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Business combinations - Acquisition of mobile assets of Oi Group (Details) - Oi Group € in Millions, R$ in Millions | Oct. 23, 2023 BRL (R$) | Dec. 31, 2022 EUR (€) | Apr. 20, 2022 BRL (R$) | Apr. 20, 2022 EUR (€)
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Disclosure of detailed information about business combination [line items] |  |  |  |
Consideration | R$ 5,129 |  | R$ 5,492 | € 1,093
Intangible assets |  |  |  | 539
Property, plant and equipment |  |  |  | 29
Rights of use |  |  |  | 105
Deferred tax assets |  |  |  | 44
Trade receivables |  |  |  | 74
Other assets |  |  |  | 30
Cash and cash equivalents |  |  |  | 13
Lease liabilities |  |  |  | (117)
Trade payables |  |  |  | (24)
Provisions |  |  |  | (221)
Other liabilities |  |  |  | (55)
Net assets |  |  |  | 417
Goodwill |  | € 676 |  | 676
Licenses |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |
Intangible assets |  | € 520 |  | 520
Customer relationships |  |  |  |
Disclosure of detailed information about business combination [line items] |  |  |  |
Intangible assets |  |  |  | € 19

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- Definition The amount recognised as of the acquisition date for deferred tax assets acquired in a business combination. [Refer: Deferred tax assets; Total for all business combinations [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 3 -IssueDate 2024-01-01 -Paragraph B64 -Subparagraph i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64_i&doctype=Appendix&subtype=B -URIDate 2024-03-27 + Details
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