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Gains or losses on financial assets and liabilities - Schedule of detail, by origin, of gains/losses on financial assets and liability (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Financial instruments |  |  |
Gain or losses on financial assets and liabilities not measured at fair value through profit or loss, net | € 127 | € (117) | € 96
Financial assets at amortized cost | (89) | (190) | (3)
Other financial assets and liabilities | 216 | 73 | 99
Gain or losses on financial assets and liabilities held for trading, net | 1,017 | 1,344 | 2,316
Gains or losses on non-trading financial assets and liabilities mandatorily at fair value through profit or loss | 1,106 | 495 | 198
Gain or losses on financial assets and liabilities measured at fair value through profit or loss, net | (307) | 691 | (92)
Gain or losses from hedge accounting, net | 12 | 14 | 69
Gains/losses on financial assets and liabilities, net | 1,955 | 2,427 | 2,587
Debt securities |  |  |
Financial instruments |  |  |
Other financial assets and liabilities | € 133 | € 50 | € 51

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