Derivative financial instruments and hedge accounting (Tables)
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12 Months Ended |
Dec. 31, 2025 |
| Derivative financial instruments and hedge accounting |
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| Schedule of derivative financial instruments |
| | | | Fair value asset | Fair value liability | | Fair value asset | Fair value liability | | | | | | | | | Derivatives on interest rate | | | | | | | | | | | | | | | | | | | | | | | | | | | | Derivatives on exchange rate | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Derivatives on commodities | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fair value hedge derivatives | | | | | | | Derivatives on interest rate | | | | | | | | | | | | | | | | | | | | | Derivatives on exchange rate | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cash flow hedge derivatives | | | | | | | Derivatives on commodities | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (1,133) | (1,133) | | (1,508) | (1,508) | | | | | | | | | | | | | | | | | | | | | | |
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| Schedule of hedging derivative instruments |
| | | | Nominal amount of the hedging instrument | Change in fair value (effective hedge) | Change in fair value (ineffective hedge) | Nominal amount of the hedging instrument | Change in fair value (effective hedge) | Change in fair value (ineffective hedge) | Cash flow hedge derivatives | | | | | | | | | | | | | | | | 448 | | | (524) | | | | | | | (499) | | | | 632 | 3 | | (1,023) | | Other cash flow hedge derivatives | | | | | | | | | | | | (12) | | | | | | | (12) | | | | 632 | 3 | | (1,035) | | Fair value hedge derivatives | | | | | | | Derivatives on interest rate | | | | | | | | | (4) | | | | | | | (4) | | | | | Derivatives on exchange rate | | | | | | | | | | | | | | | | | | | | | | | (4) | | | | |
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| Schedule of breakdown of underlying asset or liability under cash flow hedge and fair value hedge |
| | | | Change of the underlying item used for the calculation of hedging ineffectiveness | | Reclassification adjustments | Change of the underlying item used for the calculation of hedging ineffectiveness | | Reclassification adjustments | Cash flow hedge derivatives | | | | | | | | | | | | | | - Planned sales | (600) | | (233) | | (850) | (123) | | | | | | | | Other cash flow hedge derivatives | | | | | | | - hedged flows | (26) | | | | (12) | |
| | | | Nominal amount of the underlying item | Cumulative changes of the underlying item | Changes of the underlying item | Nominal amount of the underlying item | Cumulative changes of the underlying item | Changes of the underlying item | Fair value hedge derivatives | | | | | | | Derivatives on interest rate | | | | | | | | | | (5) | | | 44 | | | | | | | | Derivatives on exchange rate | | | | | | | | | | | | | |
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| Schedule of effects recognized in other operating profit (loss) |
| | | | Net income (loss) on cash flow hedging derivatives | 3 | | | Net income (loss) on other derivatives | 638 | (378) | | | 641 | (352) | |
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| Schedule of effects recognized in finance income (loss) |
| | | | Derivatives on exchange rate | (86) | | (63) | Derivatives on interest rate | 6 | (32) | | | (80) | | (61) |
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