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Financial risk management - D.1. Interest rate risk (Details) - Fixed rate loans - Interest rate risk	Dec. 31, 2025	Dec. 31, 2024
Disclosure of nature and extent of risks arising from financial instruments [line items]
Percentage of debt	75.00%
Concentration percentage	70.00%	84.00%

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Financial Risk Management, Percentage Of Debt, Maximum

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Risk Exposure Associated With Instruments Sharing Characteristic, Concentration Percentage

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