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Investments Securities and Derivatives - Summary of Debt Securities (Details) - KZT (₸)
₸ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of fair value measurement of assets [line items]    
Total financial assets at FVTOCI ₸ 1,489,682 ₸ 1,377,130
Debt Securities    
Disclosure of fair value measurement of assets [line items]    
Total financial assets at FVTOCI 1,489,205 1,376,728
Bonds of the Ministry of Finance of the Republic of Kazakhstan | Debt Securities    
Disclosure of fair value measurement of assets [line items]    
Total financial assets at FVTOCI ₸ 1,192,962 ₸ 930,726
Bonds of the Ministry of Finance of the Republic of Kazakhstan | Debt Securities | Minimum    
Disclosure of fair value measurement of assets [line items]    
Interest rate, % 0.60% 0.60%
Bonds of the Ministry of Finance of the Republic of Kazakhstan | Debt Securities | Maximum    
Disclosure of fair value measurement of assets [line items]    
Interest rate, % 16.70% 16.70%
Corporate Bonds    
Disclosure of fair value measurement of assets [line items]    
Total financial assets at FVTOCI ₸ 292,364 ₸ 252,946
Corporate Bonds | Minimum    
Disclosure of fair value measurement of assets [line items]    
Interest rate, % 2.00% 2.00%
Corporate Bonds | Maximum    
Disclosure of fair value measurement of assets [line items]    
Interest rate, % 15.88% 15.88%
Sovereign Bonds of Foreign Countries    
Disclosure of fair value measurement of assets [line items]    
Total financial assets at FVTOCI ₸ 3,475 ₸ 1,687
Sovereign Bonds of Foreign Countries | Minimum    
Disclosure of fair value measurement of assets [line items]    
Interest rate, % 0.63% 0.63%
Sovereign Bonds of Foreign Countries | Maximum    
Disclosure of fair value measurement of assets [line items]    
Interest rate, % 4.13% 3.50%
Discount Notes of the NBRK    
Disclosure of fair value measurement of assets [line items]    
Interest rate, % 14.62% 14.44%
Total financial assets at FVTOCI ₸ 404 ₸ 191,369