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Risk management policy - Loans to customers with allowance for impairment losses based on lifetime ECL modified (Details) - KZT (₸)
₸ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [abstract]    
Gross carrying amount of loans to customers that are impaired after modification but not NPL as at 1 January ₸ 68,029 ₸ 27,899
Gross carrying amount of modified loans to customers within period 157,179 109,386
Loans to customers transferred to non impaired category (cured loans) (92,276) (42,268)
Loans to customers transferred to NPL (33,178) (17,435)
Repaid loans to customers (19,742) (9,553)
Gross carrying amount of loans to customers that are impaired after modification but not NPL as at 31 December ₸ 80,012 ₸ 68,029