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Associates and Joint Ventures - Breakdown of Key Financial Highlights (Details) - EUR (€) € in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Other non-current assets | € 2,064 | € 2,067 |  |
Non-current assets | 78,133 | 83,568 |  |
Cash and cash equivalents | 8,062 | 7,151 | € 7,245 | € 8,580
Other current assets | 2,881 | 2,702 |  |
Current assets | 22,369 | 20,756 |  |
Total assets | 100,502 | 104,324 |  |
Non-current financial liabilities | (33,192) | (33,360) |  |
Other non current liabilities | (1,843) | (1,692) |  |
Non current liabilities | (52,019) | (53,829) |  |
Current financial liabilities | (5,590) | (3,701) |  |
Other current liabilities | (1,966) | (1,819) |  |
Current liabilities | (25,734) | (23,399) |  |
Purchase price allocation |  |  |  |
Group’s share in equity | 22,749 | 27,096 | 31,708 | € 28,684
Goodwill | 16,461 | 18,708 |  |
Carrying amount in the Telefónica Group | 232 | 325 |  |
HoldCo Infraco SpA. (Onnet Fibra Chile) |  |  |  |
Purchase price allocation |  |  |  |
Assets | 159 | 178 |  |
Liabilities | (43) | (48) |  |
Fair value of net assets | € 116 | € 130 |  |
Proportion of holding (in percentage) | 40.00% | 40.00% |  |
Group’s share in equity | € 89 | € 120 |  |
Other adjustments | 30 |  | 30 |
Carrying amount in the Telefónica Group | 119 | 150 |  |
Movistar Prosegur Alarmas |  |  |  |
Purchase price allocation |  |  |  |
Assets | 42 | 76 |  |
Liabilities | (11) | (20) |  |
Fair value of net assets | € 31 | € 56 |  |
Proportion of holding (in percentage) | 50.00% | 50.00% |  |
Group’s share in equity | € 15 | € 32 |  |
Goodwill | 198 | 198 |  |
Carrying amount in the Telefónica Group | € 213 | € 230 |  |
Unsere Grüne Glasfaser (UGG) |  |  |  |
Purchase price allocation |  |  |  |
Proportion of holding (in percentage) | 50.00% | 50.00% |  |
Group’s share in equity | € 55 | € 49 |  |
Other adjustments | 49 | 49 |  |
Carrying amount in the Telefónica Group | € 104 | € 97 |  |
Opal Jvco Limited (nexfibre) |  |  |  |
Purchase price allocation |  |  |  |
Proportion of holding (in percentage) | 25.00% | 25.00% |  |
Group’s share in equity | € 90 | € 51 |  |
Other adjustments | 4 |  | € 4 |
Carrying amount in the Telefónica Group | 94 | 55 |  |
Movistar Prosegur Alarmas |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Fixed assets | 204 | 172 |  |
Other non-current assets | 141 | 160 |  |
Non-current assets | 345 | 332 |  |
Cash and cash equivalents | 1 | 1 |  |
Other current assets | 102 | 58 |  |
Current assets | 103 | 59 |  |
Total assets | 448 | 391 |  |
Non-current financial liabilities | (205) | (175) |  |
Other non current liabilities | (78) | (63) |  |
Non current liabilities | (283) | (238) |  |
Current financial liabilities | (100) | (102) |  |
Other current liabilities | (65) | (43) |  |
Current liabilities | (165) | (145) |  |
Total allocated liabilities | (448) | (383) |  |
Net assets | 0 | 8 |  |
Unsere Grüne Glasfaser (UGG) |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Fixed assets | 1,344 | 438 |  |
Other non-current assets | 194 | 211 |  |
Non-current assets | 1,538 | 649 |  |
Cash and cash equivalents | 282 | 49 |  |
Other current assets | 63 | 50 |  |
Current assets | 345 | 99 |  |
Total assets | 1,883 | 748 |  |
Non-current financial liabilities | (1,493) | (522) |  |
Other non current liabilities | (43) | (36) |  |
Non current liabilities | (1,536) | (558) |  |
Current financial liabilities | (4) | (5) |  |
Other current liabilities | (232) | (88) |  |
Current liabilities | (236) | (93) |  |
Total allocated liabilities | (1,772) | (651) |  |
Net assets | 111 | 97 |  |
Opal Jvco Limited (nexfibre) |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Fixed assets | 1,833 | 840 |  |
Other non-current assets | 185 | 98 |  |
Non-current assets | 2,018 | 938 |  |
Cash and cash equivalents | 37 | 23 |  |
Other current assets | 62 | 54 |  |
Current assets | 99 | 77 |  |
Total assets | 2,117 | 1,015 |  |
Non-current financial liabilities | (1,453) | (593) |  |
Other non current liabilities | (3) | 0 |  |
Non current liabilities | (1,456) | (593) |  |
Current financial liabilities | (100) | (61) |  |
Other current liabilities | (199) | (157) |  |
Current liabilities | (299) | (218) |  |
Total allocated liabilities | (1,755) | (811) |  |
Net assets | 362 | 204 |  |
HoldCo Infraco SpA. (Onnet Fibra Chile) |  |  |  |
Disclosure Of Joint Ventures And Associates [Line Items] |  |  |  |
Non-current assets | 1,343 | 857 |  |
Cash and cash equivalents | 11 | 27 |  |
Other current assets | 84 | 182 |  |
Current assets | 95 | 209 |  |
Total assets | 1,438 | 1,066 |  |
Non-current financial liabilities | (892) | (521) |  |
Other non current liabilities | (304) | (293) |  |
Non current liabilities | (1,196) | (814) |  |
Current financial liabilities | (34) | (3) |  |
Other current liabilities | (102) | (78) |  |
Current liabilities | (136) | (81) |  |
Total allocated liabilities | (1,332) | (895) |  |
Net assets | € 106 | € 171 |  |

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