Employee benefits - Summary of employee benefits provision (Detail) - TRY (₺) ₺ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Classes of employee benefits expense
Retirement pay liability provision	₺ 2,074,592	₺ 3,144,599	₺ 3,183,356
Unused vacation provision	816,101	824,158
Total	₺ 2,890,693	₺ 3,968,757

The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [domain]]

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
-Note Effective 2027-01-01
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