v3.26.1
Insurance Risk Management - Summary of Maturity Analysis for Liquidity Risk that Arises from Contracts (Details) - Liquidity risk [member]
₩ in Millions
Dec. 31, 2025
KRW (₩)
Tongyang Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets ₩ 0
Insurance contracts liabilities (51,296,140)
Reinsurance Contract Assets (Liabilities) 911,855
ABL Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities (30,972,454)
Reinsurance Contract Assets (Liabilities) (144,259)
Within 1 Year | Tongyang Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities (925,682)
Reinsurance Contract Assets (Liabilities) 6,595
Within 1 Year | ABL Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities (279,094)
Reinsurance Contract Assets (Liabilities) (5,147)
1 to 2 Years | Tongyang Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities (4,055,435)
Reinsurance Contract Assets (Liabilities) 7,475
1 to 2 Years | ABL Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities (1,367,315)
Reinsurance Contract Assets (Liabilities) (2,808)
2 to 3 Years | Tongyang Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities 182,049
Reinsurance Contract Assets (Liabilities) 11,017
2 to 3 Years | ABL Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities (508,763)
Reinsurance Contract Assets (Liabilities) (2,452)
3 to 4 Years | Tongyang Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities (291,500)
Reinsurance Contract Assets (Liabilities) 13,347
3 to 4 Years | ABL Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities (629,346)
Reinsurance Contract Assets (Liabilities) (2,346)
4 to 5 Years | Tongyang Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities (542,751)
Reinsurance Contract Assets (Liabilities) 14,427
4 to 5 Years | ABL Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities (948,940)
Reinsurance Contract Assets (Liabilities) (2,195)
Over 5 Years | Tongyang Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities (5,906,147)
Reinsurance Contract Assets (Liabilities) 85,891
Over 5 Years | ABL Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities (5,442,969)
Reinsurance Contract Assets (Liabilities) (10,904)
Over 10 Years | Tongyang Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities (39,756,674)
Reinsurance Contract Assets (Liabilities) 773,103
Over 10 Years | ABL Life Insurance Co., Ltd.  
Disclosure of maturity analysis for liquidity risk that arises from contracts within scope of IFRS 17 [line items]  
Insurance contracts assets 0
Insurance contracts liabilities (21,796,027)
Reinsurance Contract Assets (Liabilities) ₩ (118,407)