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Other comprehensive income - Schedule of exchange differences included in other comprehensive income that may be reclassified to profit or loss, by country (Details) - EUR (€) € in Millions | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
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Items that may be reclassified to profit or loss |  |  |
Reserve of hedge of net investments in foreign operations and exchange differences on translation | € (32,818) | € (30,377) | € (28,194)
Brazilian real |  |  |
Items that may be reclassified to profit or loss |  |  |
Reserve of hedge of net investments in foreign operations and exchange differences on translation | (19,412) | (19,293) | (16,340)
Mexican peso |  |  |
Items that may be reclassified to profit or loss |  |  |
Reserve of hedge of net investments in foreign operations and exchange differences on translation | (4,137) | (3,995) | (2,942)
Pound sterling |  |  |
Items that may be reclassified to profit or loss |  |  |
Reserve of hedge of net investments in foreign operations and exchange differences on translation | (4,125) | (3,444) | (3,964)
Chilean peso |  |  |
Items that may be reclassified to profit or loss |  |  |
Reserve of hedge of net investments in foreign operations and exchange differences on translation | (2,926) | (2,857) | (2,531)
Argentine peso |  |  |
Items that may be reclassified to profit or loss |  |  |
Reserve of hedge of net investments in foreign operations and exchange differences on translation | (2,217) | (2,090) | (2,655)
Polish zloty |  |  |
Items that may be reclassified to profit or loss |  |  |
Reserve of hedge of net investments in foreign operations and exchange differences on translation | (43) | (709) | (786)
US dollar |  |  |
Items that may be reclassified to profit or loss |  |  |
Reserve of hedge of net investments in foreign operations and exchange differences on translation | 1,047 | 2,923 | 1,819
Other currencies |  |  |
Items that may be reclassified to profit or loss |  |  |
Reserve of hedge of net investments in foreign operations and exchange differences on translation | € (1,005) | € (912) | € (795)

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- Definition A component of equity representing hedges of net investments in foreign operations, effective portion, and exchange differences on translation of financial statements of foreign operations recognised in other comprehensive income and accumulated in equity. + References No definition available. + Details
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