v3.26.1
ACCOUNTING STANDARDS AND BASIS OF PREPARATION - Assumptions utilized to calculate ECL (Detail)
Dec. 31, 2025
Personal and Business Banking  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default 30.00%
Personal and Business Banking | Private Sector Deposits | Scenario one [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default 45.00%
Loss given default 45.00%
Personal and Business Banking | Private Sector Deposits | Scenario Two [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default 40.00%
Loss given default 40.00%
Personal and Business Banking | Private Sector Deposits | Scenario Three [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default 41.00%
Loss given default 41.00%
Personal and Business Banking | Real Badlar Rate (private banks) | Scenario one [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Loss given default 2.00%
Personal and Business Banking | Real Badlar Rate (private banks) | Scenario Two [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Loss given default (0.10%)
Personal and Business Banking | Real Badlar Rate (private banks) | Scenario Three [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Loss given default 3.70%
Personal and Business Banking | Monthly Economic Activity Estimator | Scenario one [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default 3.70%
Personal and Business Banking | Monthly Economic Activity Estimator | Scenario Two [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default 8.40%
Personal and Business Banking | Monthly Economic Activity Estimator | Scenario Three [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default (1.20%)
Corporate Banking  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default 30.00%
Corporate Banking | Private Sector Deposits | Scenario one [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Loss given default 45.00%
Corporate Banking | Private Sector Deposits | Scenario Two [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Loss given default 40.00%
Corporate Banking | Private Sector Deposits | Scenario Three [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Loss given default 41.00%
Corporate Banking | Real Badlar Rate (private banks) | Scenario one [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default 2.00%
Loss given default 2.00%
Corporate Banking | Real Badlar Rate (private banks) | Scenario Two [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default (0.10%)
Loss given default (0.10%)
Corporate Banking | Real Badlar Rate (private banks) | Scenario Three [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default 3.70%
Loss given default 3.70%
Corporate Banking | Blue cheap swap rate | Scenario one [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default 20.10%
Corporate Banking | Blue cheap swap rate | Scenario Two [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default (9.30%)
Corporate Banking | Blue cheap swap rate | Scenario Three [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default 66.90%
Corporate Banking | Interest Rate | Scenario one [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Loss given default 22.00%
Corporate Banking | Interest Rate | Scenario Two [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Loss given default 17.90%
Corporate Banking | Interest Rate | Scenario Three [member]  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Loss given default 42.00%