v3.26.1
Employee benefits (Details 1) - KRW (₩)
₩ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]      
Changes in scope of consolidation ₩ 10,143,245    
Defined Benefit Obligation [Member]      
IfrsStatementLineItems [Line Items]      
Balance at Beginning 559,271 ₩ 706,102 ₩ 928,148
Current service cost 457,795 375,158 514,505
Past service credit 292,523 19,015 31,375
Gains on Settlement 1,132
Interest expense 46,760
Subtotal 798,210 394,173 545,880
Demographic assumption (4,954)
Financial assumption (47,762) 41,683 49,584
Adjustment based on experience (261,251) (80,813) (159,142)
Return on plan assets excluding interest income
Subtotal (309,013) (44,084) (109,558)
Changes in scope of consolidation 931,378
Benefits paid (316,267) (496,920) (658,368)
Subtotal 615,111 (496,920) (658,368)
Balance at end 1,663,579 559,271 706,102
Fair value of plan assets [Member]      
IfrsStatementLineItems [Line Items]      
Balance at Beginning
Current service cost
Past service credit
Gains on Settlement
Interest expense 9,126
Subtotal 9,126
Demographic assumption
Financial assumption
Adjustment based on experience
Return on plan assets excluding interest income 1,407
Subtotal 1,407
Changes in scope of consolidation 395,353
Benefits paid
Subtotal 395,353
Balance at end 405,886
Net defined benefit liabilities [Member]      
IfrsStatementLineItems [Line Items]      
Balance at Beginning 559,271 706,102 928,148
Current service cost 457,795 375,158 514,505
Past service credit 292,523 19,015 31,375
Gains on Settlement 1,132
Interest expense 37,634
Subtotal 789,084 394,173 545,880
Demographic assumption (4,954)
Financial assumption (47,762) 41,683 49,584
Adjustment based on experience (261,251) (80,813) (159,142)
Return on plan assets excluding interest income (1,407)
Subtotal (310,420) (44,084) (109,558)
Changes in scope of consolidation 536,025
Benefits paid (316,267) (496,920) (658,368)
Subtotal 219,758 (496,920) (658,368)
Balance at end ₩ 1,257,693 ₩ 559,271 ₩ 706,102