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Payables and Other Current Liabilities - Current Debt Spectrum Acquisition (Details) - EUR (€) € in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Trade And Other Payables [Line Items] |  |
Debt for spectrum acquisition | € 227 | € 218
Telefónica Germany |  |
Trade And Other Payables [Line Items] |  |
Debt for spectrum acquisition | 107 | 107
Telefónica Colombia |  |
Trade And Other Payables [Line Items] |  |
Debt for spectrum acquisition | 60 | 10
Telefónica Brazil |  |
Trade And Other Payables [Line Items] |  |
Debt for spectrum acquisition | 10 | 66
Telefónica Spain |  |
Trade And Other Payables [Line Items] |  |
Debt for spectrum acquisition | 32 | 7
Telefónica Ecuador |  |
Trade And Other Payables [Line Items] |  |
Debt for spectrum acquisition | 15 | 16
Telefónica Uruguay |  |
Trade And Other Payables [Line Items] |  |
Debt for spectrum acquisition | € 3 | € 12

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