v3.26.1
General administrative expenses and other net operating income (expenses) - Details of share based payment (Details)
₩ in Millions
12 Months Ended
Sep. 30, 2024
shares
Dec. 31, 2025
KRW (₩)
yr
shares
Dec. 31, 2024
KRW (₩)
shares
Shares granted for the year 2021      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Subject to   Shares granted for the year 2021  
Type of payment   Cash-settled  
Vesting period   January 1, 2021 ~ December 31, 2024  
Date of payment   Jan. 01, 2025  
Fair Value | ₩ [1]   ₩ 15,831  
Valuation method   Black-Scholes Model  
Expected dividend rate   6.48%  
Expected maturity date | yr   0  
Number of shares remaining   56,029 1,105,292
Number of shares granted [2]   56,029 1,105,292
Information about how fair value was measured, share options granted   As the amount of payment varies according to the base price (the arithmetic average of the weighted average stock price of transactions in the past one week, the past one month, and the past two months) at the date of payment, the fair value is measured according to the Black-Scholes model based on the base price at the time of each settlement and used for measuring the liability.  
Description of vesting requirements for share-based payment arrangement   The number of payable stocks is granted at the initial contract date. This is a system in which the number of shares to be granted is determined based on the evaluation results of long-term performance indicators over a total of four years, including the current year, and the final cash compensation is made by reflecting the stock price at the time of payment. Long-term performance indicators include relative shareholder return, common equity ratio, return on equity, net income, selling, general and administrative expenses ratio, non-performing loan ratio, and performance of assigned duties.  
Explanation of effect of share-based payments on entity's financial position [text block]   The Group accounts for performance condition share-based payments according to the cash-settled method and the fair value of the liabilities is reflected in the compensation costs by re-measuring every closing period.  
Shares granted for the year 2022      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Subject to   Shares granted for the year 2022  
Type of payment   Cash-settled  
Vesting period   January 1, 2022 ~ December 31, 2025  
Date of payment   Jan. 01, 2026  
Fair Value | ₩ [1]   ₩ 27,713  
Valuation method   Black-Scholes Model  
Expected dividend rate   7.30%  
Expected maturity date | yr   0  
Number of shares remaining   960,777 960,777
Number of shares granted [2]   960,777 960,777
Information about how fair value was measured, share options granted   As the amount of payment varies according to the base price (the arithmetic average of the weighted average stock price of transactions in the past one week, the past one month, and the past two months) at the date of payment, the fair value is measured according to the Black-Scholes model based on the base price at the time of each settlement and used for measuring the liability.  
Description of vesting requirements for share-based payment arrangement   The number of payable stocks is granted at the initial contract date. This is a system in which the number of shares to be granted is determined based on the evaluation results of long-term performance indicators over a total of four years, including the current year, and the final cash compensation is made by reflecting the stock price at the time of payment. Long-term performance indicators include relative shareholder return, common equity ratio, return on equity, net income, selling, general and administrative expenses ratio, non-performing loan ratio, and performance of assigned duties.  
Explanation of effect of share-based payments on entity's financial position [text block]   The Group accounts for performance condition share-based payments according to the cash-settled method and the fair value of the liabilities is reflected in the compensation costs by re-measuring every closing period.  
Shares granted for the year 2023      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Subject to   Shares granted for the year 2023  
Type of payment   Cash-settled  
Vesting period   January 1, 2023 ~ December 31, 2026  
Date of payment   Jan. 01, 2027  
Fair Value | ₩ [1]   ₩ 25,763  
Valuation method   Black-Scholes Model  
Expected dividend rate   7.30%  
Expected maturity date | yr   1  
Number of shares remaining   916,849 916,849
Number of shares granted [2] 916,849 916,849  
Information about how fair value was measured, share options granted   As the amount of payment varies according to the base price (the arithmetic average of the weighted average stock price of transactions in the past one week, the past one month, and the past two months) at the date of payment, the fair value is measured according to the Black-Scholes model based on the base price at the time of each settlement and used for measuring the liability.  
Description of vesting requirements for share-based payment arrangement   The number of payable stocks is granted at the initial contract date. This is a system in which the number of shares to be granted is determined based on the evaluation results of long-term performance indicators over a total of four years, including the current year, and the final cash compensation is made by reflecting the stock price at the time of payment. Long-term performance indicators include relative shareholder return, common equity ratio, return on equity, net income, selling, general and administrative expenses ratio, non-performing loan ratio, and performance of assigned duties.  
Explanation of effect of share-based payments on entity's financial position [text block]   The Group accounts for performance condition share-based payments according to the cash-settled method and the fair value of the liabilities is reflected in the compensation costs by re-measuring every closing period.  
Shares granted for the year 2024      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Subject to   Shares granted for the year 2024  
Type of payment   Cash-settled  
Vesting period   January 1, 2024 ~ December 31, 2027  
Date of payment   Jan. 01, 2028  
Fair Value | ₩ [1]   ₩ 23,949  
Valuation method   Black-Scholes Model  
Expected dividend rate   7.30%  
Expected maturity date | yr   2  
Number of shares remaining   1,384,504 1,384,504
Number of shares granted [2]   1,384,504 1,384,504
Information about how fair value was measured, share options granted   As the amount of payment varies according to the base price (the arithmetic average of the weighted average stock price of transactions in the past one week, the past one month, and the past two months) at the date of payment, the fair value is measured according to the Black-Scholes model based on the base price at the time of each settlement and used for measuring the liability.  
Description of vesting requirements for share-based payment arrangement   The number of payable stocks is granted at the initial contract date. This is a system in which the number of shares to be granted is determined based on the evaluation results of long-term performance indicators over a total of four years, including the current year, and the final cash compensation is made by reflecting the stock price at the time of payment. Long-term performance indicators include relative shareholder return, common equity ratio, return on equity, net income, selling, general and administrative expenses ratio, non-performing loan ratio, and performance of assigned duties.  
Explanation of effect of share-based payments on entity's financial position [text block]   The Group accounts for performance condition share-based payments according to the cash-settled method and the fair value of the liabilities is reflected in the compensation costs by re-measuring every closing period.  
Shares granted for the year 2025      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Subject to   Shares granted for the year 2025  
Type of payment   Cash-settled  
Vesting period   January 1, 2025 ~ December 31, 2028  
Date of payment   Jan. 01, 2029  
Fair Value | ₩ [1]   ₩ 22,263  
Valuation method   Black-Scholes Model  
Expected dividend rate   7.30%  
Expected maturity date | yr   3  
Number of shares remaining   1,048,842 0
Number of shares granted [2]   1,048,842 0
Information about how fair value was measured, share options granted   As the amount of payment varies according to the base price (the arithmetic average of the weighted average stock price of transactions in the past one week, the past one month, and the past two months) at the date of payment, the fair value is measured according to the Black-Scholes model based on the base price at the time of each settlement and used for measuring the liability.  
Description of vesting requirements for share-based payment arrangement   The number of payable stocks is granted at the initial contract date. This is a system in which the number of shares to be granted is determined based on the evaluation results of long-term performance indicators over a total of four years, including the current year, and the final cash compensation is made by reflecting the stock price at the time of payment. Long-term performance indicators include relative shareholder return, common equity ratio, return on equity, net income, selling, general and administrative expenses ratio, non-performing loan ratio, and performance of assigned duties.  
Explanation of effect of share-based payments on entity's financial position [text block]   The Group accounts for performance condition share-based payments according to the cash-settled method and the fair value of the liabilities is reflected in the compensation costs by re-measuring every closing period.  
Share-based payment arrangements      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Liabilities from share-based payment transactions | ₩   ₩ 107,713 ₩ 62,557
Liabilities related to key management | ₩   ₩ 43,823 ₩ 16,660
[1] As the amount of payment varies according to the base price (the arithmetic average of the weighted average stock price of transactions in the past one week, the past one month, and the past two months) at the date of payment, the fair value is measured according to the Black-Scholes model based on the base price at the time of each settlement and used for measuring the liability.
[2] The number of payable stocks is granted at the initial contract date. This is a system in which the number of shares to be granted is determined based on the evaluation results of long-term performance indicators over a total of four years, including the current year, and the final cash compensation is made by reflecting the stock price at the time of payment. Long-term performance indicators include relative shareholder return, common equity ratio, return on equity, net income, selling, general and administrative expenses ratio, non-performing loan ratio, and performance of assigned duties.