identifiable net assets acquired Balance at beginning Balance at ending Total Deferred tax liability (asset) Interest on equity and dividends, gross amount Dividend and IOE allocated for the year Dividend and IOE allocated for the year Capital reserves Capital and Capital Redemption Reserves A amount of equity representing the capital reserves. and the reserve for the redemption of the entity's own shares. Current liabilities Current liabilities Additional proposed dividends Additional proposed dividends The component of equity representing the amount of additional proposed dividend. Gain (loss) recognised as result of remeasuring to fair value equity interest in acquiree held by acquirer before business combination Gain (loss) recognised as result of remeasuring to fair value equity interest in acquiree held by acquirer before business combination Daily fine in case of noncompliance Daily fine in case of noncompliance Amount of daily fine in case of noncompliance due to an unfavorable decision handed down determining that the Company should refrain from selling mobile phones with Caller ID service. TAXES, CHARGES AND CONTRIBUTIONS PAYABLE TAXES, CHARGES AND CONTRIBUTIONS PAYABLE [Text Block] TAXES, CHARGES AND CONTRIBUTIONS PAYABLE DEFERRED TAXES AND TAXES RECOVERABLE Disclosure of temporary difference, unused tax losses and unused tax credits [line items] Disclosure of temporary difference, unused tax losses and unused tax credits [line items] Telefonica Factoring do Brasil Telefonica Factoring do Brasil This member stands for Telefonica Factoring do Brasil. Fair value attributed to the contingent liability updated by the SELIC rate Fair value attributed to the contingent liability updated by the SELIC rate Fair value attributed to the contingent liability updated by the SELIC rate Initial unit nominal value Initial unit nominal value Initial unit nominal value Statement of changes in equity [abstract] Statement of changes in equity [abstract] Social contribution taxes recoverable Social Contribution Taxes Recoverable The value of social contribution taxes recoverable. ICMS ICMS [Member] ICMS Total Provisions for employee benefits PSP VIVO Cycle 2025-2027 PSP VIVO Cycle 2025-2027 [Member] PSP VIVO Cycle 2025-2027 Payment to identified minority shareholders Payment to identified minority shareholders Payment to identified minority shareholders Receipts from reverse stock split and stock split Receipts from reverse stock split and stock split Receipts from reverse stock split and stock split Types of risks [domain] Types of risks [domain] Adjustments for gain (loss) on disposal of investments in subsidiaries, joint ventures and associates Adjustments for gain (loss) on disposal of investments in subsidiaries, joint ventures and associates Reserve for the share buyback program Reserve for the share buyback program Represents the amount of reserve for the share buyback program. Share repurchase program Share Repurchase Program [Member] This member stands for share repurchase program. Subsidiaries [axis] Subsidiaries [axis] Liabilities for the acquisition of a company Liabilities For The Acquisition Of A Company [Member] Represents the information pertaining to liabilities for the acquisition of a company. Amounts to be refunded to customers Other liabilities, amounts to be refunded to subscribers The amounts to be refunded to subscribers classified as other liabilities. Foreign currency swaps (US$ and CDI x US$) Foreign currency swaps (US$ and CDI x US$) [Member] This member stands for foreign currency swaps (US$ and CDI x US$) Foreign exchange variation on loans and financing Expenses On Foreign Exchange Variations On Loans And Financing The amount of expenses on foreign exchange variations on loans and financing. Interest paid Interest paid, classified as operating activities Number of treasury shares Number of treasury shares Number of treasury shares Net defined benefit liability (asset) [domain] Net defined benefit liability (asset) [domain] Total Restricted cash and cash equivalents Restricted cash and cash equivalents Number of shares issued and fully paid Number of shares issued and fully paid Direct equity interests in subsidiaries and jointly controlled companies Direct equity interests in subsidiaries and jointly controlled companies [Text Block] Direct equity interests in subsidiaries and jointly controlled companies Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Net debt Net debt Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Derivative financial instruments Non Current Non-current derivative financial liabilities Obligation related to amounts due to unidentified shareholders or shareholders with incomplete registration information Obligation related to amounts due to unidentified shareholders or shareholders with incomplete registration information Obligation related to amounts due to unidentified shareholders or shareholders with incomplete registration information Desenrola Program Desenrola Program [Member] Desenrola Program Net interest on equity Interest on Equity, Net Value After Withholding Income Tax The net value of interest on equity after withholding income tax. Discount related to renegociations Discount related to renegociations Discount related to renegociations Net payments of receipts from financial investments Net payments of receipts from financial investments The amount of net payments of receipts from financial investments TOTAL LIABILITIES AND EQUITY Equity and liabilities Equity and liabilities Contributions made by the Company and its subsidiaries Employers contribution to defined contribution plan The amount of employers contribution to defined contribution plan. Disclosure of personnel, social charges and benefits [Table] Disclosure of personnel, social charges and benefits [Table] Disclosure of personnel, social charges and benefits Schedule of trade accounts payable Disclosure of Trade and Other Payables [Table Text Block] The disclosure of trade and other payables. 2034 2034 [Member] 2034 Business combinations [domain] Business combinations [domain] Telefonica Venezolana Telefonica Venezolana This member stands for Telefonica Venezolana. Indexation accruals on assets and liabilities Indexation Accruals On Assets And Liabilities Amount of Indexation accruals on assets and liabilities Other comprehensive income, net of taxes through changes in the health plan for employees and retirees Other comprehensive income, net of taxes through changes in the health plan for employees and retirees Other comprehensive income, net of taxes through changes in the health plan for employees and retirees Beginning balance of provision for credit losses in the financial assets account. Ending balance of provision for credit losses in the financial assets account. Provision for credit losses on financial assets account Provision for credit losses on financial assets account Terra Networks Brazil Terra Networks Brasil LTDA [Member] Terra Networks Brasil LTDA Joint ventures [domain] Joint ventures [domain] Leases Leases [Member] This member stands for leases. Switching and transmission equipment and media Switching and transmission equipment and media This member stands for switching and transmission equipment and media. Estimated losses on impairment of accounts receivable Estimated losses on impairment of accounts receivable This member stands for estimated losses on impairment of accounts receivable. Consolidated Statements of Income IFRS Statement [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. CyberCo Brasil CyberCo Brasil [Member] CyberCo Brasil Provisions Probable losses provisions Amount of probable losses in provisions. Judicial deposit related to an acquisition Judicial Deposit For Business Acquisition Amount of judicial deposit made by the entity relating to business acquisitions. Fine for non-compliance with environmental legislation Fine for non-compliance with environmental legislation Fine for non-compliance with environmental legislation Gains from the reversal of financial expenses of monetary update of provisions for contingencies Gains from the reversal of financial expenses of monetary update of provisions for contingencies Gains from the reversal of financial expenses of monetary update of provisions for contingencies The Fair Value of the Brand The Fair Value of the Brand The amount of the fair value of the brand Disclosure of taxes, fees and contributions payable [Line Items] Disclosure of taxes, fees and contributions payable [Line Items] Disclosure of taxes, fees and contributions payable City Area Code City Area Code Additions Changes in Borrowings The amount of changes in borrowings. United States of America, Dollars United States of America, Dollars Disclosure of net defined benefit liability (asset) [table] Disclosure of net defined benefit liability (asset) [table] Lease amounts relating to estimated impairment losses on accounts receivable Lease amounts relating to estimated impairment losses on accounts receivable Lease amounts relating to estimated impairment losses on accounts receivable Term of Conduct Adjustment ("TAC") signed with ANATEL Term of Conduct Adjustment Signed with ANATEL [Member] This member stands for Term of Conduct Adjustment ("TAC") signed with ANATEL. Related-party receivables Other assets Other receivables due from related parties The amount of other receivables due from related parties. Excludes trade receivables. Percentage of shares issued Percentage of shares issued The percentage of shares issued. Categories of financial liabilities [domain] Categories of financial liabilities [domain] Merger of companies, Company Merger of companies, Company Merger of companies, Company Share cancellation - share buyback program Share cancellation - share buyback program Share cancellation - share buyback program BALANCES AND TRANSACTIONS WITH RELATED PARTIES Disclosure of related party [text block] IOE, Gross amount IOE, Gross amount Interest on equity, gross The gross amount of interest on equity relating to the current year, recognised as distributions to owners of the parent Acquisitions through business combinations, Non-controlling shareholders Acquisitions through business combinations, Non-controlling shareholders Acquisitions through business combinations, Non-controlling shareholders DIVIDENDS AND INTEREST ON EQUITY Disclosure Of Dividends And Interest On Equity [Text Block] The entire disclosure of dividends and interest on equity. Comprehensive income Income tax relating to components of other comprehensive income Ifrs Guarantee Obligations By Nature [Axis] Ifrs Guarantee Obligations By Nature [Axis] Information by nature of guarantee. Liabilities with related parties Liabilities With Related Parties [Member] This member stands for Liabilities with related parties member. Description of accounting policy for expenses [text block] Description of accounting policy for expenses [text block] Disclosure of classes of share capital [table] Disclosure of classes of share capital [table] Revenue breakdown Disclosure of disaggregation of revenue from contracts with customers [line items] Share capital reduction Share capital reduction Share capital reduction Maximum amount of reduction in capital stock requested Maximum Amount of Reduction in Capital Stocks Request Represents the maximum amount of reduction in capital stock requested to ANATEL. Debentures Debentures This member stands for debenture borrowings. Schedule of balance of amounts payable relating to finance leases Schedule of Components of Balance of Amounts Payable for Finance Leases by Lessee Tabular disclosure of components of balance of amounts payable for finance leases by the lessee. Increase (decrease) through transactions with owners, equity Increase (decrease) through transactions with owners, equity Past due status [axis] Past due status [axis] 50% depreciation 50% depreciation This member stands for scenario of fifty percentage downward variation. Cash and cash equivalents Cash and cash equivalents, related party transactions The amount of cash and cash equivalents resulting from related party transactions. Non-current liabilities [abstract] Non-current liabilities [abstract] SHARE-BASED PAYMENT PLANS Disclosure of share-based payment arrangements [text block] Disclosure of detailed information about intangible assets [abstract] Disclosure of detailed information about intangible assets [abstract] Total Deferred income including contract liabilities fair value of the net assets fair value of the net assets fair value of the net assets Services and goods Trade And Other Receivables Services And Goods The amount receivable from services and goods. Noncurrent financial assets Fair value Non-current financial assets, at fair value The fair value of non-current financial assets. Schedule of prepaid expenses Disclosure of prepayments and other assets [text block] Total net exposure in each scenario Net exposure, market risk The amount of net credit exposure to market risk. Inflation rates Inflation rates This member stands for inflation interest rate. TIS TIS [Member] TIS Noncurrent liabilities Non-current net defined benefit liability CDI CDI This member stands for interbank deposit certificate rate. Current financial liabilities Book value Current financial liabilities Cash flows from operating activities, Write-offs (payments) Cash Flows from Operating Activities, Write-offs (Payments) The amount of write-offs or payments from cash flows from operating activities. Non-current loans and financing recognized at the acquisition date Non-current loans and financing recognized at the acquisition date Non-current loans and financing recognized at the acquisition date Financial applications - LFT Financial Investments in Treasury Financial Bills Financial Investments in Treasury Financial Bills Loans and financing, debentures, leases and other creditors, net of judicial deposits Loans and financing, debentures, leases and other creditors, net of judicial deposits Loans and financing, debentures, leases and other creditors, net of judicial deposits Provisions Provisions, Non-current, Recognised as of Acquisition Date The amount recognised as of the acquisition date for provisions, non-current. Classes of other provisions [axis] Classes of other provisions [axis] Share Repurchase Program, Authorized, Number of Shares Share Repurchase Program, Authorized, Number of Shares Schedule of judicial deposits and garnishments Judicial deposits and garnishments [table text block] Tabular disclosure of judicial deposits and garnishments. Telefonica Global Technology Telefonica Global Technology This member stands for Telefonica Global Technology. Income tax and social contribution levied on all amounts recognized in other comprehensive income Income tax and social contribution levied on all amounts recognized in other comprehensive income Income tax and social contribution levied on all amounts recognized in other comprehensive income Classes of current inventories [abstract] Classes of current inventories [abstract] Interim dividends Interim dividends Interim dividends Short position Derivative financial liabilities Telefnica Infraestrutura e Segurana Ltda. Telefnica Infraestrutura e Segurana Ltda. [Member] This member stands for Telefnica Infraestrutura e Segurana Ltda. Common shares Ordinary shares [member] Other P&E assets Other P&E assets This member stands for other property plant and equipment assets. Allowance for credit losses Allowance for credit losses [member] Dividend and interest on equity approval dates [domain] Dividend and interest on equity approval dates [domain] This member stands for dividend and interest on equity approval dates. DISCLOSURE OF OTHER MATTERS DISCLOSURE OF OTHER MATTERS [Text Block] DISCLOSURE OF OTHER MATTERS Investments, Equity Transactions Investments, Equity Transactions Amount of equity transactions recorded on investments. Other assets Other current assets recognised as of acquisition date The amount recognised as of the acquisition date for other current assets acquired in a business combination. Gross carrying amount Gross carrying amount [member] Trade accounts payable Trade and other current payables INVENTORIES Disclosure of inventories [text block] Other liabilities Adjustments for increase (decrease) in other liabilities IGPM IGPM This member stands for general price index market (IGPM). 2026 2026 Not later than one year [member] Schedule of guarantees for several commitments Schedule of Guarantees of Contingencies [Table Text Block] Tabular disclosure of each guarantee obligation by type of contingency. Current tax liabilities Current tax liabilities Financial liabilities at fair value through profit or loss, category Financial liabilities at fair value through profit or loss, category [member] Impairment losses - trade accounts receivable Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss, trade and other receivables Maximum value to be used in the shares repurchase program Maximum value to be used in the shares repurchase program Maximum value to be used in the shares repurchase program Possible losses of regulatory contingencies Possible losses of regulatory contingencies Possible losses of regulatory contingencies Inventories Adjustments for decrease (increase) in inventories Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control [member] Business combination Increase decrease in borrowings related to business combination The amount of increase (decrease) in borrowings relating to business combination. TRADE ACCOUNTS RECEIVABLE Disclosure of financial assets [line items] Fair value of commitments Liabilities incurred Tax(1) Provision for taxes other than income tax [member] Description of accounting policy for property, plant and equipment PROPERTY, PLANT AND EQUIPMENT Description of accounting policy for property, plant and equipment [text block] Total consideration for acquisition Consideration transferred, acquisition-date fair value Additions from loans and debentures Proceeds from borrowings, classified as financing activities Market risk Market risk [member] Euribor Euribor [Member] Euribor Movements in result, Non-controlling shareholders Increase Decrease Through Changes in Equity Attributable to Movements in result Increase Decrease Through Changes in Equity Attributable to Movements in result. Loss on derivative transactions Losses on change in fair value of derivatives Schedule of the authorizations for use of radio frequency bands, granted to the Company, according to the terms of authorization to operate the service in each region Disclosure Of Authorizations For Use Of Radio Frequency Bands, Explanatory [Table Text Block] " The disclosure of the authorizations for use of radio frequency bands." Disclosure of impairment loss and reversal of impairment loss [abstract] Disclosure of impairment loss and reversal of impairment loss [abstract] Celular De Telefonia Celular De Telefonia [Member] Celular De Telefonia Incremental costs in obtaining contracts with customers Prepaid Incremental Costs The amount recognised as a asset for expenditures made prior to the period when the economic benefit will be realised with respect to incremental costs IFRS 15. Current raw materials Current raw materials Disclosure of risk management strategy related to hedge accounting [table] Disclosure of risk management strategy related to hedge accounting [table] Net changes of derivative financial instruments [Domain] Net changes of derivative financial instruments [Domain] Net changes of derivative financial instruments Weighted average number of ordinary shares used in calculating diluted earnings per share Weighted average number of ordinary shares used in calculating diluted earnings per share Floating interest rate Floating interest rate [member] Variable income investments Equity instruments, amount contributed to fair value of plan assets Samauma Samauma Brands Comércio, Importação e Exportação de Eletro-eletrônicos Ltda. [Member] Samauma Brands Comércio, Importação e Exportação de Eletro-eletrônicos Ltda. Average royalty rate on net revenue Average royalty rate on net revenue Average royalty rate on net revenue Classes of intangible assets other than goodwill [domain] Classes of intangible assets other than goodwill [domain] Disclosure of joint ventures Disclosure of joint ventures [line items] Major components of tax expense (income) [abstract] Major components of tax expense (income) [abstract] Probable Probable This member stands for scenario of likely occurrence. PSP 2024-2026 II cycle PSP 2024-2026 II cycle [Member] PSP 2024-2026 II cycle Acquisitions through business combinations, investment property Acquisitions through business combinations, investment property Schedule of other capital reserves Disclosure of other capital reserves [Table Text Block] The tabular disclosure of other capital reserves. Currency risk affecting net amount receivable Net amount receivable on currency risk Currency risk affecting net amount receivable. Schedule of other liabilities Schedule of other liabilities [table text block] Tabular disclosure of other liabilities. Entity Accounting Standard Entity Accounting Standard Non-controlling shareholders Profit (loss), attributable to non-controlling interests Consolidated liability balances of the share compensation plans Consolidated liability balances of the share compensation plans Consolidated liability balances of the share compensation plans Equity [abstract] Equity [abstract] 03/28/2024 03/28/2024 [Member] 03/28/2024 Book Value Of Exchange Payable Book Value Of Exchange Payable Amount of book value of exchange payable. Business combination – Samauma Business combination – Samauma [Member] Business combination – Samauma Write-off due to the Commitment Agreement Associated with the Self-Composition Negotiations Write-off due to the Commitment Agreement Associated with the Self-Composition Negotiations Write-off due to the Commitment Agreement Associated with the Self-Composition Negotiations Other operating expenses Other operating expenses Other operating expenses Subclassifications of assets, liabilities and equities [abstract] Subclassifications of assets, liabilities and equities [abstract] Decrease Through Cancellation Of Contracts, Property, Plant And Equipment Decrease Through Cancellation Of Contracts, Property, Plant And Equipment The decrease in property, plant and equipment resulting from cancellation of contracts. Description of Accounting Policy for Provision and Contingencies Description of Accounting Policy for Provision and Contingencies [Policy Text Block] Description of Accounting Policy for Provision and Contingencies Disclosure of nature and extent of risks arising from financial instruments [abstract] Disclosure of nature and extent of risks arising from financial instruments [abstract] Cybersecurity Risk Role of Management [Text Block] Adjustments, Tax incentives on corporate income tax return adjustments Adjustments, Tax incentives on corporate income tax return adjustments The amount of for tax incentives on corporate income tax return adjustments. Vivo Pay FIDCs Vivo Pay FIDCs [Member] Vivo Pay FIDCs Gains (losses) on financial assets at fair value through other comprehensive income Other comprehensive income, net of tax, financial assets measured at fair value through other comprehensive income Provision for Universal Telecommunications Services Fund Other provision for possible losses of ANATEL under Universal Telecommunications Services Fund Amount of other provisions for possible losses under Brazil???s Telecommunications Regulatory Agency under Universal Telecommunications Services Fund . Additions Additions other than through business combinations, intangible assets other than goodwill Financial assets at fair value through other comprehensive income, category Financial assets at fair value through other comprehensive income, category [member] Nominal annual adjustment rate of pension benefits Actuarial assumption of expected rates of pension increases Disclosure of attribution of expenses by nature to their function [abstract] Disclosure of attribution of expenses by nature to their function [abstract] Vivo Pay II Investment Fund in Credit Rights Vivo Pay II Investment Fund in Credit Rights [Member] Vivo Pay II Investment Fund in Credit Rights Disclosure of temporary difference, unused tax losses and unused tax credits [table] Disclosure of temporary difference, unused tax losses and unused tax credits [table] Parent Parent [member] Auditor Firm ID Auditor Firm ID 1st series 1st series This member stands for non-privileged 1-serie public unsecured nonconvertible debentures. Net exposure in copper risk Net exposure, copper risk Net exposure, copper risk Fair value of Loan agreement between CloudCo Brasil and TCCT Fair value of Loan agreement between CloudCo Brasil and TCCT Fair value of Loan agreement between CloudCo Brasil and TCCT Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block] Book value per share Book value per share The amount, per share of book value. Company's participation in distribution of reserves Defined Benefit Plans, Distribution Of Reserves, Company's Participation The amount representing corresponding company's participation in the distribution of reserves under the defined benefit plan. Prepayments and accrued income including contract assets [abstract] Prepayments and accrued income including contract assets [abstract] Tax provisions Tax provisions [Member] Tax provisions 12/29/2025 12/29/2025 [Member] 12/29/2025 Schedule of other operating income (expenses) Disclosure Of Other Operating Income Expenses [Table Text Block] The tabular disclosure of other operating and expenses. Deferred tax credits from acquisition of property and equipment Deferred tax credits from acquisition of property and equipment The amount of deferred tax credits from acquisition of property and equipment. Description of accounting policy for investments INVESTMENTS Description of accounting policy for investments [text block] The description of the entity's accounting policy for investments which include but not limited to investments in subsidiaries and investments in jointly-controlled entities. Disclosure of taxes, fees and contributions payable [Table] Disclosure of taxes, fees and contributions payable [Table] Disclosure of taxes, fees and contributions payable Insurance, satellites and links and other PrepaymentsInsuranceSatellitesAndLinksAndOther The amount recognised as a asset for expenditures made prior to the period when the economic benefit will be realised with respect to insurance, satellite and links and others. Amount of fine imposed by ANATEL lawsuit Fine Imposed on the Entity in Administrative and Judicial Proceedings Lawsuit The amount of fine imposed on the entity by ANATEL in administrative and judicial proceedings lawsuit. Maximum number of shares repurchase Maximum number of shares repurchase Maximum number of shares repurchase Disability table ( as a percent) Disability table downward percentage Decrease in percentage for mortality table. OTHER ASSETS Disclosure of other assets [text block] FUST, FUNTTEL and FISTEL Other Provision for Possible Losses of Other Tax Proceedings Amount of other provisions for possible losses under other tax proceedings (FUST, FUNTTEl, FISTEL and EBC) Deferred income Current Current deferred income including current contract liabilities Schedule of distribution of capital Disclosure of distribution of capital [Table Text Block] The tabular disclosure of distribution of capital. Disclosure of personnel, social charges and benefits [Line Items] Disclosure of personnel, social charges and benefits [Line Items] Disclosure of personnel, social charges and benefits Operating (Expenses) income Operating expense (income) excluding cost of sales The amount of operating expense (income) excluding the cost of sales. Schedule of Company's ratio of consolidated debt to shareholders' equity Disclosure of Company's ratio of debt to equity [Table Text Block] The disclosure of Companys ratio of debt to equity. Telfisa Global BV Telfisa Global BV This member stands for Telfisa Global BV. Fair value of financial liabilities Financial liabilities, at fair value Write-offs, net Decrease Through Write Offs, Net, Deferred Income, Contractual Liabilities The decrease in deferred income from contractual liabilities resulting from write offs, net. JUDICIAL DEPOSITS AND GARNISHMENTS JUDICIAL DEPOSITS AND GARNISHMENTS n/a. Type of taxes [member] Type of taxes [member] Represents the types of taxes. Maximum Top of range [member] Disclosure of sponsoring company's projected contributions Disclosure of sponsoring company's projected contributions [table text block] The disclosure of sponsoring company's projected contributions. Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block] Updated fine aplied Updated fine aplied Updated fine aplied Payment of dividends and interest on equity Dividends and interest on equity recognised as distributions to owners of parent The amount of dividends and interest on equity recognised as distributions to owners of the parent. Weighted average share price Weighted average share price Scenario [Axis] Scenario [Axis] Other assets Non-current Other non-current assets Dividends and interest on equity payable Disclosure of dividends and interest on equity [line items] Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans Other taxes Other taxes [Member] Other taxes Cash flows from financing activities, Write-offs (payments) Cash Flows from Financing Activities, Write-offs (Payments) The amount of write-offs or payments from cash flows from financing activities. Other comprehensive income (losses) not to be reclassified into income (losses) in subsequent periods Other comprehensive income that will not be reclassified to profit or loss, net of tax Interest discount related to renegotiations Interest discount related to renegotiations Interest discount related to renegotiations Description of accounting policy for measuring inventories INVENTORIES Description of accounting policy for measuring inventories [text block] Movements in equity, Non-controlling shareholders Increase Decrease Through Changes in Equity Attributable to Movements in equity Increase Decrease Through Changes in Equity Attributable to Movements in equity. Schedule of composition of financial assets and liabilities Disclosure of composition of financial assets and liabilities [table text block] The disclosure of composition of financial assets and liabilities. Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Fine deals with coverage targets Fine Imposed on Coverage Targets in Procedure for Determination of Noncompliance with Obligations The amount of fine imposed on the entity by ANATEL in coverage targets. Operating revenues Operating Revenues, Related Party Transactions The amount of operating revenue arising from the rendering of services in related party transactions. PERSONNEL, SOCIAL CHARGES AND BENEFITS Disclosure of social charges and employee benefits [text block] The entire disclosure for personnel, social charges and benefits. Present value of DB plan obligations Defined benefit obligation, at present value IPCA IPCA This member stands for board consumer price index (IPCA). TFSP 2025-2027 cycle TFSP 2025-2027 cycle [Member] TFSP 2025-2027 cycle Other related parties Other related parties [member] Later than two months and not later than three months Later than two months and not later than three months [member] Reserve Reserve [Domain] Reserve Capital contributions in investees, Non-controlling shareholders Increase Decrease Through Changes in Equity Attributable to Capital contribution in investees Increase Decrease Through Changes in Equity Attributable to Capital contribution in investees. Annual increase in use of healthcare services according to age Annual increase in use of healthcare services according to age Percentage of annual increase in use of healthcare services according to age. IPNET Cloud Services and Systems Development Ltda. IPNET Cloud Services and Systems Development Ltda. [Member] IPNET Cloud Services and Systems Development Ltda. Assets held for sale Assets held for sale Assets held for sale Movements in result, Company Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity attributable to Movements in result Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity attributable to Movements in result. Other comprehensive income (losses) Other comprehensive income Other comprehensive income Past due status [domain] Past due status [domain] Types of share-based payment arrangements [axis] Types of share-based payment arrangements [axis] Depreciation and amortization Adjustments for depreciation and amortisation expense 1st Capital Reduction 1st Capital Reduction [Member] 1st Capital Reduction Reimbursement to monitor compliance Reimbursement to monitor compliance Reimbursement to monitor compliance Title of 12(b) Security Title of 12(b) Security Fair value of equity interest recognised on the acquisition date Fair value of equity interest recognised on the acquisition date Equity interests of acquirer Other non-current liabilities recognized at the acquisition date Other non-current liabilities recognized at the acquisition date Other non-current liabilities recognized at the acquisition date Surplus from post-employment benefit plans Actuarial assets per balance sheet Net defined benefit asset Leases, current Lease Liabilities, Related Parties, Current The amount of liabilities for leases with related parties, classified as current. Accruals and deferred income including contract liabilities [abstract] Accruals and deferred income including contract liabilities [abstract] Income before taxes Accounting profit Investment in Klubi Participaes S.A. Investment in Klubi Participaes S.A. [Member] This member stands for Investment in Klubi Participaes S.A. Disclosure of changes in defined benefit liability Disclosure of changes in defined benefit liability [Table Text Block] Disclosure of changes in defined benefit liability Other liabilities Miscellaneous other liabilities The amount of miscellaneous other liabilities. Variation in the general price index (IGP-DI) Variation in the general price index (IGP-DI) Variation in the general price index (IGP-DI) Fair value of the fixed and intangible assets Fair value of the fixed and intangible assets Fair value of the fixed and intangible assets Subsidiaries [domain] Subsidiaries [domain] Schedule of consolidated balances with the related parties Disclosure of balances with related parties [table text block] The disclosure of balances with related parties. Financial assets recognised as of acquisition date Financial assets recognised as of acquisition date Borrowings by name [axis] Borrowings by name [axis] Current financial assets Book value Current financial assets Settlement by offsetting judicial deposit Settlement by offsetting judicial deposit Settlement by offsetting judicial deposit Split of common shares Split of common shares Split of common shares Outstanding payments to identified shareholders Outstanding payments to identified shareholders Outstanding payments to identified shareholders Withholding tax rate (as a percent) Withholding income tax rate The percentage of withholding income tax rate. Post-employment benefits recognized in other comprehensive income (loss) Post-employment benefits recognized in other comprehensive income (loss) Post-employment benefits recognized in other comprehensive income (loss) Tax rate according to Brazilian tax law Tax rate according to Brazilian tax law Tax rate according to Brazilian tax law Legal reserve percentage of net profit for year Legal reserve percentage of net profit for year Legal reserve percentage of net profit for year Deferred tax (Liabilities), without considering the subsidiary's deferred tax assets Deferred tax (Liabilities), without considering the subsidiary's deferred tax assets Deferred tax (Liabilities), without considering the subsidiary's deferred tax assets Description Of Accounting Policy For Pensions Plans And Other Post-Employment Benefits [Text Block] Description Of Accounting Policy For Pensions Plans And Other Post-Employment Benefits [Text Block] Description Of Accounting Policy For Pensions Plans And Other Post-Employment Benefits Switching and transmission equipment Switching and transmission equipment This member stands for switching and transmission equipment. JUDICIAL DEPOSITS AND GARNISHMENTS Type of taxes [Line Items] Represents the details pertaining to taxes. Disclosure of detailed information about intangible assets [line items] Disclosure of detailed information about intangible assets [line items] Noncurrent financial assets Book value Non-current financial assets Non-controlling interest in acquiree recognised at acquisition date Non-controlling interest in acquiree recognised at acquisition date FINANCIAL INSTRUMENTS AND RISK AND CAPITAL MANAGEMENT Description of accounting policy for financial instruments [text block] Gains (losses) on disposals of investments Gains (losses) on disposals of investments 09/22/2025 09/22/2025 [Member] 09/22/2025 Provisions for legal, labor, tax civil and regulatory contingencies Provisions for legal, labor, tax civil and regulatory contingencies This member stands for provisions for legal, labour, tax civil and regulatory contingencies. State Value-Added Tax (ICMS) State Value-Added Tax (ICMS) This member stands for state value-added tax (ICMS). Income statement Deferred tax expense (income) recognised in profit or loss Write-offs (amortizations) Write-offs (amortizations) Amortisation, assets recognised from costs incurred to obtain or fulfil contracts with customers Beginning balance Ending balance Assets recognised from costs to obtain or fulfil contracts with customers Taxes, charges and contributions payable Non-current Current tax liabilities, non-current Judicial deposits and garnishments Judicial deposits and garnishments (Note 10) This member stands for Judicial deposits and garnishments. 2nd series 2nd series This member stands for non-privileged 2-series public unsecured nonconvertible debentures. Vivo Money FIDC Investment Fund Receivables Amount of receivables for credit rights from investment funds. Equity pickup Tax effects of equity pickup, net of effects from interest on equity received and surplus value of the assets purchased The amount representing the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that equity pickup, net of effects from interest on equity received and surplus value of the assets purchased attributed to the company. Disclosure of transactions between related parties [table] Disclosure of transactions between related parties [table] Withholding tax on Interest on equity Withholding tax on Interest on equity Withholding tax on Interest on equity Depreciation, property, plant and equipment Depreciation, property, plant and equipment Civil proceedings of a non-consumer nature Provisions for civil contingencies assessed as probable losses relating to civil proceedings of a non-consumer nature all arising in the ordinary course of business Provisions relating to various civil proceedings related to a non-consumer nature at administrative and judicial levels, all arising in the ordinary course of business. Attribution of expenses by nature to their function [axis] Attribution of expenses by nature to their function [axis] Personnel, social charges and benefits Current Current provisions for employee benefits Difference from change in actuarial assumptions Actuarial gains (losses) arising from changes in demographic and financial assumptions, net defined benefit liability (asset) The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic and financial assumptions that result in remeasurements of the net defined benefit liability (asset). Disclosure of non-adjusting events after reporting period [table] Disclosure of non-adjusting events after reporting period [table] Present value of defined benefit obligation prior-year actuarial assumptions Present value of defined benefit obligation prior-year actuarial assumptions [Member] Present value of defined benefit obligation prior-year actuarial assumptions Income taxes recoverable Income Taxes Recoverable The amount of income taxes recoverable. PROPERTY, PLANT AND EQUIPMENT Disclosure of property, plant and equipment [text block] State of São Paulo Amnesty Program State of São Paulo Amnesty Program [Member] State of São Paulo Amnesty Program Mortality table for disabled individuals (as a percent) Decrease in percentage of Mortality table for disabled individuals Decrease in percentage for mortality table for disabled female individuals. Components of equity [domain] Components of equity [domain] Debt appreciation risk for payables in US dollars Debt appreciation risk for payables in US dollars This member stands for Debt appreciation risk for payables in US dollars. other comprehensive income (equity) other comprehensive income (equity) other comprehensive income (equity) Insider Trading Policies and Procedures Adopted Income available to be distributed Income available for distribution The amount of income available for distribution. Loans to participants Loans to participants Loans to participants Range [domain] Range [domain] Classes of contingent liabilities [axis] Classes of contingent liabilities [axis] Related parties Trade accounts payable Trade Payables To Related Parties The amount of trade payables due to related parties. Interest receivable (customers, taxes and other) Interest income CONTRACTUAL COMMITMENTS AND GUARANTEES CONTRACTUAL COMMITMENTS AND GUARANTEES No definition available. Scenario [Domain] Scenario [Domain] Other non current Liabilities Other non current Liabilities recognised as of acquisition date Represents other non current Liabilities recognised as of acquisition date. Cost of goods sold Cost relating to goods sold The amount of cost of goods sold. Provision of security services with Telefónica Cybersecurity Tech, S.L.U. Provision of security services with Telefónica Cybersecurity Tech, S.L.U. Provision of security services with Telefónica Cybersecurity Tech, S.L.U. Companhia AIX Participacoes Companhia AIX Participacoes This member stands for Companhia AIX Participaes. Income and social contribution tax expenses, at the tax rate of 34% Tax Expense Income Income Tax And Social Contribution Tax At Combined Tax Rate Tax expense (income) including income tax and social contribution tax at applicable tax rates. Other Assets Disclosure [Table] Other Assets Disclosure [Table] Disclosure of information about other assets. Liabilities for the acquisition of a company Liabilities Related to Business Combination [Member] This member stands for liabilities that are related to business liabilities. Address Type [Domain] Address Type [Domain] Principal amount Total nominal value or nominal amount Notional amount Reserve of cash flow hedges Reserve of cash flow hedges [member] Controlling interest in acquiree recognised Controlling interest in acquiree recognised Controlling interest in acquiree recognised Regulatory amnesty Regulatory amnesty [Member] Regulatory amnesty Telefónica Chile Telefonica Chile SA [Member] This member stands for Telefonica Chile S.A. VivaE Educação Digital S.A. ("VIVAE") VivaE Educação Digital S.A. ("VIVAE") [Member] This member stands for VivaE Educacao Digital S.A. Basic and diluted earnings per common share (in R$) Diluted earnings (loss) per share Maturity [domain] Maturity [domain] Categories of financial liabilities [axis] Categories of financial liabilities [axis] 06/26/2024 06/26/2024 [Member] 06/26/2024 Hedge (assets position) derivatives depreciation risk in US dollars Hedge (assets position) derivatives depreciation risk in US dollars Hedge (short position) derivatives depreciation risk in US dollars. Business combination Business combination [Member] Business combination Payment of non-compete clause Payment of non-compete clause Payment of non-compete clause Trade accounts payable and other payables, current Trade Payables And Other Payables To Related Parties, Current The amount of trade payables and other payables due to related parties, classified as current. Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Trade accounts receivable Fair value of acquired receivables Reimbursement period Reimbursement period The period of time for reimbursement. Cash And Cash Equivalents, Current, Related Party Transactions Cash And Cash Equivalents, Current, Related Party Transactions The amount of cash and cash equivalents classified as current, resulting from related party transactions. Other financial income Other finance income Net balance of these rights and obligations payable Amount payable to cover the net balance of rights and obligations The amount payable to cover the net balance of rights and obligations to mitigate the foreign exchange risk. Third-party withholdings Other liabilities, third party withholdings The amount of third party withholdings classified as other liabilities. Maturity analysis for contractual commitment Disclosure Of Maturity Analysis For Contractual Commitment [Line Items] Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. 2028 2028 Later than two years and not later than three years [member] Effects on the financial result of fair value adjustments Adjustments for gains (losses) on change in fair value of derivatives Defined benefit liability projected by the current medical cost growth rate Defined benefit liability projected by the current medical cost growth rate Defined benefit liability projected by the current medical cost growth rate Cash and cash equivalents [abstract] Cash and cash equivalents [abstract] Capital transaction on changes in investments Capital transaction on changes in investments Capital transaction on changes in investments Non-convertible debentures, of the unsecured type Non-convertible debentures, of the unsecured type This member stands for non-privileged series public unsecured nonconvertible debentures. Financial income (expenses), net Finance income (cost) Disclosure of detailed information about borrowings [table] Disclosure of detailed information about borrowings [table] Sensitivity analysis assumptions Disclosure of sensitivity analysis for actuarial assumptions [line items] Social contribution tax rate Social contribution tax rate The social contribution tax rate. Threshold business days for exponential convention Threshold business days for exponential convention Threshold exponential convention days was used to determine coupon rates of positions indexed in foreign currencies. Terminal equipment Terminal equipment Terminal Equipment [Member] Schedule of inventories Ifrs schedule of Inventory, Current [Table Text Block] Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. Consolidated Statements of Changes in Equity Statement of changes in equity [line items] Percentage of reduction of changes in financial and operational Percentage of reduction of changes in financial and operational Percentage of reduction of changes in financial and operational Attributable to: Comprehensive income attributable to [abstract] Disclosure of projected results Disclosure of projected results [table text block] The disclosure of projected results. Financial income (expenses) Net Income (Loss), Related Party Transactions The amount of net income (loss) arising from the related party transactions. States of São Paulo and Paraná Amnesty Program States of São Paulo and Paraná Amnesty Program [Member] States of São Paulo and Paraná Amnesty Program Balance at beginning of the year Balance at end of the year Reconciliation of Cash flow Financing Activities The amount of cash flows from financing activities. Financial investments Financial investments This member stands for Financial Investments. Other liabilities, current Other current payables to related parties The current portion of other payables due to related parties excludes trade payables. Insider Trading Policies and Procedures: PSP VIVO Cycle 2024-2026 PSP VIVO Cycle 2024-2026 [Member] PSP VIVO Cycle 2024-2026 Deferred income tax and social contribution on the allocation of fair value attributed to the contingent liability Deferred income tax and social contribution on the allocation of fair value attributed to the contingent liability Deferred income tax and social contribution on the allocation of fair value attributed to the contingent liability Transaction value of Exchange Risk Transaction value of Exchange Risk Transaction value of Exchange Risk Amount refunded to customers Amount Refunded To Customers The amount of refunded to customers. Current Current [member] Statement of financial position [abstract] Statement of financial position [abstract] Other operating income (expense) Total Other operating income (expense) Cover [Abstract] Cover [Abstract] Payment for acquisitions of shares for treasury Payments to acquire or redeem entity's shares Balance of legal reserves Income reserves A component of equity representing the entity's cumulative undistributed earnings or deficit reserved for legal, expansion and modernization, and tax incentives. Currency risk affecting net amount payable Net amount payable on currency risk The net amount payable on currency risk. Defined benefit plans [axis] Defined benefit plans [axis] Hedge (active position) derivatives risk of Euribor drop Hedge (active position) derivatives risk of Euribor drop [Member] This member stands for hedge (active position) derivatives risk of Euribor drop. Change in liability provision Adjustment for change in liability provision Adjustment for change in liability provision Percentage of common shares cancelled Percentage of common shares cancelled Percentage of common shares cancelled Loans, financing, debentures and leases Loans Financing Debentures And Leases Current The amount of current value of loans, financing debentures and Leases. VSS Business Acquisition VSS [Member] Business Acquisition VSS Disclosure of sensitivity analysis for actuarial assumptions [table] Disclosure of sensitivity analysis for actuarial assumptions [table] Telefónica Innovación Digital Telefónica Innovación Digital [Member] Telefónica Innovación Digital Acquisitions through business combinations, Company Acquisitions through business combinations, Company Acquisitions through business combinations, Company Entity Shell Company Entity Shell Company Period of which investment started Period of Which Investment Started Period of which investment had started. Indemnification assets recognised as of acquisition date Indemnification assets recognised as of acquisition date Interest expense Adjustments for interest expense Telefonica Moviles del Uruguay Telefonica Moviles del Uruguay [Member] Telefonica Moviles del Uruguay BASIS OF PREPARATION AND PRESENTATION OF FINANCIAL STATEMENTS Disclosure of basis of preparation of financial statements [text block] Reconciliation of assets and liabilities: Surplus (deficit) in plan [abstract] Other Creditors Other Creditors [Member] Other Creditors Current liabilities Current liabilities recognised as of acquisition date Document Fiscal Period Focus Document Fiscal Period Focus Schedule of breakdown of swaps maturing after December 31, 2021 Disclosure of breakdown of maturity of swaps [table text block] The disclosure of breakdown of maturity of swaps. Customer portfolio Customer portfolio [Member] Customer portfolio TOTAL ASSETS Assets Assets Interest and correction amount on fine imposed by ANATEL lawsuit Interest and Correction Amount in Administrative and Judicial Proceedings Lawsuit The amount of interest and corrections in the administrative and judicial proceedings lawsuit imposed by ANATEL. Expenses Current service cost and interest expense (income), net defined benefit liability (asset) The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period and the passage of time. Tax benefit related to interest on equity allocated Tax effects of interest on equity allocated The amount representing the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that tax benefit related to interest on equity allocated. TAXES, CHARGES AND CONTRIBUTIONS PAYABLE TAXES, CHARGES AND CONTRIBUTIONS PAYABLE [Table Text Block] TAXES, CHARGES AND CONTRIBUTIONS PAYABLE Types of interest rates [axis] Types of interest rates [axis] Additions Increase Through Additions, Assets Recognised From Costs To Obtain Or Fulfil Contracts With Customers The increase in assets recognised from the costs to obtain or fulfil contracts with customers resulting from additions. Salaries and wages Salaries and wages [Member] Salaries and wages Entity Address, City or Town Entity Address, City or Town Foreign currency swaps US$ Foreign currency swaps US$ [Member] This member stands for Foreign currency swaps US $. LOANS, FINANCING, DEBENTURES, LEASE, 5G LICENSES AND LIABILITIES FOR THE ACQUISITION OF A COMPANY Disclosure of borrowings [text block] Capital Issued capital [member] Fistel Fistel [Member] Fistel Non-current assets Other noncurrent assets recognised as of acquisition date The amount recognised as of the acquisition date for other noncurrent assets acquired in a business combination. Entity Emerging Growth Company Entity Emerging Growth Company Reversal of expenses with monetary updating of provisions for legal claims due to adherence to tax amnesty programs Reversal of expenses with monetary updating of provisions for legal claims due to adherence to tax amnesty programs Reversal of expenses with monetary updating of provisions for legal claims due to adherence to tax amnesty programs Reversal of expenses of provisions for legal claims Reversal of expenses of provisions for legal claims Reversal of expenses of provisions for legal claims TRADE ACCOUNTS PAYABLE Description of accounting policy for trade and other payables [text block] Net exposure in hedge CDI position Net exposure in hedge CDI position, market risk The amount of net credit exposure to market risk in hedge CDI position. IFRS Inventory, Current [Table] IFRS Inventory, Current [Table] Disclosure of information about inventories expected to be sold or consumed within one year or operating cycle, if longer. Withholding taxes and contributions Withholding taxes and contributions The amount of withholding taxes and contributions. Number of active executives Number of active company executives The number of active executives in the company. Swap contract [member] Swap contract [member] Notional value for liabilities position Notional value for derivative liabilities Notional value for derivative liabilities. Disclosure of other matters [Table] Disclosure of other matters [Table] Disclosure of other matters Interim interest on equity and dividends Interest on equity and dividends, gross amount The gross amount of interest on equity and dividend. Income and social contribution taxes on tax losses Income and social contribution taxes on tax losses This member stands for income and social contribution taxes on tax losses. Entity Address, Postal Zip Code Entity Address, Postal Zip Code Disclosure of nature and extent of risks arising from financial instruments [line items] Disclosure of nature and extent of risks arising from financial instruments [line items] Leases, non-current Lease Liabilities, Related Parties, Noncurrent The amount of liabilities for leases with related parties, classified as non-current. INCOME AND SOCIAL CONTRIBUTION TAXES Disclosure of income tax [text block] Net transfers Increase (decrease) through transfers, intangible assets and goodwill Other current liabilities recognized at the acquisition date Other current liabilities recognized at the acquisition date Other current liabilities recognized at the acquisition date NET OPERATING REVENUE Description of accounting policy for recognition of revenue [text block] Other investments Other investments This member stands for other investments. Cybersecurity Risk Board of Directors Oversight [Text Block] Maximum number of common shares to be repurchased Maximum Number of Common Share to be Repurchase The maximum number of common shares to be repurchased under share repurchase program. 03/24/2025 03/24/2025 [Member] 03/24/2025 Brand cost and expenses Brand cost and expenses Brand cost and expenses Disclosure of impairment loss and reversal of impairment loss [table] Disclosure of impairment loss and reversal of impairment loss [table] Schedule of personnel, social charges and benefits Disclosure Of Employee Benefits [Table Text Block] Tabular disclosure of personnel, social charges and benefits. Debt risk of increase in IPCA Debt risk of increase in IPCA This member stands for debt risk of increase in IPCA. Light-Fraca Light-Fraca [Member] Light-Fraca Value of shares held in company Value of shares held in company Value of shares held in company IMPAIRMENT OF NONFINANCIAL ASSETS Disclosure of impairment loss and reversal of impairment loss [line items] Schedule of changes in leases and depreciation rates, after the adoption of IFRS 16, already included in the asset movement tables Disclosure Of Changes In Leases, After Adoption Of I F R S 16, Already Included In Asset Movement Tables, Explanatory The disclosure of detailed information about changes in leases, after the adoption of IFRS 16, already included in the asset movement tables. Loans - financial institutions Current loans and financing recognized at the acquisition date Current loans and financing recognized at the acquisition date Cybersecurity Risk Management Processes Integrated [Text Block] Amounts payable (operators, cobilling) Amount payable to operators and co-billing The amount payable to operators and co-billing. ANATEL ANATEL [Member] ANATEL Increase (decrease) through share-based payment transactions, equity Increase (decrease) through share-based payment transactions, equity Tax Amnesty and Refinancing Program Tax Amnesty and Refinancing Program [Member] Tax Amnesty and Refinancing Program PPE fair value attributed to Right of use assets PPE fair value attributed to Right of use assets PPE fair value attributed to Right of use assets OTHER OPERATING INCOME (EXPENSES) Disclosure of other operating income (expense) [text block] Other income with foreign exchange and monetary variation (judicial deposits, taxes and others) (1) Foreign exchange gain (loss) Non-deductible expenses, gifts, incentives Non-deductible expenses, gifts, incentives Non-deductible expenses, gifts, incentives Classes of property, plant and equipment [domain] Classes of property, plant and equipment [domain] Net interest on net defined benefit liability/asset Estimated net interest on net actuarial assets/liabilities Amount of estimated net interest on net actuarial assets/liabilities recognized related to defined benefit plan. Entity Address, Country Entity Address, Country Cloudco [Member] CloudCo [Member] CloudCo Euro Member Countries, Euro Euro Member Countries, Euro Non current Personal benefits recognised as of acquisition date Non current Personal benefits recognised as of acquisition date Non current Personal benefits recognised as of acquisition date Actuarial assets per balance sheet Actuarial assets per balance sheet Actuarial assets per balance sheet Preliminary summary of the fair value composition of the net assets acquired Preliminary summary of the fair value composition of the net assets acquired [Table Text Block] Preliminary summary of the fair value composition of the net assets acquired Schedule of income and social contribution taxes payable Disclosure of Income and Social Contributions Taxes Payable [Table Text Block] The disclosure of income and social contributions taxes payable. 07/25/2025 07/25/2025 [Member] 07/25/2025 Document Annual Report Document Annual Report Return on plan assets excluding interest income Decrease (increase) in net defined benefit liability (asset) resulting from return on plan assets excluding interest income or expense Losses (gains) on write-off/sale of assets Adjustments for losses (gains) on disposal of non-current assets Customer portfolio and trademarks Customer portfolio and trademarks This member stands for customer portfolio and trademarks. Telxius Cable Brasil Telxius Cable Brasil This member stands for Telxius Cable Brasil. Current income and social contribution taxes Combined Current Income Tax And Social Contribution Tax Expense Income And Adjustments For Current Tax Of Prior Periods The amount of combined current income and social contribution tax expense (income) and adjustments for the current tax of prior periods. NET OPERATING REVENUE Disclosure of revenue [text block] Unrealized gains (losses) on financial assets at fair value through other comprehensive income Other comprehensive income, before tax, financial assets measured at fair value through other comprehensive income Gain (loss) on the remeasurement of equity interest Gain (loss) on the remeasurement of equity interest Gain (loss) on the remeasurement of equity interest Schedule of non-current trade accounts receivable Disclosure of current and noncurrent trade accounts receivable, relating to finance lease [table text block] Tabular disclosure of current and noncurrent trade accounts receivable, relating to finance lease. Balance of contractual costs incurred Balance of contractual costs incurred Represents balance of contractual costs incurred . Trade accounts payable and other provisions Trade accounts payable and other provisions This member stands for trade accounts payable and other provisions. Foreign currency swaps Euro Foreign currency swaps Euro [Member] This member stands for Foreign currency swaps in Euro. NDF Copper NDF Copper [Member] NDF Copper Revaluation increase (decrease), property, plant and equipment Revaluation increase (decrease), property, plant and equipment IOE, Amount per Share, Net Interest on equity, per share The amount of interest on equity per share. Current assets Current assets recognised as of acquisition date Third-party services Third-party services expenses The amount of third-party services expenses. OTHER LIABILITIES Disclosure of other liabilities [text block] Average maturity on lease contracts Finance Lease, Average Maturity Period The average maturity period on finance leases. Net operating revenue Net operating revenue Net operating revenue Total Finance costs Write-offs due to the Company's adherence to tax amnesty programs Write-offs due to the Company's adherence to tax amnesty programs Write-offs due to the Company's adherence to tax amnesty programs Income tax and social contribution Liabilities recognised as of acquisition date Income tax and social contribution Liabilities recognised as of acquisition date Income tax and social contribution Liabilities recognised as of acquisition date Schedule of plans sponsored by the Company and its subsidiaries and related benefit types Schedule of plans sponsored by company and related benefit types [Table Text Block] The tabular disclosure for plans sponsored by the company and related benefit types. Acquisitions through business combinations, property, plant and equipment Acquisitions through business combinations, property, plant and equipment Liabilities with related parties Other Payables To Related Parties The amount of payables due to related parties. Excludes trade payables. Financial charges Prepaid financial charges The amount recognised as a asset for expenditures made prior to the period when the economic benefit will be realised with respect to financial charges. Schedule of provision contingencies Disclosure of Provision Contingencies [Table Text Block] The disclosure of provision contingencies. Total Other liabilities Gross interest on equity, per share Interest on Equity, Gross Value Per Share The per share gross value of interest on equity. Estimated impairment losses for accounts receivable roll forward Reconciliation of changes in allowance account for credit losses of financial assets [abstract] Actuarial gains (losses) and limitation effect of the assets of surplus plan Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans Tax credits for PIS and COFINS Tax Credits for PIS and COFINS Amount of tax credit arising from decisions from lawsuits for PIS and COFINS. Repayments Noncurrent borrowings undiscounted cash flows The amount of contractual undiscounted cash flows in relation to noncurrent borrowings. Taxes Income tax relating to remeasurements of defined benefit plans included in other comprehensive income Other comprehensive income that may be reclassified into income in subsequent periods Other comprehensive income that will be reclassified to profit or loss, net of tax Subletting Decrease Through Subletting Arrangements, Property, Plant And Equipment The decrease in property, plant and equipment through subletting arrangements. Schedule of changes in dividend and interest on equity Disclosure of changes in dividends and interest on equity [table text block] The disclosure of changes in dividends and interest on equity. Transaction costs Acquisition-related costs for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination (Net) result of transactions with derivatives Gain (loss) on hedge ineffectiveness Treasury Financial Letter (LFT) Treasury Financial Letter (LFT) This member stands for Treasury Financial Letter (LFT) fixed income investments. LIABILITIES AND EQUITY Equity and liabilities [abstract] Reduction of the Company's capital Reduction of the Company's capital [Member] Reduction of the Company's capital Net operating revenue Revenue from rendering of telecommunication services Derivative transactions, net Balance at the beginning of the fiscal year Balance at the end of the year Total Derivative assets (liabilities), net The amount of derivative assets less derivative liabilities. Loan, financing, debenture, leases charges and liabilities for the acquisition of a company Loan, financing, debenture, leases charges and liabilities for the acquisition of a company Interest income (expense) Entity Filer Category Entity Filer Category Amount arising from related parties Receivables From Corporate Events, Related Parties Represents the other receivables from corporatE events associated with related parties. Write Offs, Net Related To Cancellation Of Lease Agreements Write Offs, Net Related To Cancellation Of Lease Agreements The amount of write offs, net related to cancellation of lease agreements. Interest on actuarial liabilities Interest income on plan assets Interest on the asset limitation Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income) Decrease in the discount rate used to adjust the defined benefit liability to present value Decrease in the discount rate used to adjust the defined benefit liability to present value Decrease in the discount rate used to adjust the defined benefit liability to present value Vivo Pay FIDCs subscription of senior shares Vivo Pay FIDCs subscription of senior shares Vivo Pay FIDCs subscription of senior shares Controlling Group Controlling Group This member stands for controlling shareholders. Profit (loss) from operating activities Profit (loss) from operating activities Entity Address, Address Line Three Entity Address, Address Line Three Recognition of contingent liabilities Recognition of contingent liabilities Recognition of contingent liabilities Write-off of provision for credit losses on financial investors Write-off of provision for credit losses on financial investors Write-off of provision for credit losses on financial investors Other regulatory provisions Other regulatory provisions Other regulatory provisions Federal Other provision for possible losses of federal tax Amount of other provisions for possible losses under federal tax laws. FIDC shares / Others FIDC shares / Others This member stands for FIDC shares / Others fixed income investments. Entity Address, Address Line One Entity Address, Address Line One Deferred taxes Deferred tax (Liabilities), net Net deferred tax liabilities Entity Address, Address Line Two Entity Address, Address Line Two Universal Telecommunication Services Fund (FUST) Universal Telecommunication Services Fund (FUST) This member stands for universal telecommunication services fund (FUST). Debentures recognised as of acquisition date Current Debentures recognised as of acquisition date Current Debentures recognised as of acquisition date Net interest on net actuarial assets/liabilities Interest expense (income), defined benefit plans Medical service eligibility age Medical service eligibility age The medical service eligibility age used as a significant actuarial assumption to determine the present value of a defined benefit obligation. Deductions from gross operating revenue Deductions from gross operating revenue The amount of deductions from gross operating revenue. Summary of amounts recognized in other comprehensive income (loss) Disclosure of amounts recognized in other comprehensive income (loss) [table text block] The disclosure of amounts recognized in other comprehensive income (loss). Other Other adjustments to reconcile profit (loss) 08/26/2024 08/26/2024 [Member] 08/26/2024 Relevant cases [Axis] Relevant cases [Axis] Relevant cases Movements in equity, Company Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity attributable to Movements in equity Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity attributable to Movements in equity. Present value payable Minimum Finance Lease Payments Payable At Present Values The present value of minimum finance lease payments payable. Schedule of trade accounts receivables Disclosure of trade accounts receivables [table text block] Tabular disclosure of trade accounts receivable of an entity during the accounting period. Income reserves Income reserves [member] This member stands for component of equity representing the income reserve. Total Post employment Benefit Expenses Defined Benefit Plans The amount of post-employment benefit expense relating to defined benefit plans. [Refer: Defined benefit plans [member]] OTHER ASSETS Other Assets Disclosure [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Fair value of the business relationship Fair value of the business relationship Fair value of the business relationship Social Contribution Tax for Intervention in the Economic Order (CIDE) Social Contribution Tax for Intervention in the Economic Order (CIDE) This member stands for social contribution tax for intervention in economic order (CIDE). Other Other provisions for employee benefits [Member] Other provisions for employee benefits Estimated portfolio decline Estimated portfolio decline Estimated portfolio decline Sponsor contributions Estimated contributions to plan by employer, net defined benefit liability (asset) The decrease (increase) in net defined benefit liability (asset) resulting from estimated contributions to a defined benefit plan by the employer. Noncurrent financial liabilities Fair value Non-current financial liabilities, at fair value The fair value of non-current financial liabilities. Disclosure of financial assets [table] Disclosure of financial assets [table] Receipts (payments), net of judicial deposits Receipts Payments, Net of Judicial Deposits The amount of cash inflow (outflow) from receipts (payments), net of judicial deposits. Accumulated other comprehensive income Accumulated other comprehensive income Materials and other operating costs and expenses Material and other operating costs and expenses The amount of material and other operating costs and expenses. Types of Provisions [Axis] Types of Provisions [Axis] Types of Provisions Remuneration percentage of CDI Remuneration percentage of CDI Remuneration percentage of CDI Investments by the subsidiary Vivo Ventures Portion of gains (losses) recognised when control of subsidiary is lost, attributable to recognising investment retained in former subsidiary Personnel, social charges and benefits Adjustments for decrease (increase) in personnel, social charges and benefits Adjustments for decrease (increase) in personnel, social charges and benefits to reconcile profit (loss) to net cash flow from (used in) operating activities. Current liabilities [abstract] Current liabilities [abstract] Financing Activities Not Involving Cash And Cash Equivalents, Financial Charges, Fair Value Monetary And Exchange Rate Updates Financing Activities Not Involving Cash And Cash Equivalents, Financial Charges, Fair Value Monetary And Exchange Rate Updates The amount of financial charges and foreign exchange variation that do not involve cash and cash equivalents Customer-related intangible assets Customer-related intangible assets [member] PSP Cycle 2024-2026 PSP Cycle 2024-2026 [Member] PSP Cycle 2024-2026 Unrecognized deferred tax assets related to IR on tax losses and CS on negative basis on the accounting books Unrecognized deferred tax assets related to IR on tax losses and CS on negative basis on the accounting books Unrecognized deferred tax assets related to IR on tax losses and CS on negative basis on the accounting books BALANCES AND TRANSACTIONS WITH RELATED PARTIES Disclosure of transactions between related parties [line items] Loans and financing borrowings Loans and financing borrowings [member] This member stands for loans and financing borrowings. Excludes debenture borrowings. Classes of share capital [domain] Classes of share capital [domain] Capital subscriptions made by noncontrolling shareholders in subsidiaries Proceeds from Capital Subscriptions Made by Noncontrolling Shareholders in Subsidiaries The cash inflow from capital subscriptions made by noncontrolling shareholders in subsidiaries. Additional provisions inflows except income, other provisions Additional provisions inflows except income, other provisions The amount of inflows except income other provisions made Contact Personnel Email Address Contact Personnel Email Address Schedule of reconciliation of cash flow financing activities Disclosure of Reconciliation of Cash Flow Financing Activities [Table Text Block] Schedule disclosing information related to the reconciliation of cash flow financing activities. Classes of financial liabilities [axis] Classes of financial liabilities [axis] Classes of financial liabilities [domain] Classes of financial liabilities [domain] Types of taxes, charges and contributions payable [Axis] Types of taxes, charges and contributions payable [Axis] Types of taxes, charges and contributions payable Borrowings, adjustment to interest rate basis Borrowings, adjustment to interest rate basis State of Minas Gerais Amnesty Program State of Minas Gerais Amnesty Program [Member] State of Minas Gerais Amnesty Program Technological Innovation Law Technological Innovation Law This member stands for technological innovation law. Payment for acquisition of investments and capital contribution in subsidiary Other cash payments to acquire equity or debt instruments of other entities, classified as investing activities Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities Light-Forte, Álvaro Vindas Light-Forte, Álvaro Vindas [Member] Light-Forte, Álvaro Vindas Long-term assets Long-term assets Long-term assets Plan assets [member] Plan assets [member] Provisions for employee benefits Provisions for employee benefits [Member] Provisions for employee benefits Capital transaction for acquisition Capital transaction for acquisition Capital transaction for acquisition Revenue Loss Revenue Loss Revenue Loss Capital reduction [Axis] Capital reduction [Axis] Capital reduction Shareholding in the company Shareholding in the company Shareholding in the company Advertising and publicity Prepaid advertising and publicity The amount recognised as a asset for expenditures made prior to the period when the economic benefit will be realised with respect to advertising and publicity. Description of accounting policy for trade and other receivables TRADE ACCOUNTS RECEIVABLE Description of accounting policy for trade and other receivables [text block] Guarantee for legal proceedings Guarantee For Legal Proceedings Amount of guarantees for legal proceedings. Other shareholders Other shareholders This member stands for other shareholders. Swap contracted and fixed interest for CDI Swap contracted and fixed interest for CDI Swap contracted and fixed interest for CDI Capital Issued capital Number of share buybacks Ifrs Treasury Stock, Shares, Acquired Number of shares that have been repurchased during the period and are being held in treasury. Amortization period of non-compete clause Amortization period of non-compete clause Amortization period of non-compete clause Other intangible assets Other intangible assets [member] TAXES, CHARGES AND CONTRIBUTIONS PAYABLE [Abstract] TAXES, CHARGES AND CONTRIBUTIONS PAYABLE [Abstract] Categories of financial assets [axis] Categories of financial assets [axis] Total Income And Social Contribution Taxes Payable The amount of income and social contribution taxes payable. Total shares outstanding Number of shares outstanding Possible losses – tax contingencies Possible losses – tax contingencies [Member] Possible losses – tax contingencies Capital reduction [Domain] Capital reduction [Domain] Capital reduction Separate Separate [member] Products and services [axis] Products and services [axis] Financial liabilities Book value Financial liabilities Main themes Main themes [Member] Main themes Other property, plant and equipment Other property, plant and equipment [member] Income and social contribution taxes Tax debits Tax expense (income) Disclosure of other provisions [abstract] Disclosure of other provisions [abstract] Number of shares that each unit consists Share-Based Payment Arrangement, Number Of Shares That Each Unit Consists Number of shares that each unit consists, under the share-based payment arrangement. Quotas calculated on community telephone plans and expansion plans Quotas calculated on community telephone plans and expansion plans [Member] Quotas calculated on community telephone plans and expansion plans Total Estimate of contributions expected to be paid The amount of estimate of contributions expected to be paid. Mortality table for nondisabled individuals (as a percent) Decrease in percentage of Mortality table for nondisabled individuals Decrease in percentage for mortality table for nondisabled individuals segregated by gender. Document Transition Report Document Transition Report Trade accounts receivable Trade and other receivables PROVISION AND CONTINGENCIES Disclosure of other provisions, contingent liabilities and contingent assets [text block] TaxEffectOnExplorationProfit TaxEffectOnExplorationProfit The amount representing the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that equity pickup, net of effects from exploration profit. Equity valuation adjustment Equity valuation adjustment Amount of equity valuation adjustment. Reserve for remuneration and investments Reserve for remuneration and investments [Member] Reserve for remuneration and investments PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS Disclosure of defined benefit plans [line items] Regulatory provisions processes [Axis] Regulatory provisions processes [Axis] Regulatory provisions processes EQUITY Disclosure of classes of share capital [line items] PERSONNEL, SOCIAL CHARGES AND BENEFITS Description of Accounting Policy for Personnel, Social Charges and Benefits [Policy Text Block] The description of the entity's accounting policy for personnel, social charges and benefits. Foreign currency swaps (Euro and CDI x Euro) Foreign currency swaps (Euro and CDI x Euro) [Member] This member stands for Foreign currency swaps (Euro and CDI x Euro) Maturity [axis] Maturity [axis] Schedule of changes in borrowings Schedule of changes in borrowings [table text block] The tabular disclosure of changes in borrowings. Cash flows from financing activities, Additions Cash Flows from Financing Activities, Additions The amount of additions from cash flows from financing activities. Sale of goods Sale Of Goods [Member] This member stands for sale of goods (handsets, simcards and accessories) and equipment of the ???Soluciona TI??? Reversal of part of the remaining arising from the agreement in relation to the Post-Closing Adjustment Reversal of part of the remaining arising from the agreement in relation to the Post-Closing Adjustment Reversal of part of the remaining arising from the agreement in relation to the Post-Closing Adjustment Document Type Document Type Reserve of gains and losses on financial assets measured at fair value through other comprehensive income Reserve of gains and losses on financial assets measured at fair value through other comprehensive income [member] 2033 2033 [Member] 2033 Schedule of annual depreciation rates of property, plant and equipment Disclosure Of Depreciation Rates Of Property, Plant And Equipment, Explanatory The disclosure of detailed information about depreciation rates of property, plant and equipment. Nominal unit value Debentures, Nominal Unit Value The amount of nominal unit value of debentures issued. Profit or loss [abstract] Profit or loss [abstract] Lending equipment Lending equipment Lending Equipment [Member] VivaE and Vivo Ventures VivaE and Vivo Ventures [Member] VivaE and Vivo Ventures 04/11/2025 04/11/2025 [Member] 04/11/2025 Sundry suppliers (Opex, Capex, Services e Material) Trade payables Schedule of sensitivity analysis assumptions Disclosure of sensitivity analysis assumptions [table text block] The disclosure of sensitivity analysis assumptions. Net interest on equity, per share Interest on Equity, Net Value Per Share After Withholding Income Tax The per share net value of interest on equity after withholding income tax. Types of share-based payment arrangements [domain] Types of share-based payment arrangements [domain] Equity Equity Equity attributable to owners of parent Equity attributable to owners of parent Components of equity [axis] Components of equity [axis] Property and equipment Property and equipment (Note 13.f) [Member] This member stands for Property and equipment. Net exposure in IPCA in Euribor drop risk Net exposure in IPCA, Euribor drop risk Net exposure in IPCA, Euribor drop risk Withholding Income Tax (IRRF) Withholding Income Tax (IRRF) This member stands for withholding income tax (IRRF). Trade Receivables Due From Related Parties, Current Trade Receivables Due From Related Parties, Current The amount of trade receivables classified as current, resulting from related party transactions. Cancellation of common shares to be held in treasury Cancellation Of Common Shares To Be Held In Treasury Amount of cancellation of common shares to be held in treasury. Property, plant and equipment of small value Property, plant and equipment of small value This member stands for effects of property, plant and equipment of small value. Regulatory provisions processes [Domain] Regulatory provisions processes [Domain] Regulatory provisions processes Proposed additional dividends Proposed additional dividends [Member] This member stands for component of equity representing the additional proposed dividends. Actuarial losses (gains) adjusted by experience Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from experience adjustments TelefonicaGlobalTechnology TelefonicaGlobalTechnologyMember [Member] TelefonicaGlobalTechnologyMember Construction of high capacity backhaul infrastructure for alternative plans Construction of high capacity backhaul infrastructure for alternative plans Construction of high capacity backhaul infrastructure for alternative plans Categories of related parties [domain] Categories of related parties [domain] Other assets Current Other current assets Net effect on changes in current fair value Net effect on changes in current fair value under the assumptions of interest rate sensitivity analysis The amount of net effect on changes in current fair value under the assumptions of interest rate sensitivity analysis. Partial debt reversal through post-closing price adjustment - Garliava Acquisition Partial debt reversal through post-closing price adjustment - Garliava Acquisition Partial debt reversal through post-closing price adjustment - Garliava Acquisition Net exposure in IPCA Net exposure in IPCA, market risk The amount of net credit exposure to market risk in IPCA. Net changes of derivative financial instruments [Axis] Net changes of derivative financial instruments [Axis] Net changes of derivative financial instruments Debt appreciation risk for payables in Euro Debt appreciation risk for payables in Euro This member stands for Debt appreciation risk for payables in Euro. Provisions and contingencies Other non-current provisions Variable compensation Key management personnel compensation, variable compensation The amount of compensation to key management personnel in the form of variable compensation. Fair value of the customer portfolio Fair value of the customer portfolio Fair value of the customer portfolio Auditor Location Auditor Location Perpetual growth rate Perpetual growth rate Perpetual growth rate Total Taxes, Charges and Contributions Recoverable. Taxes, Charges and Contributions Recoverable. The amount of taxes, charges and contributions recoverable. Weighted average number of outstanding shares for the year Weighted average number of ordinary shares used in calculating basic earnings per share Business combination - Garliava (Nota 1.c.3) Increase (Decrease) Through Business Combinations, Assets Recognised From Costs To Obtain Or Fulfil Contracts With Customers The increase (decrease) in assets recognised from the costs to obtain or fulfil contracts with customers resulting from business combinations. Telefônica Transportes e Logística Ltda ("TGLog") TGLog This member stands for Telefonica Transportes e Logistica Ltda. Reversal of the monetary update of regulatory provisions Reversal of the monetary update of regulatory provisions Reversal of the monetary update of regulatory provisions Labor Labor This member stands for provision for labor. Social Security, work accident insurance (SAT) and funds to third parties (INSS) Social Security, work accident insurance (SAT) and funds to third parties (INSS) This member stands for Social Security, work accident insurance (SAT) and funds to third parties (INSS). Initial recognition of the investment Initial recognition of the investment Initial recognition of the investment Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Schedule of annual amortization rates for intangible assets Disclosure Of Annual Amortization Rates For Intangible Assets, Explanatory The disclosure of detailed information about annual amortization rates for intangible assets. Letters of guarantee Letters of guarantee - Legal proceedings (Note 20) This member stands for Letters of guarantee - Legal proceedings. General and administrative expenses through personnel expenses, charges, and social benefits General and administrative expenses through personnel expenses, charges, and social benefits General and administrative expenses through personnel expenses, charges, and social benefits Commercial Relationship Commercial Relationship [Member] Commercial Relationship Schedule of operating costs and expenses Disclosure of attribution of expenses by nature to their function [text block] Defined benefit plans [domain] Defined benefit plans [domain] Tax Refinancing and Amnesty Program Tax Refinancing and Amnesty Program [Member] Tax Refinancing and Amnesty Program Increase (decrease) in cash and cash equivalents Increase (decrease) in cash and cash equivalents after effect of exchange rate changes Annual increase in the use of medical services according to age Annual increase in the use of medical services according to age Annual increase in the use of medical services according to age Cybersecurity Risk Management Processes Integrated [Flag] Investments in subsidiaries, joint ventures and associates reported in financial statements Investments in subsidiaries, joint ventures and associates reported in financial statements Investments in subsidiaries, joint ventures and associates reported in financial statements FINANCIAL INSTRUMENTS AND RISK AND CAPITAL MANAGEMENT Disclosure of nature and extent of risks arising from financial instruments [text block] Entity Current Reporting Status Entity Current Reporting Status Receipts - derivative financial instruments Receipts Proceeds from derivative financial instruments The cash inflow from derivative financial instruments classified as financing activities. Schedule of significant components of deferred income and social contribution taxes Disclosure of deferred taxes [text block] Taxes, charges and contributions payable Taxes, charges and contributions payable [Member] Taxes, charges and contributions payable Salaries, benefits and social charges Key management personnel compensation, salaries, benefits and social charges The amount of compensation to key management personnel in the form of salaries, benefits and social charges. TFSP 2024-2026 cycle TFSP 2024-2026 cycle [Member] TFSP 2024-2026 cycle Threshold business days for linear convention Threshold business days for linear convention Threshold linear convention days was used to determine coupon rates of positions indexed in foreign currencies. Regulatory Regulatory This member stands for a provision for regulatory matters. Discount on outstanding balance related to renegotiations Discount on outstanding balance related to renegotiations Discount on remaining balance related to renegotiations Disclosure of classes of share capital [abstract] Disclosure of classes of share capital [abstract] Summary of total expenses recognized in the income statement Disclosure of total expenses recognized in the income statement [table text block] The disclosure of total expenses recognized in the income statement. Cost of sales Cost of sales Supplement to estimated losses, net of resersal Increase Decrease In Credit Loss Allowance Recognised In Profit Or Loss Increase Decrease In Credit Loss Allowance Recognised In Profit Or Loss Advances to employees and suppliers Advances To Employees And Suppliers The amount of advances made to employees and suppliers. Disclosure of subsidiaries [abstract] Disclosure of subsidiaries [abstract] Current Fiscal Year End Date Current Fiscal Year End Date Debt depreciation risk for receivables in Euro Debt depreciation risk for receivables in Euro This member stands for debt depreciation risk for receivables in Euro. Unbilled amounts Trade and other receivables unbilled amounts The amount receivable by unbilled amounts. Provision under Fund for Technological Development of Telecommunications Other provision for possible losses of ANATEL under Fund for Technological Development of Telecommunications Amount of other provisions for possible losses under Brazil???s Telecommunications Regulatory Agency under Fund for Technological Development of Telecommunications. Concession plans Concession plans Concession plans Amounts to be refunded to customers Amounts To Be Refunded To Customers [Member] This member stands for amounts to be refunded to customers. Distribution of PBS - A surplus Distribution Of Reserves The amount of distribution of reserves. Other operating income expense excluding provisions recoveries and gain loss on disposals Other operating income expense excluding provisions recoveries and gain loss on disposals The amount of expenses related to other operating income (expenses). Disclosure Of Maturity Analysis Of Deferred Income From Contractual Liabilities [Table] Disclosure Of Maturity Analysis Of Deferred Income From Contractual Liabilities [Table] Schedule disclosing information related to the maturity analysis for deferred income from contractual liabilities. SP Telecomunicacoes Participacoes SP Telecomunicacoes Participacoes Ltd [Member] This member stands for SP Telecomunicacoes Participacoes Ltda. Telefonica LatinoAmerica Holding Telefonica LatinoAmerica Holding This member stands Telefonica LatinoAmerica Holding. Amortized cost Financial liabilities at amortised cost, category [member] Probability of competition increases Percentage Probability of competition increases Percentage Represents Probability of competition increases Percentage. Schedule of financial investments breakdown Disclosure of Financial Investments [Table Text Block] The tabular disclosure of financial investments. LOANS, FINANCING, DEBENTURES, LEASE, 5G LICENSES AND LIABILITIES FOR THE ACQUISITION OF A COMPANY ADDITIONAL INFORMATION ON CASH FLOWS Disclosure of detailed information about borrowings [line items] Recovered expenses and fines Expenses and fines recovered The amount of expenses and fines recovered. Write-offs (payments), financial charges Borrowings Repayments of Financial Charges, Write Offs The amount of financial charges payments write-offs of borrowings. Other changes on leases Other changes in leases Other changes in leases Discounts granted and return of goods Discount on sales and return of goods The amount of discount on sales and return of goods. Telefónica Global Solutions Telefnica Global Solutions [Member] This member stands for Telefnica Global Solutions. Financial assets Book value Financial assets Interim dividends and interest on equity Interim dividends and interest on equity This member stands for interim dividends and interest on equity. Percentage of risk deterioration for scenario one Percentage of risk deterioration for scenario one Percentage of risk deterioration for scenario one as per CVM ruling. Adjusted net income Profit loss after adjustments The total of income less expenses after allocation of legal reserve and adjustments, excluding the components of other comprehensive income. Financial institutions Financial institutions [Member] Financial institutions Shares issued Number of shares issued Real estate investments Real estate, amount contributed to fair value of plan assets Suppliers Suppliers This member stands for finance with suppliers. Temporary difference, unused tax losses and unused tax credits [domain] Temporary difference, unused tax losses and unused tax credits [domain] Accumulated depreciation and amortisation Accumulated depreciation and amortisation [member] Allocation of income: Allocation of income [Abstract] No definition available. Retained earnings Retained earnings [member] Changes in Borrowings, excluding cash and cash equivalents Changes in Borrowings, excluding cash and cash equivalents Changes in Borrowings, excluding cash and cash equivalents Income taxes payable Income taxes payable The amount of income taxes payable in respect of the taxable profit for a period. FINANCIAL INCOME (EXPENSES) Disclosure of finance income (cost) [text block] 2027 Later than one year and not later than two years [member] Leases recognised as of acquisition date Current Leases recognised as of acquisition date Current Leases recognised as of acquisition date State VAT (ICMS) Value added tax receivables Value added tax receivables Equity transactions Decrease from premium on acquisition of subsidiary, equity The decrease in equity resulting from the premium on acquisition of subsidiaries. OPERATIONS Disclosure of nature of business [Text Block] The entire disclosure of nature of business operations. Payment according to contractual clauses IPCA/SELIC Payment according to contractual clauses IPCA/SELIC [Member] Payment according to contractual clauses IPCA/SELIC Depreciation and amortization Depreciation and amortisation expense DEFERRED INCOME Disclosure Of Maturity Analysis Of Deferred Income From Contractual Liabilities [Line Items] Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. Benefits paid Benefits paid Decrease (increase) in net defined benefit liability (asset) resulting from payments from plan Threshold percentage for disposal of assets triggering early maturity Threshold percentage for disposal of assets triggering early maturity Threshold percentage for disposal of assets triggering early maturity Categories of financial assets [domain] Categories of financial assets [domain] Schedule of allocation of interim dividends and interest on equity Disclosure of dividends [text block] Derivative financial instruments Current Current derivative financial assets Tax litigation amount for the collection of IRPJ and CSLL related to amortization of goodwill Tax Litigation Amount for Collection of IRPJ and CSLL Related to Amortization of Goodwill The amount referring to a new assessment notice against the Company for the collection of IRPJ and CSLL related to the amortization of goodwill. Maximum amount for repurchase of common shares Maximum Value for Repurchased of Common Share The maximum amount for repurchase of common shares under share repurchase program. Merger of companies, Non-controlling shareholders Merger of companies, Non-controlling shareholders Merger of companies, Non-controlling shareholders Effective rate Combined Income Tax And Social Contribution Effective Tax Rate The combined income tax and social contribution tax expense (income) divided by the accounting profit. Cancellation of common shares Cancellation of common shares Cancellation of common shares Write-offs for payments of provision for legal demands, contingent liabilities, fines for canceling lease contracts and amounts to be refunded to customers Adjustments for Increase (Decrease) in Provisions for Tax, Civil, Labor and Regulatory Contingencies Adjustments for increase (decrease) in provisions for tax, civil, labor and regulatory contingencies to reconcile profit (loss) to net cash flow from (used in) operating activities. Asset limitation Balance at the beginning of the year Balance at the end of the year Balance at the beginning of the year Balance at the end of the year Defined benefit liability Net defined benefit liability (asset) Labor Judicial labor deposits Judicial deposits and garnishments as guarantees for labor proceedings. INCOME AND SOCIAL CONTRIBUTION TAXES Description of accounting policy for income taxes and taxes other than income tax [text block] The description of the entity's accounting policy for income tax and taxes other than income taxes. Cancellation of treasury shares Cancellation of treasury shares Summary of allocation of plan assets Disclosure of allocation of plan assets [table text block] The disclosure of allocation of plan assets. Disclosure of terms and conditions of share-based payment arrangement [abstract] Disclosure of terms and conditions of share-based payment arrangement [abstract] Net liabilities (assets) Surplus (deficit) in plan Personnel, social charges and benefits Non-current Non-current provisions for employee benefits Capital reserve Capital reserve [member] Contact Personnel Name Contact Personnel Name 5G Licenses 5G Licenses 5g Licenses Member. CDPQ CDPQ [Member] CDPQ Right of Withdrawal - approval of the acquisition of Garliava Right Of Withdrawal - Approval Of The Acquisition Of Garliava Amount of right of withdrawal - approval of the acquisition of Garliava Financial investments Current Current investments Goodwill (Spanish and Navytree, Vivo Part., GVT Part. and Garliava) Goodwill (Spanish e Navytree, Vivo Part. and GVTPart.) This member stands for effects of goodwill generated in the acquisition of Spanish e Navytree, Vivo Part and GVTPart. Ifrs Type Of Arrangement [Axis] Ifrs Type Of Arrangement [Axis] Information by collaborative arrangement and arrangement other than collaborative applicable to revenue-generating activity or operations. Disclosure of share-based payment arrangements Disclosure of share-based payment arrangements [Table Text Block] Disclosure of share-based payment arrangements Derivatives Derivatives [member] Net debt-to-equity ratio Net debt to equity ratio The ratio of net debt to equity for the entity. Remaing balance of Amnesty and Refinancing Programs for ICMS Remaing balance of Amnesty and Refinancing Programs for ICMS Remaing balance of Amnesty and Refinancing Programs for ICMS Ifrs Arrangements And Nonarrangement Transactions Ifrs Arrangements And Nonarrangement Transactions [Member] Collaborative arrangement and arrangement other than collaborative applicable to revenue-generating activity or operations. Provision for dismantling Provision for decommissioning, restoration and rehabilitation costs [member] Schedule of consolidated derivatives financial instruments that are registered with B3 and classified as swaps and that do not require margin deposits Disclosure of derivatives financial instruments classified as swaps, that do not require margin deposits [table text block] The disclosure of derivatives financial instruments shown below are registered with Brazils OTC Clearing House (???CETIP) and classified as swaps, usually, that do not require margin deposits. Reserve of exchange differences on translation Reserve of exchange differences on translation [member] Municipal Other provision for possible losses of municipal tax Amount of other provisions for possible losses under municipal tax laws. Based on rate decreased Based on rate decreased [Member] Based on rate decreased Share-based payment plans Share-based payment plans [Member] Share-based payment plans Total installments to the Company Total Installments To The Company Represents the Total amount of installments that fell to the company. Classes of share capital [axis] Classes of share capital [axis] Vivo Money I Credit Rights Investment Fund Vivo Money I Credit Rights Investment Fund [Member] Vivo Money I Credit Rights Investment Fund TOTAL EQUITY Equity at beginning of period Equity at end of period Equity Net equity Equity TAXES, CHARGES AND CONTRIBUTIONS RECOVERABLE Taxes, Charges and Contributions Recoverable [Text Block] The entire disclosure of Taxes, charges and contributions recoverable. CONTRACTUAL COMMITMENTS AND GUARANTEES Disclosure of commitments [text block] Gross profit Gross profit Provisioned amount for ICMS disputes Provisioned amount for ICMS disputes Provisioned amount for ICMS disputes Interim interest on equity (net of IRRF) Dividends and interest on equity payable as distributions to owners of parent, relating to current year The amount of dividends and interest on equity payable as distributions to owners of the parent relating to the current year. Current financial liabilities Fair value Current financial liabilities, at fair value The fair value of current financial liabilities. Corporate information and statement of IFRS compliance [abstract] Garliava Garliava RJ Infraestrutura e Redes de Telecomunicacoes S.A. [Member] This member stands for Garliava RJ Infraestrutura e Redes de Telecomunicacoes S.A. Purchased call options Purchased call options [member] Contingent liabilities (PPA) Contingent consideration [member] Based on rate increased Based on rate increased [Member] Based on rate increased Level 2 of fair value hierarchy Level 2 of fair value hierarchy [member] Disclosure of non-adjusting events after reporting period [abstract] Disclosure of non-adjusting events after reporting period [abstract] Schedule of net operating revenue Schedule of net operating revenue [table text block] Tabular disclosure of net operating revenue. Weighted average exercise price of share options outstanding in share-based payment arrangement Weighted average exercise price of share options outstanding in share-based payment arrangement Controlling shareholders Profit (loss), attributable to owners of parent Weighted annual interest rate on lease contracts Finance Lease, Weighted Annual Interest Rate The percentage of weighted annual interest rate on finance leases. Write-offs Decrease through impairment, contract assets PREPAID EXPENSES Disclosure of prepaid expenses [text block] The entire disclosure of prepaid expenses. Non Current Debentures recognised as of acquisition date Non Current Debentures recognised as of acquisition date Non Current Debentures recognised as of acquisition date Credit of Interest on Equity Intermediaries Credit of Interest on Equity Intermediaries [Member] This member stands for credit of interest on equity intermediaries. Disclosure of changes in the fair value of plan assets Disclosure of changes in the fair value of plan assets [Table Text Block] Disclosure of changes in the fair value of plan assets OTHER LIABILITIES OTHER LIABILITIES NA Insurance of guarantee Insurance guarantee - Legal proceedings (Note 20) This member stands for Insurance guarantee - Legal proceedings. Deferred tax assets Deferred tax assets Inventories Current inventories Current inventories Non-controlling interest Non-controlling interests [member] Non-controlling shareholders Comprehensive income, attributable to non-controlling interests Number of debentures issued Number of debentures issued The number of debentures issued. Document Accounting Standard Document Accounting Standard PBS Assisted Plan (PBS-A) PBS Assisted Plan (PBS-A) This member stands for the PBS Assisted Plan (PBS-A), a defined benefit private pension plan managed by Fundacao Sistel (Sistel) and sponsored by the reporting entity jointly with the other telecommunications companies originating in the privatization of the Telebr??s system. FINANCIAL INCOME (EXPENSES) [Line Items] FINANCIAL INCOME (EXPENSES) [Line Items] FINANCIAL INCOME (EXPENSES) Depreciation rate, property, plant and equipment Depreciation rate, property, plant and equipment Other current inventories Other current inventories Disclosure of joint ventures [table] Disclosure of joint ventures [table] Disclosure of detailed information about business combination Disclosure of detailed information about business combination [text block] Changes in assets and liabilities Increase (decrease) in working capital [abstract] No definition available. Fixed income investments and Loans to participants Debt instruments, amount contributed to fair value of plan assets FUST Other Provision For Probable Losses Of Other Tax Proceedings Amount of other provisions for probable losses under other tax proceedings (FUST, FISTEL and EBC) Actuarial losses (gains) adjusted by financial assumptions Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions DEFERRED INCOME Disclosure of deferred income [text block] Derivative financial instruments break down of swaps Disclosure of detailed information about financial instruments [line items] Adjustments for the reversal of provisions for customer refunds Adjustments for the reversal of provisions for customer refunds Adjustments for the reversal of provisions for customer refunds Deferred tax assets of subsidiaries Deferred tax assets of subsidiaries Deferred tax assets of subsidiaries Number of executives appointed under articles Bylaws Number of Executives Appointed Under Company's Bylaws The number of executives appointed under Company's Bylaws. Fibre Brasil Fibre Brasil [Member] Fibre Brasil Capital contribution – cash and cash equivalents (Vivo Ventures) Capital contributionCashAndCashEquivalents Capital contributionCashAndCashEquivalents Statutory tax rate Income Tax And Social Contribution Tax Combined Tax Rate Represents the combined percentage including the income tax and social contribution tax rates. Accumulated effects from fair value Amount receivable or payable Derivative financial assets BASIS OF PREPARATION AND PRESENTATION OF FINANCIAL STATEMENTS BASIS OF PREPARATION AND PRESENTATION OF FINANCIAL STATEMENTS No definition available. Net income for the year Profit (loss), attributable to ordinary equity holders of parent entity, used in calculating basic earnings per share Non Current Leases recognised as of acquisition date Non Current Leases recognised as of acquisition date Non Current Leases recognised as of acquisition date Terra Networks Mexico Terra Networks Mexico [Member] Terra Networks Mexico Provisioned amount for ICMS disputes after refinancing program Provisioned amount for ICMS disputes after refinancing program Provisioned amount for ICMS disputes after refinancing program Guarantee obligations Ifrs Guarantee Obligations [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Contribution tax on gross revenue for Social Integration Program (PIS) and for Social Security Financing (COFINS) Contribution tax on gross revenue for Social Integration Program (PIS) and for Social Security Financing (COFINS) This member stands for the contribution tax. Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions Percentage of Loan (CDI) with Caixa Economica Federal Percentage of Loan (CDI) with Caixa Economica Federal Percentage of Loan (CDI) with Caixa Economica Federal Additional proposed dividends Allocation of income to additional dividend proposed The amount of allocation of income on additional dividends proposed. IFRS Statement [Table] IFRS Statement [Table] Schedule reflecting a Statement of Income, Statement of Cash Flows, Statement of Financial Position, and Other Comprehensive Income, or other statement as needed. Business combination - Garliava Increase (Decrease) Through Business Combinations, Allowance Account For Credit Losses Of Financial Assets The increase (decrease) in allowance account for credit losses of financial assets resulting from business combinations. Intangible assets other than goodwill Intangible assets other than goodwill Income tax and social contribution and collection Deferred income tax and social contribution Liabilities recognised as of acquisition date Deferred income tax and social contribution Liabilities recognised as of acquisition date Debt risk of euribor increase Debt risk of euribor increase [Member] Debt risk of euribor increase Other Deferred income, other The amount of other deferred income. Cash and cash equivalents Cash and cash equivalents at beginning of the year Cash and cash equivalents at end of the year Total Cash and cash equivalents Cybersecurity Risk Management, Strategy, and Governance [Table] Document Information [Table] Document Information [Table] SUBSEQUENT EVENTS Disclosure of non-adjusting events after reporting period [line items] Telefonica Compras Electronicas Telefonica Compras Electronicas This member stands for Telefonica Compras Electronicas. Telefónica IoT & Big Data Tech Telefónica IoT & Big Data Tech [Member] Telefónica IoT & Big Data Tech Schedule of borrowings Disclosure of detailed information about borrowings [text block] Non-controlling shareholders Increase Decrease Through Changes in Equity Attributable to Non-controlling Interests The increase (decrease) in equity attributable to non-controlling interests. Business combinations [axis] Business combinations [axis] Property, plant and equipment, pledged as security Property, plant and equipment, pledged as security Allocation to net assets acquired Allocation to net assets acquired Allocation to net assets acquired Payment for part of the quotas already subscribed Payment for part of the quotas already subscribed Payment for part of the quotas already subscribed Loans and financing Loans and financing [Member] Loans and financing Refunding to shareholders Refunding to shareholders Refunding to shareholders Gain on derivative transactions Gains on change in fair value of derivatives Disclosure of attribution of expenses by nature to their function [table] Disclosure of attribution of expenses by nature to their function [table] Schedule of repayments by year of maturity Disclosure of maturity analysis for non-derivative financial liabilities [text block] Long term inflation rate Actuarial assumption of expected rates of inflation Financial institutions Financial Institution, Law No 4,131 [Member] This member stands for financial institution, Law No 4,131. Percentage of gross operating revenue's costumer contribution Percentage of gross operating revenue's costumer contribution Percentage of gross operating revenue's costumer contribution Unclaimed interest on equity Tax effects of unclaimed interest on equity The amount representing the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that unclaimed interest on equity. Relevant cases [Domain] Relevant cases [Domain] Relevant cases 2031 onwards Later than five years [member] Classes of financial assets [domain] Classes of financial assets [domain] Hedge US$ and Euro (liabilities position) derivative risk decrease in CDI Hedge US$ and Euro (liabilities position) derivative risk decrease in CDI [Member] This member stands for hedge US$ and Euro (short and long position) derivative risk decrease in CDI. Ifrs Schedule Of Guarantee Obligations [Table] Ifrs Schedule Of Guarantee Obligations [Table] Tabular disclosure about the type or nature of guarantees, for example performance, indemnification, payment and other guarantees, and related information such as term, origin and purpose, triggering event, maximum exposure, and carrying value. Represents the guarantor's disclosures which include the information about each guarantee, or each group of similar guarantees, even if the likelihood of the guarantor's need to make any payments under the guarantee is remote. This excludes disclosures for product warranties. Provisions for labor, tax and civil contingencies Provisions for labor, tax and civil contingencies The amount of expenses related to labor, tax and civil contingencies. 06/23/2025 06/23/2025 [Member] 06/23/2025 Total Trade and other payables Goodwill Goodwill recognised as of acquisition date Estimated impact on reduction capacity Estimated impact on reduction capacity Estimated impact on reduction capacity Telefônica IoT, Big Data e Tecnologia do Brasil S.A. (“IoTCo Brasil”) Telefônica IoT, Big Data e Tecnologia do Brasil S.A. (“IoTCo Brasil”) [Member] Telefônica IoT, Big Data e Tecnologia do Brasil S.A. (“IoTCo Brasil”) Auditor Name Auditor Name Other capital reserves Other capital reserves [Member] Other capital reserves Additions Increase (decrease) through cumulative catch-up adjustments to revenue, contract assets Schedule of changes in investments Disclosure of changes in investments Tabular disclosure of changes in investments. Perpetuity growth rate Perpetuity growth rate Perpetuity growth rate PIS and COFINS Social contribution tax recoverable for social integration program and social security financing The amount of PIS and COFINS. TRADE ACCOUNTS RECEIVABLE Disclosure of trade and other receivables [text block] Goodwill Goodwill [member] Equity Valuation adjustment Other equity interest [member] Net cash generated by operating activities Cash flows from (used in) operating activities SHARE-BASED PAYMENT PLANS Disclosure of terms and conditions of share-based payment arrangement [line items] INVESTMENTS Disclosure of interests in other entities [text block] Collective consumerist and non-consumerist nature Collective consumerist and non-consumerist nature [Member] Collective consumerist and non-consumerist nature Unrealized financial expenses Future Finance Charge On Finance Lease The amount representing the difference between the future minimum finance lease payments and their present value. Minimum lease payments are payments over the lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with: (a) for a lessee, any amounts guaranteed by the lessee or by a party related to the lessee; or (b) for a lessor, any residual value guaranteed to the lessor by: (i) the lessee; (ii) a party related to the lessee; or (iii) a third party unrelated to the lessor that is financially capable of discharging the obligations under the guarantee. Document Fiscal Year Focus Document Fiscal Year Focus Adjustment for: Adjustments to reconcile profit (loss) [abstract] Total Investments other than investments accounted for using equity method Number of shares in entity held by entity or by its subsidiaries or associates Number of shares in entity held by entity or by its subsidiaries or associates Estimated retirement age Actuarial assumption of retirement age Written put options Written put options [member] Federal Other provision for probable losses of federal tax Amount of other provisions for probable losses under federal tax laws. Types of interest rates [domain] Types of interest rates [domain] CDI x Foreign Currency CDI x Foreign Currency This member stands for long term interest rate (TJLP) Swap contract. Taxes and contingencies Taxes and contingencies [Member] Taxes and contingencies After-tax discount rate After-tax discount rate After-tax discount rate Foreign exchange gain Foreign exchange gain Key management personnel compensation Key management personnel compensation IOF, Pis, Cofins and other financial expenses Other finance cost Other assets Adjustments for decrease (increase) in other assets Loan agreement between CloudCo Brasil and TCCT Loan agreement between CloudCo Brasil and TCCT Loan agreement between CloudCo Brasil and TCCT Acquisitions through business combinations, other provisions Acquisitions through business combinations, other provisions Euribor x CDI Euribor x CDI [Member] Euribor x CDI Post-retirement health plans Post-retirement health plans This member stands for post-employment defined benefit post-retirement health plans. Excludes defined benefit pension plans and defined contribution plans. INTANGIBLE ASSETS Description of accounting policy for intangible assets and goodwill [text block] Liabilities with ANATEL Liabilities With ANATEL [Member] This member stands for Liabilities With ANATEL member Translation gains (losses) Gains (losses) on exchange differences on translation of foreign operations, net of tax Local Phone Number Local Phone Number Schedule of actuarial assumptions Disclosure of actuarial assumptions [table text block] The disclosure of actuarial assumptions. Adjustments for gains (losses) on the revaluation of equity interests in the acquisition of control and other investment gains Adjustments for gains (losses) on the revaluation of equity interests in the acquisition of control and other investment gains Adjustments for gains (losses) on the revaluation of equity interests in the acquisition of control and other investment gains Disclosure of detailed information about property, plant and equipment [abstract] Disclosure of detailed information about property, plant and equipment [abstract] Description of Accounting Policy for Loans, Financing, Debentures, Lease, 5G Licenses and Liabilities for the Acquisition of a Company Description of Accounting Policy for Loans, Financing, Debentures, Lease, 5G Licenses and Liabilities for the Acquisition of a Company [Policy Text Block] Description of Accounting Policy for Loans, Financing, Debentures, Lease, 5G Licenses and Liabilities for the Acquisition of a Company Intangible assets Identifiable intangible assets recognised as of acquisition date Total Income and Social Contribution Taxes Recoverable The amount of income and social contribution taxes recoverable. Capital contribution made Cash transferred Payment of reduction in share capital net of income tax per share Payment of reduction in share capital net of income tax per share Payment of reduction in share capital net of income tax per share Entity Voluntary Filers Entity Voluntary Filers Measured at fair value through OCI Financial liabilities at fair value through other comprehensive income category [member] This member stands for the financial liabilities at fair value through other comprehensive income category. Non-current Taxes, Charges and Contributions Recoverable, Non-current The amount of non-current value of taxes, charges and contributions recoverable. Ownership interest (as a percent) Proportion of ownership interest in subsidiary Provision for loss recognized upon acquisition Provision for loss recognized upon acquisition Provision for loss recognized upon acquisition Entity Registrant Name Entity Registrant Name Capital management Capital management This member stands for capital management risk. Basic earnings per common share (in R$) Basic earnings (loss) per share Write-offs, Provision for losses Write off on Provision for Losses, Contract Assets The amount of write-off on provision for losses on contract assets. Foreign exchange on loans and derivative financial instruments Adjustments for unrealised foreign exchange losses (gains) Income tax and social contribution payable Income tax and social contribution payable Income tax and social contribution payable CyberCo Brasil TELEFONICA CYBERSECURITY & CLOUD TECH, SL [Member] TELEFONICA CYBERSECURITY & CLOUD TECH, SL Tax Judicial tax deposits Judicial deposits and garnishments as guarantees for tax proceedings. Foreign currency Foreign currency This member stands for foreign currency. Accounts receivable - FIDC Accounts receivable - FIDC Accounts receivable - FIDC Proportion of average remuneration of short-term investments corresponded to CDI Proportion of Average Remuneration of Short-Term Investments Corresponded to CDI The proportion of average remuneration of short-term investments corresponded to the Interbank Deposit Certificate (CDI). Deferred taxes on tax losses, negative basis and temporary differences Deferred taxes on tax losses, negative basis and temporary differences Deferred taxes on tax losses, negative basis and temporary differences Contribution through the subscription of senior shares Contribution through the subscription of senior shares Contribution through the subscription of senior shares Continuing involvement in derecognised financial assets by type of instrument [domain] Continuing involvement in derecognised financial assets by type of instrument [domain] Percent of trade account receivables Percent of trade account receivables Percent of trade account receivables Non-controlling shareholders Non-controlling interests Other assets, non-current Other noncurrent receivables due from related parties The non-current portion of other receivables due from related parties excludes trade receivables. PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS Disclosure of employee benefits [text block] Tax incentive reserve Tax incentive reserve [Member] This member stands for component of equity representing the tax incentive reserve. Expenses with monetary variations of provisions for contingencies Expenses with Monetary Variations of Provisions for Contingencies Amount of expenses with monetary variations of provisions for contingencies. All Currencies [Domain] All Currencies [Domain] Disclosure of disaggregation of revenue from contracts with customers [table] Disclosure of disaggregation of revenue from contracts with customers [table] Revenues that should be included in the calculation Revenues that should be included in the calculation [Member] Revenues that should be included in the calculation Prepaid expenses Non-current Non-current prepayments Embedded derivative financial instruments held Embedded Derivative, Number of Instruments Held The number of embedded derivative instruments held by the entity. GUD Comercializadora de Energia S.A. ("GUD") GUD Comercializadora de Energia S.A. ("GUD") [Member] GUD Comercializadora de Energia S.A. ("GUD") Schedule of cash and cash equivalents Disclosure of cash and cash equivalents [table text block] The tabular disclosure of cash and cash equivalents. Disclosure of transactions between related parties [abstract] Disclosure of transactions between related parties [abstract] Probability of acceptance (as a percent) Tax Litigation, Probability Of Acceptance The percentage of probability of acceptance of a large part of deductions of expenses, mainly related to the amortization of goodwill, under a tax litigation. Hedging instruments [axis] Hedging instruments [axis] Types of legal proceedings [Axis] Types of legal proceedings [Axis] Types of legal proceedings Telefónica Latinoamérica Holding Telefonica Latinoamerica Holding Sl [Member] This member stands for Telefonica Latinoamerica Holding S.L. TRADE ACCOUNTS RECEIVABLE TRADE ACCOUNTS RECEIVABLE N/A Percentage of charge on interconnection services Percentage of charge on interconnection services Percentage of charge on interconnection services revenue arising from the extension of right of use of SMP related radio frequencies. IR and CS on interest SELIC update of undue debts Tax Effect Of Composition Of CSLL Tax Loss And Negative Base, SELIC Update Of Undue Debts The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to composition of CSLL tax loss and negative base (SELIC update of undue debts). Telefonica Cibersegurana e Tecnologia Do Brasil Telefonica Cyber Tech Brasil This member stands for Telef??nica Cyber Tech Brasil. Payment of additional dividend Dividends recognised as distributions to owners of parent, relating to prior years ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Classes of employee benefits expense [abstract] Classes of employee benefits expense [abstract] Number of monthly payments for distribution of reserves Defined Benefit Plans, Distribution Of Reserves, Number Of Monthly Payments The number of monthly payments for distribution of reserves under the defined benefit plan. Schedule of breakdown of changes in provisions for cases in which an unfavorable outcome is probable, in addition to contingent liabilities and provisions for dismantling Disclosure of other provisions [text block] Deferred income tax and social contribution through changes in the health plan for employees and retirees Deferred income tax and social contribution through changes in the health plan for employees and retirees Deferred income tax and social contribution through changes in the health plan for employees and retirees Payments to shareholders for reduction of share capital Payments to shareholders for reduction of share capital Payments to shareholders for reduction of share capital NDF US$ NDF US dollar rate [Member ] This member stands for NDF US$ rate. Disclosure of other matters [Line Items] Disclosure of other matters [Line Items] Disclosure of other matters [Line Items] Schedule of expected periods of realization of contractual liabilities Disclosure Of Maturity Analysis Of Deferred Income From Contractual Liabilities, Explanatory The disclosure of a maturity analysis for deferred income from contractual liabilities. Controlling shareholders Comprehensive income, attributable to owners of parent Company Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity attributable to owners of parent Regulatory Judicial Regulatory Deposits Judicial deposits and garnishments as guarantees for regulatory proceedings. TOTAL LIABILITIES Liabilities Liabilities Medical expense growth rate Actuarial assumption of medical cost trend rates 12/26/2024 12/26/2024 [Member] 12/26/2024 Statistical Disclosure for Banks [Abstract] Interconnection amounts Trade and other receivables interconnection amounts The amount receivable by interconnection amounts. Personal Prepaid Personal The amount recognised as a asset for expenditures made prior to the period when the economic benefit will be realised with respect to personal. Income and social contribution taxes payable Current Income and Social Contribution Taxes Payable, Current The amount of current value of income and social contribution taxes payable. Net defined benefit liability (asset) PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS Disclosure of net defined benefit liability (asset) [line items] Capital transactions - share consolidation and stock split processes Capital transactions - share consolidation and stock split processes Capital transactions - share consolidation and stock split processes Taxes, charges and contributions payable Current Current tax liabilities, current Disclosure of detailed information about hedges [table] Disclosure of detailed information about hedges [table] Discount rate applied to cash flow projections Discount rate applied to cash flow projections Vivo Money III Investment Fund in Credit Rights Vivo Money III Investment Fund in Credit Rights [Member] Vivo Money III Investment Fund in Credit Rights Allocation of plan assets Disclosure of fair value of plan assets [line items] Long-term inflation rate in post-retirement pension and health plans Long-term inflation rate in post-retirement pension and health plans Long-term inflation rate in post-retirement pension and health plans Non-compete agreement recognized separately from the business combination at fair value Non-compete agreement recognized separately from the business combination at fair value Non-compete agreement recognized separately from the business combination at fair value Disclosure of nature and extent of risks arising from financial instruments [table] Disclosure of nature and extent of risks arising from financial instruments [table] Deferred income Non-current Non-current deferred income including non-current contract liabilities Lease liabilities Lease liabilities [member] PADO PADO [Member] PADO Income and social contribution taxes recoverable Income and Social Contribution Taxes Recoverable, Current The amount of current value of income and social contribution taxes recoverable. IMPAIRMENT OF NON-FINANCIAL ASSETS Disclosure of impairment of assets [text block] Senior shares in the Vivo Money FIDCs and the loan agreement of the subsidiary CloudCo Brasil Senior shares in the Vivo Money FIDCs and the loan agreement of the subsidiary CloudCo Brasil Senior shares in the Vivo Money FIDCs and the loan agreement of the subsidiary CloudCo Brasil SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES No Definition. Non-adjusting events after reporting period [axis] Non-adjusting events after reporting period [axis] Hedging instruments [domain] Hedging instruments [domain] Disclosure of nature of operations [table] Disclosure of nature of operations [table] Schedule disclosing information related to nature of business operations. Foreign exchange variation on borrowings` Foreign exchange variation on borrowings` The amount of foreign currency variation on borrowings. Contingent consideration conditional upon achieving performance targets Contingent consideration conditional upon achieving performance targets Contingent consideration conditional upon achieving performance targets 5G Licences 5G Licences [Member] 5G Licences Civil Legal proceedings provision [member] 2029 Later than three years and not later than four years [member] Pension plans and other post-employment benefits Pension plans and other post-employment benefits This member stands for pension plans and other post-employment benefits. Reduction of Capital of the Company Reduction of Capital of the Company [Member] Reduction of Capital of the Company Special goodwill reserve Special goodwill reserve This member stands for a component of equity representing the special goodwill reserve. Hedge (assets position) derivatives risk of decrease risk in IPCA Hedge (assets position) derivatives risk of decrease risk in IPCA This member stands for hedge (long position) derivatives risk of decrease risk in IPCA. Share buyback Share buyback Share buyback Provision for tax litigation, filed by the Federal Revenue of Brazil ("RFB") Provision For Tax Litigation The amount of provision for tax litigation. Present value of the financing with TTech Present value of the financing with TTech Present value of the financing with TTech Joint ventures [axis] Joint ventures [axis] Schedule of movement of incremental costs in obtaining contracts with customers Disclosure of assets recognised from costs to obtain or fulfil contracts with customers [text block] Borrowings by name [domain] Borrowings by name [domain] State of Rio Grande do Sul Amnesty Program State of Rio Grande do Sul Amnesty Program [Member] State of Rio Grande do Sul Amnesty Program Trade accounts receivable Trade receivables [member] FINANCIAL INSTRUMENTS AND RISK AND CAPITAL MANAGEMENT Disclosure of risk management strategy related to hedge accounting [line items] Deferred tax liabilities Deferred tax liabilities Income and social contribution taxes paid Income taxes paid (refund), classified as operating activities Derivatives financial instruments Disclosure of detailed information about hedges [line items] Provisions and contingencies Other current provisions Treasury share Treasury shares [member] Schedule of reconciliation of parent company and consolidated net income Reconciliation Of Parent Company And Consolidated Net Income [Table Text Block] Tabular disclousre of reconciliation of parent company and consolidated net income. IOE and Dividends, Net Value Interest on equity and dividends, net of tax The amount of interest on equity and dividend, net of withholding income tax. Fair value of net assets acquired Identifiable assets acquired (liabilities assumed) Debt depreciation risk for receivables in US dollars Debt depreciation risk for receivables in US dollars This member stands for debt depreciation risk for receivables in US dollars. Disclosure of subsidiaries [line items] Disclosure of subsidiaries [line items] Schedule of deferred income Schedule of deferred revenue [table text block] Tabular disclosure of deferred revenue. Amnesty program [Domain] Amnesty program [Domain] Amnesty program Payment in cash Payment in cash [Member] Payment in cash Continuing involvement in derecognised financial assets by type of instrument [axis] Continuing involvement in derecognised financial assets by type of instrument [axis] 2025 2025 [Member] 2025 Provisions for tax, civil, labor and regulatory contingencies Adjustments for increase in other provisions arising from passage of time Trade accounts receivable Non-current Trade and other non-current receivables Attribution of expenses by nature to their function [domain] Attribution of expenses by nature to their function [domain] Legal reserve Allocation of income to legal reserve The amount of allocation of income to legal reserve. Payments of loans, financing, debentures, leases, 5G licenses and contingent liabilities Repayments of borrowings, classified as financing activities Current financial assets Fair value Current financial assets, at fair value The fair value of current financial assets. Depreciation on lease Depreciation on lease The amount of depreciation related to lease. TRADE ACCOUNTS PAYABLE Disclosure of trade and other payables [text block] Investments linked to funds and market indexes Investments linked to funds and market indexes This member stands for variable income investments linked to funds and market indexes. Derivative financial instruments Non Current Non-current derivative financial assets Growth rate Growth rate used to extrapolate cash flow projections FiBrasil Infraestrutura e Fibra Otica S.A. ("FiBrasil") FiBrasil Infraestrutura e Fibra Otica S.A. ("FiBrasil") This member stands for FiBrasil Infraestrutura e Fibra otica S.A. ("FiBrasil"). Fair value of non-compete Fair value of non-compete Fair value of non-compete Estimated impairment losses Accumulated impairment [member] Schedule of breakdown of and changes to property, plant and equipment Disclosure of detailed information about property, plant and equipment [text block] Licenses 5G Licenses Licences [member] Annual interest rate (as a percent) Borrowings, interest rate Net cash used in investing activities Cash flows from (used in) investing activities Consolidated and separate financial statements [axis] Consolidated and separate financial statements [axis] Amnesty and Refinancing Programs for ICMS Amnesty and Refinancing Programs for ICMS Amnesty and Refinancing Programs for ICMS Consolidation of common shares Consolidation of common shares Consolidation of common shares Pension plan and other post-employment benefit liabilities Pension plan and other post-employment benefit liabilities Pension plan and other post-employment benefit liabilities Schedule of taxes, charges and contributions recoverable Taxes, Charges and Contributions Recoverable [Table Text Block] The disclosure of Taxes, charges and contributions recoverable. Personnel Employee benefits expense Amortisation, intangible assets other than goodwill Amortisation, intangible assets other than goodwill Total adjustments Cash flows from operating activities before interest and taxes The amount of cash inflow or outflow from operating activities before interest and income and social contribution taxes paid. Current assets Current assets 2026 2026 [Member] 2026 Derivative financial assets held for hedging Derivative financial assets held for hedging Acquisition related loan completion time for use purposes Acquisition related loan completion time for use purposes Acquisition related loan completion time for use purposes Corporate Income Tax (IRPJ) and Social Contribution Tax (CSLL) Corporate Income Tax (IRPJ) and Social Contribution Tax (CSLL) This member stands for corporate income tax (IRPJ) and social contribution tax (CSLL). Estimated impairment losses on accounts receivable Estimated impairment losses on accounts receivable The amount of estimated impairment losses on accounts receivable. Schedule of calculation of dividends and interest on equity Disclosure of calculation of dividends and interest on equity [Table Text Block] The tabular disclosure of calculation of dividends and interest on equity. Consolidated Consolidated [member] Vivo Pay Holding Financeira Ltda ("Vivo Pay") Vivo Pay Holding Financeira Ltda ("Vivo Pay") [Member] Vivo Pay Holding Financeira Ltda ("Vivo Pay") Types of risks [axis] Types of risks [axis] Disclosure of other matters [Abstract] Disclosure of other matters [Abstract] Disclosure of other matters Trade and other payables [abstract] Trade and other payables [abstract] Sponsor contributions Payments from plan and contributions to plan, net defined benefit liability (asset) The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan and contributions to a defined benefit plan. Visao Telefonica Visao Telefonica This member stands for the Visao Telefonica plan. Interest payable (financial institutions, trade accounts payable, taxes and other) Interest expenses on payable The amount of interest expenses on payables. Effects on equity of fair value adjustments Adjustments for fair value losses (gains) Derivative financial liabilities held for hedging Derivative financial liabilities held for hedging Amortized cost Financial assets at amortised cost, category [member] Schedule of information on the jointly controlled subsidiaries of the Company Disclosure of joint ventures [text block] Deferred taxes Net deferred tax assets Disclosure of labor provisions and contingencies Disclosure of labor provisions and contingencies [Table Text Block] Disclosure of labor provisions and contingencies Amendment Flag Amendment Flag Description Of Accounting Policy For Financial Instruments And Risk And Capital Management [Text Block] Description Of Accounting Policy For Financial Instruments And Risk And Capital Management [Text Block] Description Of Accounting Policy For Financial Instruments And Risk And Capital Management Schedule of consolidated information presented the amounts of interest held by controlling and non-controlling shareholders Disclosure of non-controlling interests [text block] Cash Flows from Operating Activities, Additions Cash Flows from Operating Activities, Additions Cash Flows from Operating Activities, Additions Payments made to identified shareholders Payments made to identified shareholders Payments made to identified shareholders PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS Description of accounting policy for employee benefits [text block] Temporary difference, unused tax losses and unused tax credits [axis] Temporary difference, unused tax losses and unused tax credits [axis] Other operating income and net Other operating income and net Other operating income and net National Treasury Notes (LTN) National Treasury Notes (LTN) This member stands for National Treasury Notes (LTN) fixed income investments. Legal reserve Legal reserve This member stands for component of equity representing the legal reserve. Book value of exchange risk Book Value Of Exchange Risk Amount of book value of exchange risk. Recoverable value of WACC Recoverable value of WACC Recoverable value of WACC Alianca Atlantica Holding B.V. ("Alianca") Alianca Atlantica Holding B.V. ("Alianca") This member stands for Alianca Atlantica Holding B.V. Type of taxes [Table] Type of taxes [Table] Represents the details pertaining to taxes. Noncurrent financial liabilities Book value Non-current financial liabilities Disclosure Of Maturity Analysis For Contractual Commitment [Table] Disclosure Of Maturity Analysis For Contractual Commitment [Table] Schedule disclosing information related to the maturity analysis for contractual commitments. Sale of real estate and other receivables Sale of real estate and other receivables (Note 11) This member stands for Sale of real estate and other receivables. Subscription bonus Subscription Bonus Amount of subscription bonus. 2024 2024 [Member] 2024 Schedule of breakdown of dividend and interest on equity Disclosure of dividends and interest on equity [table text block] The disclosure of dividends and interest on equity. Financial income (expenses), net FinanceIncomeExpensesNet FinanceIncomeExpensesNet Current liabilities Current net defined benefit liability Taxes, charges and contributions recoverable Current tax assets, non-current TFSP 2023-2025 cycle [Member] TFSP 2023-2025 cycle [Member] TFSP 2023-2025 cycle Type of reserves [Axis] Type of reserves [Axis] Type of reserves Currency [Axis] Currency [Axis] Depreciation And Write Offs, Net, I F R S 16, Property, Plant And Equipment Depreciation And Write Offs, Net, I F R S 16, Property, Plant And Equipment The amount of depreciation and write offs, net related to property, plant and equipment under IFRS 16. Social contribution taxes payable Social Contribution Taxes Payable The amount of social contribution taxes payable. SHARE-BASED PAYMENT PLANS Disclosure of terms and conditions of share-based payment arrangement [table] Defined benefit liability discounted to present value Defined benefit liability discounted to present value Defined benefit liability discounted to present value Weighted average hedged rate Weighted average hedged rate Weighted average hedged rate Income and social contribution taxes on temporary differences Income and social contribution taxes on temporary differences This member stands for income and social contribution taxes on temporary differences. Convertible Note Agreement Convertible Note Agreement [Member] Convertible Note Agreement Schedule of calculation of earnings per share Earnings per share [text block] Telefónica Infra S.L. Unipersonal Telefónica Infra S.L. Unipersonal [Member] Telefónica Infra S.L. Unipersonal PROVISION AND CONTINGENCIES PROVISION AND CONTINGENCIES No definition. Disclosure of detailed information about property, plant and equipment [table] Disclosure of detailed information about property, plant and equipment [table] Surplus from post-employment benefit plans Actuarial liabilities per balance sheet Net defined benefit liability Net defined benefit liability Net defined benefit liability Total term of the debentures Total term of the debentures Total term of the debentures FINANCIAL INCOME (EXPENSES) Description of accounting policy for finance income and costs [text block] Derivate financial instruments Derivate financial instruments [Member] Derivate financial instruments Allocation of plan assets [Member] Allocation of plan assets [Member] Allocation of plan assets