v3.25.4
Note 7 Probability of default of loans and advances to customers (Details)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Subject to 12 month ECL [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 95.10% 94.50% 92.40%
Subject to 12 month ECL [Member] | 0 to 2 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 5.20% 3.20% 3.80%
Subject to 12 month ECL [Member] | 2 to 5 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 13.80% 9.00% 10.70%
Subject to 12 month ECL [Member] | 5 to 11 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 19.10% 17.10% 25.40%
Subject to 12 month ECL [Member] | 11 to 39 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 24.60% 29.70% 21.70%
Subject to 12 month ECL [Member] | 39 to 194 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 21.20% 23.50% 20.60%
Subject to 12 month ECL [Member] | 194 to 1061 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 9.50% 10.20% 8.70%
Subject to 12 month ECL [Member] | 1061 to 2121 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 1.10% 1.20% 1.00%
Subject to 12 month ECL [Member] | More than 2121 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 0.50% 0.70% 0.50%
Subject to lifetime ECL [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 4.90% 5.50% 7.60%
Subject to lifetime ECL [Member] | 0 to 2 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 0.00% 0.00% 0.00%
Subject to lifetime ECL [Member] | 2 to 5 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 0.00% 0.00% 0.20%
Subject to lifetime ECL [Member] | 5 to 11 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 0.10% 0.00% 0.50%
Subject to lifetime ECL [Member] | 11 to 39 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 0.50% 0.60% 1.30%
Subject to lifetime ECL [Member] | 39 to 194 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 1.40% 1.70% 2.10%
Subject to lifetime ECL [Member] | 194 to 1061 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 1.70% 1.60% 2.20%
Subject to lifetime ECL [Member] | 1061 to 2121 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 0.70% 0.50% 0.60%
Subject to lifetime ECL [Member] | More than 2121 [Member]      
Disclosure of probability of default [Line Items]      
Probability of default of loans and advances to customers 0.60% 0.90% 0.80%