Financial risk management - Additional information (Detail) - TRY (₺) ₺ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Disclosure of nature and extent of risks arising from financial instruments
Financial guarantees outstanding	₺ 21,607,347	₺ 14,613,792
Financial assets held for managing liquidity risk	₺ 5,595,255	₺ 6,029,132

The amount of the exposure to credit risk on loan commitments and financial guarantee contracts. [Refer: Loan commitments [member]; Financial guarantee contracts [member]; Credit risk [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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+ Details