v3.26.1
Insurance Risk Management - Summary of Actual Claims Compared with Previous Estimates (Details) - Insurance risk [member]
₩ in Millions
Dec. 31, 2025
KRW (₩)
Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 ₩ 4,358,110
Actual claims that arise from contracts within scope of IFRS 17 4,278,692
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 1,656,016
Tongyang Life Insurance Co., Ltd. | Difference Between Claims Estimates and Claims Paid  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 79,418
Tongyang Life Insurance Co., Ltd. | Discount Effect  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 (6,613)
Tongyang Life Insurance Co., Ltd. | Claims Incurred but Expected to be Paid Within One Year  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 1,580,634
Tongyang Life Insurance Co., Ltd. | Risk Adjustment for Non-Financial Risk  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 2,577
ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 1,566,550
Actual claims that arise from contracts within scope of IFRS 17 1,520,063
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 614,935
ABL Life Insurance Co., Ltd. | Difference Between Claims Estimates and Claims Paid  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 46,487
ABL Life Insurance Co., Ltd. | Discount Effect  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 (4,441)
ABL Life Insurance Co., Ltd. | Claims Incurred but Expected to be Paid Within One Year  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 571,128
ABL Life Insurance Co., Ltd. | Risk Adjustment for Non-Financial Risk  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 1,761
Year of Claim Paid | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 3,457,526
Year of Claim Paid | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 1,261,560
After 1 year | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 676,368
After 1 year | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 223,846
After 2 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 88,515
After 2 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 25,735
After 3 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 35,953
After 3 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 7,868
After 4 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 20,330
After 4 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 1,055
Four years before reporting year [member] | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 2,339,594
Actual claims that arise from contracts within scope of IFRS 17 2,336,741
Four years before reporting year [member] | Tongyang Life Insurance Co., Ltd. | Difference Between Claims Estimates and Claims Paid  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 2,853
Four years before reporting year [member] | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 311,417
Actual claims that arise from contracts within scope of IFRS 17 310,962
Four years before reporting year [member] | ABL Life Insurance Co., Ltd. | Difference Between Claims Estimates and Claims Paid  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 455
Four years before reporting year [member] | Year of Claim Paid | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 1,812,292
Four years before reporting year [member] | Year of Claim Paid | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 243,473
Four years before reporting year [member] | After 1 year | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 411,882
Four years before reporting year [member] | After 1 year | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 54,825
Four years before reporting year [member] | After 2 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 63,012
Four years before reporting year [member] | After 2 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 8,415
Four years before reporting year [member] | After 3 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 29,225
Four years before reporting year [member] | After 3 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 3,194
Four years before reporting year [member] | After 4 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 20,330
Four years before reporting year [member] | After 4 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 1,055
Three years before reporting year [member] | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 467,507
Actual claims that arise from contracts within scope of IFRS 17 465,292
Three years before reporting year [member] | Tongyang Life Insurance Co., Ltd. | Difference Between Claims Estimates and Claims Paid  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 2,215
Three years before reporting year [member] | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 316,286
Actual claims that arise from contracts within scope of IFRS 17 315,392
Three years before reporting year [member] | ABL Life Insurance Co., Ltd. | Difference Between Claims Estimates and Claims Paid  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 894
Three years before reporting year [member] | Year of Claim Paid | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 364,924
Three years before reporting year [member] | Year of Claim Paid | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 245,603
Three years before reporting year [member] | After 1 year | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 81,397
Three years before reporting year [member] | After 1 year | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 56,432
Three years before reporting year [member] | After 2 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 12,243
Three years before reporting year [member] | After 2 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 8,683
Three years before reporting year [member] | After 3 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 6,728
Three years before reporting year [member] | After 3 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 4,674
Three years before reporting year [member] | After 4 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
Three years before reporting year [member] | After 4 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
Two years before reporting year [member] | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 488,120
Actual claims that arise from contracts within scope of IFRS 17 483,266
Two years before reporting year [member] | Tongyang Life Insurance Co., Ltd. | Difference Between Claims Estimates and Claims Paid  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 4,854
Two years before reporting year [member] | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 319,229
Actual claims that arise from contracts within scope of IFRS 17 316,612
Two years before reporting year [member] | ABL Life Insurance Co., Ltd. | Difference Between Claims Estimates and Claims Paid  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 2,617
Two years before reporting year [member] | Year of Claim Paid | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 385,828
Two years before reporting year [member] | Year of Claim Paid | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 251,974
Two years before reporting year [member] | After 1 year | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 84,178
Two years before reporting year [member] | After 1 year | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 56,002
Two years before reporting year [member] | After 2 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 13,260
Two years before reporting year [member] | After 2 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 8,637
Two years before reporting year [member] | After 3 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
Two years before reporting year [member] | After 3 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
Two years before reporting year [member] | After 4 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
Two years before reporting year [member] | After 4 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
One year before reporting year [member] | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 524,256
Actual claims that arise from contracts within scope of IFRS 17 512,923
One year before reporting year [member] | Tongyang Life Insurance Co., Ltd. | Difference Between Claims Estimates and Claims Paid  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 11,333
One year before reporting year [member] | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 303,193
Actual claims that arise from contracts within scope of IFRS 17 296,847
One year before reporting year [member] | ABL Life Insurance Co., Ltd. | Difference Between Claims Estimates and Claims Paid  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 6,346
One year before reporting year [member] | Year of Claim Paid | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 414,012
One year before reporting year [member] | Year of Claim Paid | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 240,260
One year before reporting year [member] | After 1 year | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 98,911
One year before reporting year [member] | After 1 year | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 56,587
One year before reporting year [member] | After 2 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
One year before reporting year [member] | After 2 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
One year before reporting year [member] | After 3 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
One year before reporting year [member] | After 3 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
One year before reporting year [member] | After 4 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
One year before reporting year [member] | After 4 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
Reporting year [member] | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 538,633
Actual claims that arise from contracts within scope of IFRS 17 480,470
Reporting year [member] | Tongyang Life Insurance Co., Ltd. | Difference Between Claims Estimates and Claims Paid  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 58,163
Reporting year [member] | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 316,425
Actual claims that arise from contracts within scope of IFRS 17 280,250
Reporting year [member] | ABL Life Insurance Co., Ltd. | Difference Between Claims Estimates and Claims Paid  
Disclosure of actual claims compared with previous estimates [line items]  
Liabilities for incurred claims that arise from contracts within scope of IFRS 17 36,175
Reporting year [member] | Year of Claim Paid | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 480,470
Reporting year [member] | Year of Claim Paid | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 280,250
Reporting year [member] | After 1 year | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
Reporting year [member] | After 1 year | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
Reporting year [member] | After 2 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
Reporting year [member] | After 2 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
Reporting year [member] | After 3 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
Reporting year [member] | After 3 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
Reporting year [member] | After 4 years | Tongyang Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 0
Reporting year [member] | After 4 years | ABL Life Insurance Co., Ltd.  
Disclosure of actual claims compared with previous estimates [line items]  
Estimate of undiscounted claims that arise from contracts within scope of IFRS 17 ₩ 0