XML 277 R264.htm IDEA: XBRL DOCUMENT v3.26.1
Liability under insurance contracts and reinsurance contracts - Summary of reinsurance contracts that did not apply the premium allocation approach recognized for the first time (Details) - Insurance contracts other than those to which premium allocation approach has been applied [member] - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) ₩ 32,646 ₩ 27,640
Reinsurance contracts held    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 1,638 1,480
Reinsurance contracts held | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 1,638 1,480
Reinsurance contracts held | Groups of contracts issued other than net profit contracts [Member] | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 1,364 490
Reinsurance contracts held | Groups of net profit contracts issued [Member] | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 274 990
Other than insurance acquisition cash flow amount [member] | Reinsurance contracts held | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) (1,808,769) (224,169)
Other than insurance acquisition cash flow amount [member] | Reinsurance contracts held | Groups of contracts issued other than net profit contracts [Member] | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) (1,746,549) (160,095)
Other than insurance acquisition cash flow amount [member] | Reinsurance contracts held | Groups of net profit contracts issued [Member] | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) (62,220) (64,074)
Insurance acquisition cash flow amount [member] | Reinsurance contracts held | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 0 0
Insurance acquisition cash flow amount [member] | Reinsurance contracts held | Groups of contracts issued other than net profit contracts [Member] | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 0 0
Insurance acquisition cash flow amount [member] | Reinsurance contracts held | Groups of net profit contracts issued [Member] | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 0 0
Present value estimate of future cash inflows [member] | Reinsurance contracts held | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 1,539,839 178,048
Present value estimate of future cash inflows [member] | Reinsurance contracts held | Groups of contracts issued other than net profit contracts [Member] | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 1,478,971 109,889
Present value estimate of future cash inflows [member] | Reinsurance contracts held | Groups of net profit contracts issued [Member] | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 60,868 68,159
Risk adjustment for non-financial risks [member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 224,776 157,279
Risk adjustment for non-financial risks [member] | Reinsurance contracts held    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 16,978 4,672
Risk adjustment for non-financial risks [member] | Reinsurance contracts held | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 16,978 4,672
Risk adjustment for non-financial risks [member] | Reinsurance contracts held | Groups of contracts issued other than net profit contracts [Member] | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 15,475 3,098
Risk adjustment for non-financial risks [member] | Reinsurance contracts held | Groups of net profit contracts issued [Member] | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 1,503 1,574
Contractual service margin [member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 1,649,798 1,266,258
Contractual service margin [member] | Reinsurance contracts held    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 253,590 42,929
Contractual service margin [member] | Reinsurance contracts held | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 253,590 42,929
Contractual service margin [member] | Reinsurance contracts held | Groups of contracts issued other than net profit contracts [Member] | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) 253,467 47,598
Contractual service margin [member] | Reinsurance contracts held | Groups of net profit contracts issued [Member] | Premium Allocation Approach [Member]    
Disclosure of effect of insurance contracts initially recognised [line items]    
Increase (decrease) through effects of contracts initially recognised in period, insurance contracts liability (asset) ₩ 123 ₩ (4,669)