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Financial Assets at Fair Value Through Other Comprehensive Income - Summary of Financial Assets at Fair Value Through Other Comprehensive Income (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Financial assets at fair value through other comprehensive income [Line Items]      
Acquisition Cost ₩ 625,418 ₩ 594,355  
Book value 502,443 502,829 ₩ 435,107
Fair value 502,443 502,829  
Listed equity securities      
Financial assets at fair value through other comprehensive income [Line Items]      
Acquisition Cost 325,220 324,790  
Book value 285,054 300,057 273,826
Fair value ₩ 285,054 ₩ 300,057  
Korea District Heating Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 2,264,068 2,264,068  
Ownership 19.55% 19.55%  
Acquisition Cost ₩ 173,201 ₩ 173,201  
Book value 55,356 64,526  
Fair value ₩ 55,356 ₩ 64,526  
KG Mobility Co., Ltd. (formerly, Ssangyong Motor Co., Ltd.)      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 12,205 12,205  
Ownership 0.01% 0.03%  
Acquisition Cost ₩ 428 ₩ 428  
Book value 106 107  
Fair value ₩ 106 ₩ 107  
SM Korea Line Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 180 180  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 1 ₩ 1  
Book value 0 0  
Fair value ₩ 0 ₩ 0  
Namkwang Engineering & Construction Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 46 121  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 15 ₩ 15  
Book value 0 0  
Fair value ₩ 0 ₩ 0  
Bumyang Construction Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 35 35  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 2 ₩ 2  
Book value 0 0  
Fair value ₩ 0 ₩ 0  
ELCOMTEC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 32,875 32,875  
Ownership 0.04% 0.04%  
Acquisition Cost ₩ 217 ₩ 217  
Book value 43 34  
Fair value ₩ 43 ₩ 34  
PAN Ocean Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,492 1,492  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 14 ₩ 14  
Book value 6 9  
Fair value ₩ 6 ₩ 9  
STX Heavy Industries Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 68,874 7,419  
Ownership 0.24% 0.03%  
Acquisition Cost ₩ 537 ₩ 107  
Book value 806 54  
Fair value ₩ 806 ₩ 54  
Codes Combine Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 291 291  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 1 ₩ 1  
Book value 1 1  
Fair value ₩ 1 ₩ 1  
PT Adaro Energy Tbk.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 480,000,000 480,000,000  
Ownership 1.50% 1.50%  
Acquisition Cost ₩ 65,028 ₩ 65,028  
Book value 95,505 149,503  
Fair value ₩ 95,505 ₩ 149,503  
Denison Mines Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 58,284,000 58,284,000  
Ownership 6.54% 7.09%  
Acquisition Cost ₩ 84,134 ₩ 84,134  
Book value 131,790 84,502  
Fair value ₩ 131,790 ₩ 84,502  
Fission Uranium Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 100,000 100,000  
Ownership 0.01% 1.73%  
Acquisition Cost ₩ 41 ₩ 41  
Book value 105 75  
Fair value ₩ 105 ₩ 75  
SangSangin Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,457 5,831  
Ownership 0.01% 0.01%  
Acquisition Cost ₩ 38 ₩ 38  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
Vitzosys Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 399 399  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 2 ₩ 2  
Book value 0 0  
Fair value ₩ 0 ₩ 0  
EMnI Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 628 628  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 25 ₩ 25  
Book value 1 3  
Fair value ₩ 1 ₩ 3  
Vissem electronics, Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 301 229  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 11 ₩ 11  
Book value 1 1  
Fair value ₩ 1 ₩ 1  
KC Industry Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 139 139  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 6 ₩ 6  
Book value 0 0  
Fair value ₩ 0 ₩ 0  
Ihsung CNI Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 142,860 142,860  
Ownership 4.81% 4.81%  
Acquisition Cost ₩ 1,500 ₩ 1,500  
Book value 1,327 1,229  
Fair value ₩ 1,327 ₩ 1,229  
Aone Alform Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 2,672 2,672  
Ownership 0.04% 0.04%  
Acquisition Cost ₩ 19 ₩ 19  
Book value 4 10  
Fair value ₩ 4 10  
BDI Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 6,390,478    
Ownership [1] 32.54%    
Acquisition Cost [1] ₩ 0    
Book value [1] 0    
Fair value [1] 0    
Unlisted equity securities      
Financial assets at fair value through other comprehensive income [Line Items]      
Acquisition Cost [2] 295,627 269,065  
Book value 212,762 [2] 202,243 [2] ₩ 160,790
Fair value [2] ₩ 212,762 ₩ 202,243  
Intellectual Discovery Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   200,000  
Ownership [2]   6.00%  
Acquisition Cost [2]   ₩ 5,000  
Book value [2]   954  
Fair value [2]   ₩ 954  
Hwan Young Steel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 10,916 10,916  
Ownership [2] 0.14% 0.14%  
Acquisition Cost [2] ₩ 1,092 ₩ 1,092  
Book value [2] 97 97  
Fair value [2] ₩ 97 ₩ 97  
SAMBO AUTO. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 15,066 15,066  
Ownership [2] 0.02% 0.02%  
Acquisition Cost [2] ₩ 38 ₩ 38  
Book value [2] 38 38  
Fair value [2] ₩ 38 ₩ 38  
Mobo Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 504 504  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 14 ₩ 14  
Book value [2] 14 14  
Fair value [2] ₩ 14 ₩ 14  
Dae Kwang Semiconductor Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 589 589  
Ownership [2] 0.07% 0.07%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
Sanbon Department Store      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 828 828  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 124 ₩ 124  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Miju Steel Mfg. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,097 1,097  
Ownership [2] 0.23% 0.23%  
Acquisition Cost [2] ₩ 50 ₩ 50  
Book value [2] 50 50  
Fair value [2] ₩ 50 ₩ 50  
Sungwon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 117 117  
Ownership [2] 0.07% 0.07%  
Acquisition Cost [2] ₩ 29 ₩ 29  
Book value [2] 29 29  
Fair value [2] ₩ 29 ₩ 29  
IMHWA Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 329 329  
Ownership [2] 0.11% 0.11%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
DALIM Special Vehicle Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 58 58  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 10 ₩ 10  
Book value [2] 10 10  
Fair value [2] ₩ 10 ₩ 10  
Moonkyung Silica Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 42 42  
Ownership [2] 0.56% 0.56%  
Acquisition Cost [2] ₩ 0 ₩ 0  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Sungkwang Timber Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 3 3  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
KS Remicon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 12 12  
Ownership [2] 0.04% 0.04%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Joongang Platec Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 3,591 3,591  
Ownership [2] 0.75% 0.75%  
Acquisition Cost [2] ₩ 72 ₩ 72  
Book value [2] 35 35  
Fair value [2] ₩ 35 ₩ 35  
Pyungsan SI Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 434 434  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
Samgong Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 12 12  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 7 ₩ 7  
Book value [2] 7 7  
Fair value [2] ₩ 7 ₩ 7  
Joongang Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 540 540  
Ownership [2] 0.12% 0.12%  
Acquisition Cost [2] ₩ 8 ₩ 8  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
Newasia Co., Ltd. (formerly, AJS Co., Ltd.)      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 12,906 12,906  
Ownership [2] 0.23% 0.23%  
Acquisition Cost [2] ₩ 32 ₩ 32  
Book value [2] 32 32  
Fair value [2] ₩ 32 ₩ 32  
MSE Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 429 429  
Ownership [2] 0.13% 0.13%  
Acquisition Cost [2] ₩ 9 ₩ 9  
Book value [2] 9 9  
Fair value [2] ₩ 9 ₩ 9  
Ilrim Nano Tec Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,520 1,520  
Ownership [2] 0.07% 0.07%  
Acquisition Cost [2] ₩ 15 ₩ 15  
Book value [2] 15 15  
Fair value [2] ₩ 15 ₩ 15  
Ilsuk Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 152 152  
Ownership [2] 0.17% 0.17%  
Acquisition Cost [2] ₩ 10 ₩ 10  
Book value [2] 10 10  
Fair value [2] ₩ 10 ₩ 10  
Zyle Daewoo Motor Sales Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 22 22  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 0 ₩ 0  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Daewoo Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 8 8  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 0 ₩ 0  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Seyang Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 537 537  
Ownership [2] 0.05% 0.05%  
Acquisition Cost [2] ₩ 27 ₩ 27  
Book value [2] 30 30  
Fair value [2] ₩ 30 ₩ 30  
Seungri Enterprise Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 93 93  
Ownership [2] 0.05% 0.05%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Shin-E P&C Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,569 1,569  
Ownership [2] 0.64% 0.64%  
Acquisition Cost [2] ₩ 110 ₩ 110  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Ejung Ad Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 132 132  
Ownership [2] 0.09% 0.09%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Solvus Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,056 1,056  
Ownership [2] 0.04% 0.04%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Myung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 89 89  
Ownership [2] 0.05% 0.05%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Biwang Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 406 406  
Ownership [2] 0.04% 0.04%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Young Sung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 89 89  
Ownership [2] 0.40% 0.40%  
Acquisition Cost [2] ₩ 26 ₩ 26  
Book value [2] 26 26  
Fair value [2] ₩ 26 ₩ 26  
Yuil Industrial Electronics Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 804 804  
Ownership [2] 0.32% 0.32%  
Acquisition Cost [2] ₩ 15 ₩ 15  
Book value [2] 15 15  
Fair value [2] ₩ 15 ₩ 15  
Woojin Industry Corporation      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 3 3  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 16 ₩ 16  
Book value [2] 16 16  
Fair value [2] ₩ 16 ₩ 16  
Kwang Sung Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 325 325  
Ownership [2] 0.35% 0.35%  
Acquisition Cost [2] ₩ 7 ₩ 7  
Book value [2] 7 7  
Fair value [2] ₩ 7 ₩ 7  
Futech Mold Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 274 274  
Ownership [2] 0.27% 0.27%  
Acquisition Cost [2] ₩ 14 ₩ 14  
Book value [2] 14 14  
Fair value [2] ₩ 14 ₩ 14  
Woojoo Environment Ind. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 101 101  
Ownership [2] 0.11% 0.11%  
Acquisition Cost [2] ₩ 13 ₩ 13  
Book value [2] 13 13  
Fair value [2] ₩ 13 ₩ 13  
Hyungji Esquire Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 61 61  
Ownership [2] 0.02% 0.02%  
Acquisition Cost [2] ₩ 22 ₩ 22  
Book value [2] 22 22  
Fair value [2] ₩ 22 ₩ 22  
Morado Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 209 209  
Ownership [2] 0.04% 0.04%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Myung Sung Tex Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 20 20  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Kwang Sung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 610 610  
Ownership [2] 0.53% 0.53%  
Acquisition Cost [2] ₩ 31 ₩ 31  
Book value [2] 31 31  
Fair value [2] ₩ 31 ₩ 31  
Seen Business and Technology Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 29,424 29,424  
Ownership [2] 0.73% 0.73%  
Acquisition Cost [2] ₩ 148 ₩ 148  
Book value [2] 7 7  
Fair value [2] ₩ 7 ₩ 7  
Woobang Construction Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 8 8  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 8 ₩ 8  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
Shin Pyung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 6 6  
Ownership [2] 0.03% 0.03%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
JMC Heavy Industries Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 2,724 2,724  
Ownership [2] 0.10% 0.10%  
Acquisition Cost [2] ₩ 27 ₩ 27  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Najin Steel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 37 37  
Ownership [2] 0.06% 0.06%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
Sinkwang Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,091 1,091  
Ownership [2] 1.68% 1.68%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
Elephant & Friends Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 563 563  
Ownership [2] 0.61% 0.61%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Mireco Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 109 109  
Ownership [2] 0.25% 0.25%  
Acquisition Cost [2] ₩ 11 ₩ 11  
Book value [2] 11 11  
Fair value [2] ₩ 11 ₩ 11  
L&K Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,615 1,615  
Ownership [2] 0.60% 0.60%  
Acquisition Cost [2] ₩ 24 ₩ 24  
Book value [2] 24 24  
Fair value [2] ₩ 24 ₩ 24  
JO Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,263 1,263  
Ownership [2] 0.62% 0.62%  
Acquisition Cost [2] ₩ 25 ₩ 25  
Book value [2] 25 25  
Fair value [2] ₩ 25 ₩ 25  
Kendae Printing Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 422 422  
Ownership [2] 0.60% 0.60%  
Acquisition Cost [2] ₩ 21 ₩ 21  
Book value [2] 21 21  
Fair value [2] ₩ 21 ₩ 21  
Dauning Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 231 231  
Ownership [2] 0.41% 0.41%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
Korea Trecision Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 22 22  
Ownership [2] 0.45% 0.45%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
Hurim Biocell Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,021 1,021  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
Smart Power Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   133,333  
Ownership [2]   4.14%  
Acquisition Cost [2]   ₩ 200  
Book value [2]   200  
Fair value [2]   ₩ 200  
Sunjin Power Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 4,941 4,941  
Ownership [2] 0.92% 0.92%  
Acquisition Cost [2] ₩ 247 ₩ 247  
Book value [2] 32 32  
Fair value [2] ₩ 32 ₩ 32  
Beer Yeast Korea Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,388 1,388  
Ownership [2] 0.43% 0.43%  
Acquisition Cost [2] ₩ 7 ₩ 7  
Book value [2] 7 7  
Fair value [2] ₩ 7 ₩ 7  
B CON Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 96 96  
Ownership [2] 1.16% 1.16%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
Ace Integration Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 105 105  
Ownership [2] 0.09% 0.09%  
Acquisition Cost [2] ₩ 24 ₩ 24  
Book value [2] 24 24  
Fair value [2] ₩ 24 ₩ 24  
AceInti Agricultural Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 16 16  
Ownership [2] 0.02% 0.02%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
KyungDong Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 130 130  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
ChunWon Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 193 193  
Ownership [2] 0.19% 0.19%  
Acquisition Cost [2] ₩ 39 ₩ 39  
Book value [2] 39 39  
Fair value [2] ₩ 39 ₩ 39  
SungLim Industrial Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 29 29  
Ownership [2] 0.03% 0.03%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Korea Minerals Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 191 191  
Ownership [2] 0.05% 0.05%  
Acquisition Cost [2] ₩ 134 ₩ 134  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
HyoDong Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 128 128  
Ownership [2] 0.16% 0.16%  
Acquisition Cost [2] ₩ 25 ₩ 25  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
JoHyun Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 350 350  
Ownership [2] 1.56% 1.56%  
Acquisition Cost [2] ₩ 18 ₩ 18  
Book value [2] 18 18  
Fair value [2] ₩ 18 ₩ 18  
KC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 5,107 5,107  
Ownership [2] 0.17% 0.17%  
Acquisition Cost [2] ₩ 26 ₩ 26  
Book value [2] 26 26  
Fair value [2] ₩ 26 ₩ 26  
SeongJi Industrial Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 41 41  
Ownership [2] 0.05% 0.05%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Seyang Precision Ind.Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 829 829  
Ownership [2] 0.23% 0.23%  
Acquisition Cost [2] ₩ 41 ₩ 41  
Book value [2] 41 41  
Fair value [2] ₩ 41 ₩ 41  
Dooriwon Food System Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 13 13  
Ownership [2] 0.27% 0.27%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Sung Kwang Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 23 23  
Ownership [2] 0.37% 0.37%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
Shinheung Petrol. Co. Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 699 699  
Ownership [2] 0.14% 0.14%  
Acquisition Cost [2] ₩ 35 ₩ 35  
Book value [2] 35 35  
Fair value [2] ₩ 35 ₩ 35  
Force TEC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   3,501  
Ownership [2]   0.02%  
Acquisition Cost [2]   ₩ 18  
Book value [2]   18  
Fair value [2]   ₩ 18  
Samsung Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 486 486  
Ownership [2] 1.28% 1.28%  
Acquisition Cost [2] ₩ 97 ₩ 97  
Book value [2] 36 36  
Fair value [2] ₩ 36 ₩ 36  
Younil Metal Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 41 41  
Ownership [2] 0.21% 0.21%  
Acquisition Cost [2] ₩ 21 ₩ 21  
Book value [2] 21 21  
Fair value [2] ₩ 21 ₩ 21  
Sevenvalley JC (formerly, CJ Paradise Co., Ltd.)      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 24 24  
Ownership [2] 0.02% 0.02%  
Acquisition Cost [2] ₩ 12 ₩ 12  
Book value [2] 12 12  
Fair value [2] ₩ 12 ₩ 12  
Han Young Technology Company Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 35 35  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 0 ₩ 0  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Ptotronics Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 843 843  
Ownership [2] 0.42% 0.42%  
Acquisition Cost [2] ₩ 84 ₩ 84  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
NFT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 136 136  
Ownership [2] 0.40% 0.40%  
Acquisition Cost [2] ₩ 8 ₩ 8  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
Hyundaitech Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,363 1,363  
Ownership [2] 0.87% 0.87%  
Acquisition Cost [2] ₩ 27 ₩ 27  
Book value [2] 27 27  
Fair value [2] ₩ 27 ₩ 27  
Dasan Material Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 29 29  
Ownership [2] 0.04% 0.04%  
Acquisition Cost [2] ₩ 22 ₩ 22  
Book value [2] 22 22  
Fair value [2] ₩ 22 ₩ 22  
Fish World Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 47 47  
Ownership [2] 0.21% 0.21%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
SG Shinsung Engineering and Construction Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 10 10  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Samdo Industry Electric Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 48 48  
Ownership [2] 0.02% 0.02%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Taejung Industries Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 9,268 9,268  
Ownership [2] 0.30% 0.30%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
Shinsei Trading Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 64 64  
Ownership [2] 0.72% 0.72%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
Dynamic Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 111 111  
Ownership [2] 0.19% 0.19%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Green Alchemy Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 38,202 38,202  
Ownership [2] 1.48% 1.48%  
Acquisition Cost [2] ₩ 191 ₩ 191  
Book value [2] 17 17  
Fair value [2] ₩ 17 ₩ 17  
Youone TBM Engineering & Construction Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   615  
Ownership [2]   0.27%  
Acquisition Cost [2]   ₩ 31  
Book value [2]   31  
Fair value [2]   ₩ 31  
KM Leatech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,648 1,648  
Ownership [2] 0.98% 0.98%  
Acquisition Cost [2] ₩ 8 ₩ 8  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
Semist Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 555 555  
Ownership [2] 0.80% 0.80%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Sewon Bus Co.,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 12 12  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 0 ₩ 0  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Enertec Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 7,937 7,937  
Ownership [2] 0.19% 0.19%  
Acquisition Cost [2] ₩ 44 ₩ 44  
Book value [2] 44 44  
Fair value [2] ₩ 44 ₩ 44  
Sangji Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 20 20  
Ownership [2] 0.26% 0.26%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
Bellie Doughnuts Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 169 169  
Ownership [2] 0.19% 0.19%  
Acquisition Cost [2] ₩ 10 ₩ 10  
Book value [2] 10 10  
Fair value [2] ₩ 10 ₩ 10  
AIRTECH Information communication Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   2,379  
Ownership [2]   0.60%  
Acquisition Cost [2]   ₩ 12  
Book value [2]   12  
Fair value [2]   ₩ 12  
Kiscom Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   1,493  
Ownership [2]   0.04%  
Acquisition Cost [2]   ₩ 1  
Book value [2]   1  
Fair value [2]   ₩ 1  
Set Holding      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,100,220 [3] 1,100,220 [4]  
Ownership [2] 2.50% [3] 2.50% [4]  
Acquisition Cost [2] ₩ 229,255 [3] ₩ 229,255 [4]  
Book value [2] 165,923 [3] 163,580 [4]  
Fair value [2] ₩ 165,923 [3] ₩ 163,580 [4]  
Choheung packing Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 61 61  
Ownership [2] 0.13% 0.13%  
Acquisition Cost [2] ₩ 12 ₩ 12  
Book value [2] 12 12  
Fair value [2] ₩ 12 ₩ 12  
Jaewoo Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 359 359  
Ownership [2] 0.24% 0.24%  
Acquisition Cost [2] ₩ 11 ₩ 11  
Book value [2] 11 11  
Fair value [2] ₩ 11 ₩ 11  
Wooyang HC Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,375 1,375  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 159 ₩ 159  
Book value [2] 13 13  
Fair value [2] ₩ 13 ₩ 13  
TheYeonriji Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 116 116  
Ownership [2] 0.10% 0.10%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
Flusys Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 9 9  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
DongSeo Electronics Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 347 347  
Ownership [2] 0.07% 0.07%  
Acquisition Cost [2] ₩ 17 ₩ 17  
Book value [2] 17 17  
Fair value [2] ₩ 17 ₩ 17  
Daewoo Display Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 177 177  
Ownership [2] 0.03% 0.03%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
NTS Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 143 143  
Ownership [2] 0.22% 0.22%  
Acquisition Cost [2] ₩ 36 ₩ 36  
Book value [2] 36 36  
Fair value [2] ₩ 36 ₩ 36  
AID CO., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,212 1,212  
Ownership [2] 0.57% 0.57%  
Acquisition Cost [2] ₩ 36 ₩ 36  
Book value [2] 36 36  
Fair value [2] ₩ 36 ₩ 36  
Changwon Eco-friendly farming corp      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 3 3  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 0 ₩ 0  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Kumo Hitech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 6,697 6,697  
Ownership [2] 0.53% 0.53%  
Acquisition Cost [2] ₩ 100 ₩ 100  
Book value [2] 32 32  
Fair value [2] ₩ 32 ₩ 32  
Kyung Pyo Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 186 186  
Ownership [2] 0.76% 0.76%  
Acquisition Cost [2] ₩ 19 ₩ 19  
Book value [2] 19 19  
Fair value [2] ₩ 19 ₩ 19  
Doosung Heavy Industries Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 53 53  
Ownership [2] 0.06% 0.06%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
Samjoo Hightech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 522 522  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Samkwang Chemical Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 204 204  
Ownership [2] 1.27% 1.27%  
Acquisition Cost [2] ₩ 51 ₩ 51  
Book value [2] 51 51  
Fair value [2] ₩ 51 ₩ 51  
Shinseung Chemical Industy Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 5 5  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 60 ₩ 60  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
KJ Alloy Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 368 368  
Ownership [2] 0.20% 0.20%  
Acquisition Cost [2] ₩ 7 ₩ 7  
Book value [2] 7 7  
Fair value [2] ₩ 7 ₩ 7  
SM Hi-tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 22 22  
Ownership [2] 0.39% 0.39%  
Acquisition Cost [2] ₩ 22 ₩ 22  
Book value [2] 22 22  
Fair value [2] ₩ 22 ₩ 22  
Puruen Environment Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 967 967  
Ownership [2] 1.34% 1.34%  
Acquisition Cost [2] ₩ 19 ₩ 19  
Book value [2] 19 19  
Fair value [2] ₩ 19 ₩ 19  
Miretech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 9,111 9,111  
Ownership [2] 0.27% 0.27%  
Acquisition Cost [2] ₩ 18 ₩ 18  
Book value [2] 18 18  
Fair value [2] ₩ 18 ₩ 18  
Sejin Hightech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 17,980 17,980  
Ownership [2] 0.16% 0.16%  
Acquisition Cost [2] ₩ 18 ₩ 18  
Book value [2] 18 18  
Fair value [2] ₩ 18 ₩ 18  
Eun Sung Enterprise Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,131 1,131  
Ownership [2] 0.72% 0.72%  
Acquisition Cost [2] ₩ 17 ₩ 17  
Book value [2] 17 17  
Fair value [2] ₩ 17 ₩ 17  
Shinyoung Textiles Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 523 523  
Ownership [2] 1.01% 1.01%  
Acquisition Cost [2] ₩ 52 ₩ 52  
Book value [2] 23 23  
Fair value [2] ₩ 23 ₩ 23  
Ilwoo Steel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 41 41  
Ownership [2] 0.28% 0.28%  
Acquisition Cost [2] ₩ 17 ₩ 17  
Book value [2] 17 17  
Fair value [2] ₩ 17 ₩ 17  
Dong-un Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,159 1,159  
Ownership [2] 6.28% 6.28%  
Acquisition Cost [2] ₩ 81 ₩ 81  
Book value [2] 34 34  
Fair value [2] ₩ 34 ₩ 34  
Wongwang Door Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 575 575  
Ownership [2] 1.00% 1.00%  
Acquisition Cost [2] ₩ 29 ₩ 29  
Book value [2] 29 29  
Fair value [2] ₩ 29 ₩ 29  
Mansu Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 344 344  
Ownership [2] 0.25% 0.25%  
Acquisition Cost [2] ₩ 15 ₩ 15  
Book value [2] 15 15  
Fair value [2] ₩ 15 ₩ 15  
Eanskorea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 39 39  
Ownership [2] 0.05% 0.05%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Youngdongseafood Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 165 165  
Ownership [2] 0.33% 0.33%  
Acquisition Cost [2] ₩ 8 ₩ 8  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
Hyunwoo Winstar Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1 1  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 0 ₩ 0  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Sungchang Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 159 159  
Ownership [2] 0.31% 0.31%  
Acquisition Cost [2] ₩ 19 ₩ 19  
Book value [2] 19 19  
Fair value [2] ₩ 19 ₩ 19  
Yuchang Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 90 90  
Ownership [2] 0.11% 0.11%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
Jeongpum Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 322 322  
Ownership [2] 0.35% 0.35%  
Acquisition Cost [2] ₩ 16 ₩ 16  
Book value [2] 16 16  
Fair value [2] ₩ 16 ₩ 16  
Korea Steel Power Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 2,761 2,761  
Ownership [2] 1.88% 1.88%  
Acquisition Cost [2] ₩ 55 ₩ 55  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Amanex Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 10 10  
Ownership [2] 0.02% 0.02%  
Acquisition Cost [2] ₩ 9 ₩ 9  
Book value [2] 9 9  
Fair value [2] ₩ 9 ₩ 9  
Dae-A Leisure Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 23 23  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
Caffe Bene Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,908 1,908  
Ownership [2] 0.03% 0.03%  
Acquisition Cost [2] ₩ 9 ₩ 9  
Book value [2] 9 9  
Fair value [2] ₩ 9 ₩ 9  
Shinjin International Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   4  
Ownership [2]   0.01%  
Acquisition Cost [2]   ₩ 1  
Book value [2]   1  
Fair value [2]   ₩ 1  
Jinhung Packaging Co.,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 4,329 4,329  
Ownership [2] 3.02% 3.02%  
Acquisition Cost [2] ₩ 22 ₩ 22  
Book value [2] 22 22  
Fair value [2] ₩ 22 ₩ 22  
Donglim Eng Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 26 26  
Ownership [2] 0.11% 0.11%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
SIP Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 274 274  
Ownership [2] 0.55% 0.55%  
Acquisition Cost [2] ₩ 7 ₩ 7  
Book value [2] 7 7  
Fair value [2] ₩ 7 ₩ 7  
Clizen Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   615  
Ownership [2]   0.34%  
Acquisition Cost [2]   ₩ 31  
Book value [2]   31  
Fair value [2]   ₩ 31  
Daeji Product Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 15 15  
Ownership [2] 0.05% 0.05%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
SSET Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 181 181  
Ownership [2] 0.30% 0.30%  
Acquisition Cost [2] ₩ 18 ₩ 18  
Book value [2] 18 18  
Fair value [2] ₩ 18 ₩ 18  
Sewon PM Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 963 963  
Ownership [2] 1.11% 1.11%  
Acquisition Cost [2] ₩ 48 ₩ 48  
Book value [2] 48 48  
Fair value [2] ₩ 48 ₩ 48  
Dawon Yuhwa Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 506 506  
Ownership [2] 1.94% 1.94%  
Acquisition Cost [2] ₩ 25 ₩ 25  
Book value [2] 25 25  
Fair value [2] ₩ 25 ₩ 25  
Ogokbaekkwa Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   101  
Ownership [2]   0.12%  
Acquisition Cost [2]   ₩ 1  
Book value [2]   1  
Fair value [2]   ₩ 1  
Ewon materials Co., Ltd. (formerly, Shinwoo Toptech Co., Ltd.)      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 834 834  
Ownership [2] 0.51% 0.51%  
Acquisition Cost [2] ₩ 83 ₩ 83  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
KMLC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 281 281  
Ownership [2] 0.14% 0.14%  
Acquisition Cost [2] ₩ 22 ₩ 22  
Book value [2] 22 22  
Fair value [2] ₩ 22 ₩ 22  
Seinfood Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 13 13  
Ownership [2] 0.17% 0.17%  
Acquisition Cost [2] ₩ 7 ₩ 7  
Book value [2] 7 7  
Fair value [2] ₩ 7 ₩ 7  
TaeSung Eco-Tech. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,368 1,368  
Ownership [2] 4.55% 4.55%  
Acquisition Cost [2] ₩ 34 ₩ 34  
Book value [2] 34 34  
Fair value [2] ₩ 34 ₩ 34  
Kukex Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 639 639  
Ownership [2] 0.05% 0.05%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Youngshin Plus Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 104 104  
Ownership [2] 0.12% 0.12%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
Chang won Engineering Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 22 22  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
Samsung Silup Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 47 47  
Ownership [2] 0.19% 0.19%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
Samwon Bio Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 390 390  
Ownership [2] 0.25% 0.25%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
IZU KOREA Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 48 48  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Dongdo CNP Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 234 234  
Ownership [2] 0.36% 0.36%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
Dae Bang Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   115  
Ownership [2]   0.13%  
Acquisition Cost [2]   ₩ 6  
Book value [2]   6  
Fair value [2]   ₩ 6  
S.I.T. Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 2,213 2,213  
Ownership [2] 0.44% 0.44%  
Acquisition Cost [2] ₩ 22 ₩ 22  
Book value [2] 22 22  
Fair value [2] ₩ 22 ₩ 22  
Taejin Hiech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 78 78  
Ownership [2] 0.26% 0.26%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Headone Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 69 69  
Ownership [2] 0.12% 0.12%  
Acquisition Cost [2] ₩ 7 ₩ 7  
Book value [2] 7 7  
Fair value [2] ₩ 7 ₩ 7  
E-Won Solutech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 158 158  
Ownership [2] 0.16% 0.16%  
Acquisition Cost [2] ₩ 40 ₩ 40  
Book value [2] 40 40  
Fair value [2] ₩ 40 ₩ 40  
KPL Circuit Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 283 283  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 14 ₩ 14  
Book value [2] 14 14  
Fair value [2] ₩ 14 ₩ 14  
Road Solar Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 12 12  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 0 ₩ 0  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Han Mi Flexible Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 143 143  
Ownership [2] 0.20% 0.20%  
Acquisition Cost [2] ₩ 43 ₩ 43  
Book value [2] 43 43  
Fair value [2] ₩ 43 ₩ 43  
Millennium PNT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 227 227  
Ownership [2] 0.37% 0.37%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
GN Chem Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   40  
Ownership [2]   0.07%  
Acquisition Cost [2]   ₩ 1  
Book value [2]   1  
Fair value [2]   ₩ 1  
Dae Myung Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 114 114  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Nanomicart Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   176  
Ownership [2]   1.06%  
Acquisition Cost [2]   ₩ 35  
Book value [2]   35  
Fair value [2]   ₩ 35  
Young San Heavy Industries Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 74 74  
Ownership [2] 0.11% 0.11%  
Acquisition Cost [2] ₩ 7 ₩ 7  
Book value [2] 7 7  
Fair value [2] ₩ 7 ₩ 7  
Samchungwon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 15 15  
Ownership [2] 0.24% 0.24%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Wooyang Frozen Foods Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 66 66  
Ownership [2] 0.82% 0.82%  
Acquisition Cost [2] ₩ 27 ₩ 27  
Book value [2] 27 27  
Fair value [2] ₩ 27 ₩ 27  
Nanomic Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 94 94  
Ownership [2] 0.63% 0.63%  
Acquisition Cost [2] ₩ 38 ₩ 38  
Book value [2] 38 38  
Fair value [2] ₩ 38 ₩ 38  
Samsung Nonferrous Metal Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 89 89  
Ownership [2] 0.26% 0.26%  
Acquisition Cost [2] ₩ 9 ₩ 9  
Book value [2] 9 9  
Fair value [2] ₩ 9 ₩ 9  
Daewha Fuel Pump Ind., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 83 83  
Ownership [2] 0.05% 0.05%  
Acquisition Cost [2] ₩ 10 ₩ 10  
Book value [2] 10 10  
Fair value [2] ₩ 10 ₩ 10  
Addies Direct Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   1  
Ownership [2]   0.00%  
Acquisition Cost [2]   ₩ 0  
Book value [2]   0  
Fair value [2]   ₩ 0  
WorldCnM Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 131 131  
Ownership [2] 1.09% 1.09%  
Acquisition Cost [2] ₩ 10 ₩ 10  
Book value [2] 10 10  
Fair value [2] ₩ 10 ₩ 10  
Superone Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,585 1,585  
Ownership [2] 1.45% 1.45%  
Acquisition Cost [2] ₩ 8 ₩ 8  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
Buyoung Panji Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 478 478  
Ownership [2] 0.44% 0.44%  
Acquisition Cost [2] ₩ 12 ₩ 12  
Book value [2] 12 12  
Fair value [2] ₩ 12 ₩ 12  
International Paint Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 111 111  
Ownership [2] 0.48% 0.48%  
Acquisition Cost [2] ₩ 11 ₩ 11  
Book value [2] 11 11  
Fair value [2] ₩ 11 ₩ 11  
EI Lighting Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 358 358  
Ownership [2] 0.36% 0.36%  
Acquisition Cost [2] ₩ 18 ₩ 18  
Book value [2] 18 18  
Fair value [2] ₩ 18 ₩ 18  
Hightech Mnp Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   123  
Ownership [2]   0.35%  
Acquisition Cost [2]   ₩ 6  
Book value [2]   6  
Fair value [2]   ₩ 6  
Yooseung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 10 10  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Sungkwang Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 48 48  
Ownership [2] 0.35% 0.35%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Taeyang gasteel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   8  
Ownership [2]   0.02%  
Acquisition Cost [2]   ₩ 1  
Book value [2]   1  
Fair value [2]   ₩ 1  
Ajin KSB Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 204 204  
Ownership [2] 0.31% 0.31%  
Acquisition Cost [2] ₩ 18 ₩ 18  
Book value [2] 18 18  
Fair value [2] ₩ 18 ₩ 18  
Sewon Ceramic Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 530 530  
Ownership [2] 1.01% 1.01%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
Choyang Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 465 465  
Ownership [2] 1.01% 1.01%  
Acquisition Cost [2] ₩ 23 ₩ 23  
Book value [2] 23 23  
Fair value [2] ₩ 23 ₩ 23  
TK Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 307 307  
Ownership [2] 0.70% 0.70%  
Acquisition Cost [2] ₩ 15 ₩ 15  
Book value [2] 15 15  
Fair value [2] ₩ 15 ₩ 15  
Arari Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 14 14  
Ownership [2] 0.05% 0.05%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
C&S Corporation Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,304 1,304  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 13 ₩ 13  
Book value [2] 13 13  
Fair value [2] ₩ 13 ₩ 13  
Global The One of Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 62 62  
Ownership [2] 0.06% 0.06%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Steellife Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 85 85  
Ownership [2] 0.06% 0.06%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
D&C Castech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   330  
Ownership [2]   1.89%  
Acquisition Cost [2]   ₩ 25  
Book value [2]   25  
Fair value [2]   ₩ 25  
Geumhan Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 498 498  
Ownership [2] 0.24% 0.24%  
Acquisition Cost [2] ₩ 7 ₩ 7  
Book value [2] 7 7  
Fair value [2] ₩ 7 ₩ 7  
Mokgan Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 5 5  
Ownership [2] 0.02% 0.02%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Wenex Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 373 373  
Ownership [2] 0.53% 0.53%  
Acquisition Cost [2] ₩ 19 ₩ 19  
Book value [2] 19 19  
Fair value [2] ₩ 19 ₩ 19  
Sulim Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 30 30  
Ownership [2] 0.20% 0.20%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
Shinkwang Engineering      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 24 24  
Ownership [2] 0.36% 0.36%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Ek Cookware Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 60 60  
Ownership [2] 0.04% 0.04%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
KTTW Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 28 28  
Ownership [2] 0.05% 0.05%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Avajar Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,061 1,061  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Woosung I.B. Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 7,071 7,071  
Ownership [2] 0.07% 0.07%  
Acquisition Cost [2] ₩ 14 ₩ 14  
Book value [2] 14 14  
Fair value [2] ₩ 14 ₩ 14  
CAP Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 16 16  
Ownership [2] 0.30% 0.30%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
MSM Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 25 25  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 0 ₩ 0  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Ddpopstyle Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 22 22  
Ownership [2] 0.14% 0.14%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Finemetal Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 49 49  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Sungkyeong Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 52 52  
Ownership [2] 0.24% 0.24%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Newko Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 331 331  
Ownership [2] 0.06% 0.06%  
Acquisition Cost [2] ₩ 10 ₩ 10  
Book value [2] 10 10  
Fair value [2] ₩ 10 ₩ 10  
Dongsung Mulsan Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 137 137  
Ownership [2] 0.34% 0.34%  
Acquisition Cost [2] ₩ 14 ₩ 14  
Book value [2] 14 14  
Fair value [2] ₩ 14 ₩ 14  
Pizzakorea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 42 42  
Ownership [2] 0.18% 0.18%  
Acquisition Cost [2] ₩ 9 ₩ 9  
Book value [2] 9 9  
Fair value [2] ₩ 9 ₩ 9  
Geumdani Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 2,377 2,377  
Ownership [2] 1.82% 1.82%  
Acquisition Cost [2] ₩ 36 ₩ 36  
Book value [2] 36 36  
Fair value [2] ₩ 36 ₩ 36  
Mezzanine I-pack Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 38 38  
Ownership [2] 0.02% 0.02%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Ltop Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 36 36  
Ownership [2] 0.06% 0.06%  
Acquisition Cost [2] ₩ 7 ₩ 7  
Book value [2] 7 7  
Fair value [2] ₩ 7 ₩ 7  
Simile Aluminium Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 428 428  
Ownership [2] 0.31% 0.31%  
Acquisition Cost [2] ₩ 9 ₩ 9  
Book value [2] 9 9  
Fair value [2] ₩ 9 ₩ 9  
GT Tooling Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 604 604  
Ownership [2] 0.17% 0.17%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
Team Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 4,782 4,782  
Ownership [2] 0.37% 0.37%  
Acquisition Cost [2] ₩ 24 ₩ 24  
Book value [2] 24 24  
Fair value [2] ₩ 24 ₩ 24  
Donghwa TCA Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,012 1,012  
Ownership [2] 0.30% 0.30%  
Acquisition Cost [2] ₩ 25 ₩ 25  
Book value [2] 25 25  
Fair value [2] ₩ 25 ₩ 25  
Hankook Piaget Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 4 4  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Coco Food Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 648 648  
Ownership [2] 1.24% 1.24%  
Acquisition Cost [2] ₩ 33 ₩ 33  
Book value [2] 33 33  
Fair value [2] ₩ 33 ₩ 33  
Woori Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 102 102  
Ownership [2] 1.05% 1.05%  
Acquisition Cost [2] ₩ 21 ₩ 21  
Book value [2] 21 21  
Fair value [2] ₩ 21 ₩ 21  
Ssangyong Youngweol Plant Service&Engineering Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 83 83  
Ownership [2] 0.07% 0.07%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
SH Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 39 39  
Ownership [2] 0.20% 0.20%  
Acquisition Cost [2] ₩ 8 ₩ 8  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
Daeyoung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 75 75  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 8 ₩ 8  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
Chandown Food Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   46  
Ownership [2]   0.14%  
Acquisition Cost [2]   ₩ 9  
Book value [2]   9  
Fair value [2]   ₩ 9  
Getron Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 7,259 7,259  
Ownership [2] 0.20% 0.20%  
Acquisition Cost [2] ₩ 37 ₩ 37  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
Jungmun Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 19 19  
Ownership [2] 0.26% 0.26%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
JM Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 403 403  
Ownership [2] 0.67% 0.67%  
Acquisition Cost [2] ₩ 82 ₩ 82  
Book value [2] 10 10  
Fair value [2] ₩ 10 ₩ 10  
SGC Energy Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 580,000 580,000  
Ownership [2] 5.00% 5.00%  
Acquisition Cost [2] ₩ 2,900 ₩ 2,900  
Book value [2] 6,249 7,856  
Fair value [2] ₩ 6,249 ₩ 7,856  
Le Soleil KHNP LLC      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 137,600 137,600  
Ownership [2] 19.00% 19.00%  
Acquisition Cost [2] ₩ 1,376 ₩ 1,376  
Book value [2] 1,376 1,376  
Fair value [2] ₩ 1,376 ₩ 1,376  
Ihsung CNI Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 127,660 127,660  
Ownership [2] 4.30% 4.30%  
Acquisition Cost [2] ₩ 1,500 ₩ 1,500  
Book value [2] 1,937 2,016  
Fair value [2] ₩ 1,937 ₩ 2,016  
H Robotics Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 903,601 903,601  
Ownership [2] 8.05% 8.05%  
Acquisition Cost [2] ₩ 4,000 ₩ 4,000  
Book value [2] 5,639 5,638  
Fair value [2] ₩ 5,639 ₩ 5,638  
Good Tcells Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 11,364 11,364  
Ownership [2] 0.33% 0.34%  
Acquisition Cost [2] ₩ 500 ₩ 500  
Book value [2] 399 347  
Fair value [2] ₩ 399 ₩ 347  
IPS Bio Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,975 1,975  
Ownership [2] 3.13% 3.13%  
Acquisition Cost [2] ₩ 1,000 ₩ 1,000  
Book value [2] 897 843  
Fair value [2] ₩ 897 ₩ 843  
Nine B Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 5,000 5,000  
Ownership [2] 4.96% 4.96%  
Acquisition Cost [2] ₩ 1,000 ₩ 1,000  
Book value [2] 1,000 1,000  
Fair value [2] ₩ 1,000 ₩ 1,000  
Choigang-gujo Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 61 61  
Ownership [2] 0.45% 0.45%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Youngheung Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   101  
Ownership [2]   0.05%  
Acquisition Cost [2]   ₩ 5  
Book value [2]   1  
Fair value [2]   ₩ 1  
Hosungsteel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 323 323  
Ownership [2] 0.26% 0.26%  
Acquisition Cost [2] ₩ 14 ₩ 14  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Uktae IND. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 140 140  
Ownership [2] 0.12% 0.12%  
Acquisition Cost [2] ₩ 7 ₩ 7  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
JFC Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 16 16  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Hyundai Tech Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 28 28  
Ownership [2] 0.69% 0.69%  
Acquisition Cost [2] ₩ 10 ₩ 10  
Book value [2] 10 10  
Fair value [2] ₩ 10 ₩ 10  
Daeil Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 301 301  
Ownership [2] 0.42% 0.42%  
Acquisition Cost [2] ₩ 15 ₩ 15  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Seohan Food Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   83  
Ownership [2]   0.19%  
Acquisition Cost [2]   ₩ 2  
Book value [2]   2  
Fair value [2]   ₩ 2  
Daehyeon Recycle Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 59 59  
Ownership [2] 0.61% 0.61%  
Acquisition Cost [2] ₩ 12 ₩ 12  
Book value [2] 12 12  
Fair value [2] ₩ 12 ₩ 12  
Metal Link Inc. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 709 709  
Ownership [2] 0.17% 0.17%  
Acquisition Cost [2] ₩ 35 ₩ 35  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
Pipetec Korea Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 50 50  
Ownership [2] 0.07% 0.07%  
Acquisition Cost [2] ₩ 10 ₩ 10  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
SungJin Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 803 803  
Ownership [2] 1.20% 1.20%  
Acquisition Cost [2] ₩ 24 ₩ 24  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
Yujin E&C Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 29 29  
Ownership [2] 0.18% 0.18%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Daishin Logistics Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 13 13  
Ownership [2] 0.09% 0.09%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
JinSung Engineering Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 18 18  
Ownership [2] 0.30% 0.30%  
Acquisition Cost [2] ₩ 18 ₩ 18  
Book value [2] 18 18  
Fair value [2] ₩ 18 ₩ 18  
Yongho Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 157 157  
Ownership [2] 0.22% 0.22%  
Acquisition Cost [2] ₩ 32 ₩ 32  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Wow tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 369 369  
Ownership [2] 0.75% 0.75%  
Acquisition Cost [2] ₩ 11 ₩ 11  
Book value [2] 11 11  
Fair value [2] ₩ 11 ₩ 11  
World Power Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 16 16  
Ownership [2] 0.28% 0.28%  
Acquisition Cost [2] ₩ 24 ₩ 24  
Book value [2] 24 24  
Fair value [2] ₩ 24 ₩ 24  
PBM Auto Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,001 1,001  
Ownership [2] 1.06% 1.06%  
Acquisition Cost [2] ₩ 10 ₩ 10  
Book value [2] 10 10  
Fair value [2] ₩ 10 ₩ 10  
K2 Motors Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 54 54  
Ownership [2] 0.28% 0.28%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
CL Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 801 801  
Ownership [2] 2.25% 2.25%  
Acquisition Cost [2] ₩ 40 ₩ 40  
Book value [2] 40 40  
Fair value [2] ₩ 40 ₩ 40  
Mirae Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 39 39  
Ownership [2] 0.04% 0.04%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
Gentak Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 301 301  
Ownership [2] 0.31% 0.31%  
Acquisition Cost [2] ₩ 8 ₩ 8  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
Sungjin Chemical Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 118 118  
Ownership [2] 0.36% 0.36%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
LMAT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 198 198  
Ownership [2] 0.04% 0.04%  
Acquisition Cost [2] ₩ 20 ₩ 20  
Book value [2] 20 20  
Fair value [2] ₩ 20 ₩ 20  
Poong Lim Industrial Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 25 25  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 38 ₩ 38  
Book value [2] 38 38  
Fair value [2] ₩ 38 ₩ 38  
Dae Sung GeoTech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 631 631  
Ownership [2] 1.28% 1.28%  
Acquisition Cost [2] ₩ 32 ₩ 32  
Book value [2] 32 32  
Fair value [2] ₩ 32 ₩ 32  
Saeheemang Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 756 756  
Ownership [2] 0.60% 0.60%  
Acquisition Cost [2] ₩ 15 ₩ 15  
Book value [2] 15 15  
Fair value [2] ₩ 15 ₩ 15  
Hakbong Precision Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   1,460  
Ownership [2]   1.18%  
Acquisition Cost [2]   ₩ 15  
Book value [2]   15  
Fair value [2]   ₩ 15  
Vornech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 431 431  
Ownership [2] 0.37% 0.37%  
Acquisition Cost [2] ₩ 11 ₩ 11  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Woojin Formtech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 76 76  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 8 ₩ 8  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Korea Engineer Manufacturing Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 114 114  
Ownership [2] 0.26% 0.26%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Sinwa J&K Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 476 476  
Ownership [2] 0.28% 0.28%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
Owon E&G Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 132 132  
Ownership [2] 0.20% 0.20%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
Guseong Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 141 141  
Ownership [2] 0.20% 0.20%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Irefarm Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 45 45  
Ownership [2] 0.30% 0.30%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Nam-hae E&C Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   117  
Ownership [2]   0.10%  
Acquisition Cost [2]   ₩ 2  
Book value [2]   2  
Fair value [2]   ₩ 2  
Haenarae Agricultural Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 15 15  
Ownership [2] 0.03% 0.03%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
DECO&E Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,261 1,261  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Design Beyond Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 17 17  
Ownership [2] 0.19% 0.19%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
LBK Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 8 8  
Ownership [2] 0.05% 0.05%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Duckwon industrial Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 32 32  
Ownership [2] 0.43% 0.43%  
Acquisition Cost [2] ₩ 13 ₩ 13  
Book value [2] 13 13  
Fair value [2] ₩ 13 ₩ 13  
ASPT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 64 64  
Ownership [2] 0.82% 0.82%  
Acquisition Cost [2] ₩ 19 ₩ 19  
Book value [2] 19 19  
Fair value [2] ₩ 19 ₩ 19  
SIMA Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 29 29  
Ownership [2] 0.05% 0.05%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Jingkang Resources Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 90 90  
Ownership [2] 1.57% 1.57%  
Acquisition Cost [2] ₩ 13 ₩ 13  
Book value [2] 13 13  
Fair value [2] ₩ 13 ₩ 13  
Eslin Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 39 39  
Ownership [2] 0.14% 0.14%  
Acquisition Cost [2] ₩ 8 ₩ 8  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
Shinwon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   275  
Ownership [2]   0.42%  
Acquisition Cost [2]   ₩ 19  
Book value [2]   19  
Fair value [2]   ₩ 19  
CIC Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 96 96  
Ownership [2] 0.54% 0.54%  
Acquisition Cost [2] ₩ 10 ₩ 10  
Book value [2] 10 10  
Fair value [2] ₩ 10 ₩ 10  
Orano Expansion      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 5,742,405 5,742,405  
Ownership [2] 4.72% 4.72%  
Acquisition Cost [2] ₩ 0 ₩ 0  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Fourever Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 44 44  
Ownership [2] 0.10% 0.10%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
Myungil Metal Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 80 80  
Ownership [2] 0.10% 0.10%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
Daeshin ECM Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 182 182  
Ownership [2] 0.30% 0.30%  
Acquisition Cost [2] ₩ 9 ₩ 9  
Book value [2] 9 9  
Fair value [2] ₩ 9 ₩ 9  
Greencarbon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 79 79  
Ownership [2] 0.06% 0.06%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Sunkoo Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 4 4  
Ownership [2] 0.10% 0.10%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Jians Construction Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 45 45  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
DH trading Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 891 891  
Ownership [2] 0.04% 0.04%  
Acquisition Cost [2] ₩ 178 ₩ 178  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Sangsin Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 29 29  
Ownership [2] 0.09% 0.09%  
Acquisition Cost [2] ₩ 15 ₩ 15  
Book value [2] 15 15  
Fair value [2] ₩ 15 ₩ 15  
Steel focus Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 154 154  
Ownership [2] 0.20% 0.20%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
Kamada Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 437 437  
Ownership [2] 0.33% 0.33%  
Acquisition Cost [2] ₩ 22 ₩ 22  
Book value [2] 22 22  
Fair value [2] ₩ 22 ₩ 22  
Fosys Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 19 19  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
GB precision Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 137 137  
Ownership [2] 0.57% 0.57%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Ewon Art Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 185 185  
Ownership [2] 0.61% 0.61%  
Acquisition Cost [2] ₩ 9 ₩ 9  
Book value [2] 9 9  
Fair value [2] ₩ 9 ₩ 9  
DI Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 3 3  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 0 ₩ 0  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Hans AD Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 33 33  
Ownership [2] 0.35% 0.35%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Chaegim Environment Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 158 158  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Daesung Stain Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 32 32  
Ownership [2] 0.32% 0.32%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
YSM Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 281 281  
Ownership [2] 2.07% 2.07%  
Acquisition Cost [2] ₩ 14 ₩ 14  
Book value [2] 14 14  
Fair value [2] ₩ 14 ₩ 14  
Dong In Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   65  
Ownership [2]   0.13%  
Acquisition Cost [2]   ₩ 3  
Book value [2]   3  
Fair value [2]   ₩ 3  
U&I Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 50 50  
Ownership [2] 0.22% 0.22%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
World One Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 401 401  
Ownership [2] 0.58% 0.58%  
Acquisition Cost [2] ₩ 10 ₩ 10  
Book value [2] 10 10  
Fair value [2] ₩ 10 ₩ 10  
Yewon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 24 24  
Ownership [2] 0.02% 0.02%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
TSNT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 119 119  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 24 ₩ 24  
Book value [2] 24 24  
Fair value [2] ₩ 24 ₩ 24  
Shinsung Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 314 314  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 16 ₩ 16  
Book value [2] 16 16  
Fair value [2] ₩ 16 ₩ 16  
Loft Garden Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1 1  
Ownership [2] 0.04% 0.04%  
Acquisition Cost [2] ₩ 0 ₩ 0  
Book value [2] 0 0  
Fair value [2] ₩ 0 ₩ 0  
Handon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 74 74  
Ownership [2] 0.25% 0.25%  
Acquisition Cost [2] ₩ 11 ₩ 11  
Book value [2] 11 11  
Fair value [2] ₩ 11 ₩ 11  
GH Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 82 82  
Ownership [2] 0.22% 0.22%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Daeo Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 13 13  
Ownership [2] 0.23% 0.23%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
Bokwang Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 76 76  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 15 ₩ 15  
Book value [2] 15 15  
Fair value [2] ₩ 15 ₩ 15  
Samkum Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 201 201  
Ownership [2] 0.48% 0.48%  
Acquisition Cost [2] ₩ 40 ₩ 40  
Book value [2] 40 40  
Fair value [2] ₩ 40 ₩ 40  
Dyntex Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 75 75  
Ownership [2] 0.28% 0.28%  
Acquisition Cost [2] ₩ 15 ₩ 15  
Book value [2] 15 15  
Fair value [2] ₩ 15 ₩ 15  
Mirae Engineering Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 66 66  
Ownership [2] 0.15% 0.15%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Mideumeul-juneun-namu Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   119  
Ownership [2]   0.53%  
Acquisition Cost [2]   ₩ 6  
Book value [2]   6  
Fair value [2]   ₩ 6  
Ilshin Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 36 36  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 7 ₩ 7  
Book value [2] 7 7  
Fair value [2] ₩ 7 ₩ 7  
Magtec Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   28  
Ownership [2]   0.00%  
Acquisition Cost [2]   ₩ 6  
Book value [2]   6  
Fair value [2]   ₩ 6  
Sukwon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 2,885 2,885  
Ownership [2] 0.59% 0.59%  
Acquisition Cost [2] ₩ 29 ₩ 29  
Book value [2] 29 29  
Fair value [2] ₩ 29 ₩ 29  
Hae-sung Metal Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 159 159  
Ownership [2] 0.17% 0.17%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
White&Clean Foods Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 330 330  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Michang Cable Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,096 1,096  
Ownership [2] 0.13% 0.26%  
Acquisition Cost [2] ₩ 16 ₩ 16  
Book value [2] 16 16  
Fair value [2] ₩ 16 ₩ 16  
G.M Foods Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 57 57  
Ownership [2] 0.16% 0.16%  
Acquisition Cost [2] ₩ 9 ₩ 9  
Book value [2] 9 9  
Fair value [2] ₩ 9 ₩ 9  
Wecan Global Inc. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 165 165  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 8 ₩ 8  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
Daeju Steel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 11 11  
Ownership [2] 0.20% 0.20%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Hyundai Glass Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 860 860  
Ownership [2] 0.83% 0.83%  
Acquisition Cost [2] ₩ 43 ₩ 43  
Book value [2] 43 43  
Fair value [2] ₩ 43 ₩ 43  
MEC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 16,468 16,468  
Ownership [2] 1.17% 1.17%  
Acquisition Cost [2] ₩ 41 ₩ 41  
Book value [2] 41 41  
Fair value [2] ₩ 41 ₩ 41  
Daeyeoneco Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 151 151  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 15 ₩ 15  
Book value [2] 15 15  
Fair value [2] ₩ 15 ₩ 15  
Hyesung Cable&Communication Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 762 762  
Ownership [2] 0.39% 0.39%  
Acquisition Cost [2] ₩ 38 ₩ 38  
Book value [2] 38 38  
Fair value [2] ₩ 38 ₩ 38  
Sangjin Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 428 428  
Ownership [2] 0.35% 0.35%  
Acquisition Cost [2] ₩ 21 ₩ 21  
Book value [2] 21 21  
Fair value [2] ₩ 21 ₩ 21  
Topis Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 246 246  
Ownership [2] 0.71% 0.71%  
Acquisition Cost [2] ₩ 14 ₩ 14  
Book value [2] 14 14  
Fair value [2] ₩ 14 ₩ 14  
G & L Tech Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   2  
Ownership [2]   0.06%  
Acquisition Cost [2]   ₩ 0  
Book value [2]   0  
Fair value [2]   ₩ 0  
Cheonhae Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   72  
Ownership [2]   0.00%  
Acquisition Cost [2]   ₩ 2  
Book value [2]   2  
Fair value [2]   ₩ 2  
Iksan-guwon Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 563 563  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 11 ₩ 11  
Book value [2] 11 11  
Fair value [2] ₩ 11 ₩ 11  
Korea Remicon Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 36 36  
Ownership [2] 0.03% 0.03%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
New Tech Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 23 23  
Ownership [2] 0.15% 0.15%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Segeon Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 124 124  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
MS Tech Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 9 9  
Ownership [2] 0.15% 0.15%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
J.I Steel Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 21 21  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
HNT Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 172 172  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 9 ₩ 9  
Book value [2] 9 9  
Fair value [2] ₩ 9 ₩ 9  
Taejin Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 27 27  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Macroad Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 953 953  
Ownership [2] 0.17% 0.17%  
Acquisition Cost [2] ₩ 10 ₩ 10  
Book value [2] 10 10  
Fair value [2] ₩ 10 ₩ 10  
Woongjin Energy Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 94 94  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 9 ₩ 9  
Book value [2] 9 9  
Fair value [2] ₩ 9 ₩ 9  
Electric Contractors' Financial Cooperative Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   0  
Ownership [2]   0.00%  
Acquisition Cost [2]   ₩ 39  
Book value [2]   39  
Fair value [2]   ₩ 39  
Information&Communication Financial Cooperative Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   0  
Ownership [2]   0.00%  
Acquisition Cost [2]   ₩ 15  
Book value [2]   15  
Fair value [2]   ₩ 15  
Common Computer Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 3,856 3,856  
Ownership [2] 1.64% 1.87%  
Acquisition Cost [2] ₩ 1,000 ₩ 1,000  
Book value [2] 1,154 1,000  
Fair value [2] ₩ 1,154 ₩ 1,000  
Fine Powerex Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 72,633 72,633  
Ownership [2] 4.58% 4.92%  
Acquisition Cost [2] ₩ 1,500 ₩ 1,500  
Book value [2] 1,772 1,500  
Fair value [2] ₩ 1,772 ₩ 1,500  
Eunsung Industrial Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 3 3  
Ownership [2] 0.03% 0.03%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
KPE Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 51 51  
Ownership [2] 0.19% 0.19%  
Acquisition Cost [2] ₩ 13 ₩ 13  
Book value [2] 13 13  
Fair value [2] ₩ 13 ₩ 13  
Dongbangfarms Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 904 904  
Ownership [2] 0.55% 0.55%  
Acquisition Cost [2] ₩ 41 ₩ 41  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
Sungdo Pack Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 15 15  
Ownership [2] 0.06% 0.06%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Coffeenie Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 2 2  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Medi Pharma Plan Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,075 1,075  
Ownership [2] 0.26% 0.26%  
Acquisition Cost [2] ₩ 108 ₩ 108  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
Woori Ascon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 25 25  
Ownership [2] 0.34% 0.34%  
Acquisition Cost [2] ₩ 10 ₩ 10  
Book value [2] 10 10  
Fair value [2] ₩ 10 ₩ 10  
Dong Shin Hydraulies Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 9,460 9,460  
Ownership [2] 0.14% 0.14%  
Acquisition Cost [2] ₩ 47 ₩ 47  
Book value [2] 47 47  
Fair value [2] ₩ 47 ₩ 47  
Cheonwoo E.P.S Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 371 371  
Ownership [2] 1.10% 1.10%  
Acquisition Cost [2] ₩ 19 ₩ 19  
Book value [2] 19 19  
Fair value [2] ₩ 19 ₩ 19  
Koa Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,244 1,244  
Ownership [2] 0.77% 0.77%  
Acquisition Cost [2] ₩ 12 ₩ 12  
Book value [2] 12 12  
Fair value [2] ₩ 12 ₩ 12  
Jinwoo Textile Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   91  
Ownership [2]   0.68%  
Acquisition Cost [2]   ₩ 9  
Book value [2]   9  
Fair value [2]   ₩ 9  
SKE Cable Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 120 120  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 6 ₩ 6  
Book value [2] 6 6  
Fair value [2] ₩ 6 ₩ 6  
Hi Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,845 1,845  
Ownership [2] 1.94% 1.94%  
Acquisition Cost [2] ₩ 185 ₩ 185  
Book value [2] 185 185  
Fair value [2] ₩ 185 ₩ 185  
Daeheung Engineering Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 65 65  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Etapol Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,361 1,361  
Ownership [2] 0.54% 0.54%  
Acquisition Cost [2] ₩ 41 ₩ 41  
Book value [2] 41 41  
Fair value [2] ₩ 41 ₩ 41  
Yoongwon Korea Co., Ltd. (formerly, Yoongwon International Co., Ltd.)      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 157 157  
Ownership [2] 1.47% 1.47%  
Acquisition Cost [2] ₩ 31 ₩ 31  
Book value [2] 31 31  
Fair value [2] ₩ 31 ₩ 31  
Avoh CeramicBath Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 173 173  
Ownership [2] 0.14% 0.14%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
Dongyang R.P.F. Industrial Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 59 59  
Ownership [2] 0.03% 0.03%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Yuil Engineering Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 14 14  
Ownership [2] 0.03% 0.03%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Taesan Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 146 146  
Ownership [2] 0.69% 0.69%  
Acquisition Cost [2] ₩ 35 ₩ 35  
Book value [2] 35 35  
Fair value [2] ₩ 35 ₩ 35  
Jico Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   10,581  
Ownership [2]   0.01%  
Acquisition Cost [2]   ₩ 26  
Book value [2]   26  
Fair value [2]   ₩ 26  
K Shipbuilding Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   8,622  
Ownership [2]   0.25%  
Acquisition Cost [2]   ₩ 1,078  
Book value [2]   1,078  
Fair value [2]   ₩ 1,078  
Seokjin E&T Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 81 81  
Ownership [2] 0.06% 0.06%  
Acquisition Cost [2] ₩ 8 ₩ 8  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
Agencore Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 175,779 104,350  
Ownership [2] 8.32% 5.67%  
Acquisition Cost [2] ₩ 2,200 ₩ 1,200  
Book value [2] 2,200 1,200  
Fair value [2] ₩ 2,200 ₩ 1,200  
SamHong Machinery. EMC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 476,192 476,192  
Ownership [2] 8.98% 19.23%  
Acquisition Cost [2] ₩ 5,000 ₩ 5,000  
Book value [2] 5,000 5,000  
Fair value [2] ₩ 5,000 ₩ 5,000  
Thermo Tec Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 446 446  
Ownership [2] 0.03% 0.03%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
DaeYang Hydro Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 6 6  
Ownership [2] 0.02% 0.02%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
SangMoo Steel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 24 24  
Ownership [2] 0.04% 0.04%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Jungin Distribution Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 17 17  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
TheSun Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 77 77  
Ownership [2] 0.06% 0.06%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Daedong Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   176  
Ownership [2]   0.33%  
Acquisition Cost [2]   ₩ 18  
Book value [2]   18  
Fair value [2]   ₩ 18  
Daewoong and Technology Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 423 423  
Ownership [2] 1.14% 1.14%  
Acquisition Cost [2] ₩ 42 ₩ 42  
Book value [2] 42 42  
Fair value [2] ₩ 42 ₩ 42  
Ebadom Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   361  
Ownership [2]   0.21%  
Acquisition Cost [2]   ₩ 58  
Book value [2]   58  
Fair value [2]   ₩ 58  
ChoungHwa Precise Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 428 428  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 43 ₩ 43  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
Snopa Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 458 458  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 5 ₩ 5  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
Aloha Factory Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 2,970 2,970  
Ownership [2] 3.70% 3.61%  
Acquisition Cost [2] ₩ 1,000 ₩ 1,000  
Book value [2] 739 1,000  
Fair value [2] ₩ 739 ₩ 1,000  
Dailyshot Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,695 339  
Ownership [2] 1.85% 1.85%  
Acquisition Cost [2] ₩ 1,001 ₩ 1,001  
Book value [2] 1,001 1,001  
Fair value [2] ₩ 1,001 ₩ 1,001  
Mediquitous Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   5,080  
Ownership [2]   0.69%  
Acquisition Cost [2]   ₩ 1,250  
Book value [2]   1,250  
Fair value [2]   ₩ 1,250  
SKD Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   40  
Ownership [2]   0.28%  
Acquisition Cost [2]   ₩ 20  
Book value [2]   20  
Fair value [2]   ₩ 20  
Samhyup Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 376 376  
Ownership [2] 0.91% 0.91%  
Acquisition Cost [2] ₩ 38 ₩ 38  
Book value [2] 38 38  
Fair value [2] ₩ 38 ₩ 38  
Gogang Aluminum Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 828 828  
Ownership [2] 1.52% 1.52%  
Acquisition Cost [2] ₩ 41 ₩ 41  
Book value [2] 41 41  
Fair value [2] ₩ 41 ₩ 41  
Taekwang Paper Board Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 133 133  
Ownership [2] 0.49% 0.49%  
Acquisition Cost [2] ₩ 23 ₩ 23  
Book value [2] 23 23  
Fair value [2] ₩ 23 ₩ 23  
NY Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 33 33  
Ownership [2] 0.15% 0.15%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Sekwang Precision Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   394  
Ownership [2]   0.84%  
Acquisition Cost [2]   ₩ 79  
Book value [2]   79  
Fair value [2]   ₩ 79  
Dongbang Metal Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,985 1,985  
Ownership [2] 0.32% 0.32%  
Acquisition Cost [2] ₩ 20 ₩ 20  
Book value [2] 20 20  
Fair value [2] ₩ 20 ₩ 20  
Samwang Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 170 170  
Ownership [2] 0.25% 0.25%  
Acquisition Cost [2] ₩ 17 ₩ 17  
Book value [2] 17 17  
Fair value [2] ₩ 17 ₩ 17  
Yurim CNF Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 15 15  
Ownership [2] 0.23% 0.23%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
Guseul Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 89 89  
Ownership [2] 0.23% 0.23%  
Acquisition Cost [2] ₩ 9 ₩ 9  
Book value [2] 9 9  
Fair value [2] ₩ 9 ₩ 9  
Gaone International Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 54 54  
Ownership [2] 0.29% 0.29%  
Acquisition Cost [2] ₩ 14 ₩ 14  
Book value [2] 14 14  
Fair value [2] ₩ 14 ₩ 14  
Daekwang Forging Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   1,298  
Ownership [2]   1.99%  
Acquisition Cost [2]   ₩ 130  
Book value [2]   130  
Fair value [2]   ₩ 130  
Dongyang Pratech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 265 265  
Ownership [2] 1.21% 1.21%  
Acquisition Cost [2] ₩ 29 ₩ 29  
Book value [2] 29 29  
Fair value [2] ₩ 29 ₩ 29  
Samjin Placo Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 661 661  
Ownership [2] 0.52% 0.52%  
Acquisition Cost [2] ₩ 33 ₩ 33  
Book value [2] 33 33  
Fair value [2] ₩ 33 ₩ 33  
MS Steel Industrial Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 167 167  
Ownership [2] 0.40% 0.40%  
Acquisition Cost [2] ₩ 8 ₩ 8  
Book value [2] 8 8  
Fair value [2] ₩ 8 ₩ 8  
STS Global Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 9 9  
Ownership [2] 0.04% 0.04%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Y Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 855 855  
Ownership [2] 0.65% 0.65%  
Acquisition Cost [2] ₩ 34 ₩ 34  
Book value [2] 34 34  
Fair value [2] ₩ 34 ₩ 34  
CK Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   4,178  
Ownership [2]   7.54%  
Acquisition Cost [2]   ₩ 167  
Book value [2]   167  
Fair value [2]   ₩ 167  
J&J Tech Co.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 14 14  
Ownership [2] 0.22% 0.22%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Shield Board Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 165 165  
Ownership [2] 0.15% 0.15%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
SFC International Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 11 11  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Korea Ocean Machinery Technology Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   763  
Ownership [2]   0.45%  
Acquisition Cost [2]   ₩ 76  
Book value [2]   76  
Fair value [2]   ₩ 76  
Hana ITM Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 8,443 8,443  
Ownership [2] 0.70% 0.70%  
Acquisition Cost [2] ₩ 84 ₩ 84  
Book value [2] 84 84  
Fair value [2] ₩ 84 ₩ 84  
Jeuvis Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 191 191  
Ownership [2] 0.30% 0.30%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
JBM Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 662 662  
Ownership [2] 0.34% 0.34%  
Acquisition Cost [2] ₩ 20 ₩ 20  
Book value [2] 20 20  
Fair value [2] ₩ 20 ₩ 20  
Jungwoo Metal Solution Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 27 27  
Ownership [2] 0.08% 0.08%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
MS Precision Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 220 220  
Ownership [2] 0.16% 0.16%  
Acquisition Cost [2] ₩ 22 ₩ 22  
Book value [2] 22 22  
Fair value [2] ₩ 22 ₩ 22  
YM Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 2 2  
Ownership [2] 0.01% 0.01%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
C&C ENG Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 439 439  
Ownership [2] 1.59% 1.59%  
Acquisition Cost [2] ₩ 22 ₩ 22  
Book value [2] 22 22  
Fair value [2] ₩ 22 ₩ 22  
Minjin Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2]   24  
Ownership [2]   0.01%  
Acquisition Cost [2]   ₩ 1  
Book value [2]   1  
Fair value [2]   ₩ 1  
Daejoo E&G Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 133 133  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 27 ₩ 27  
Book value [2] 27 27  
Fair value [2] ₩ 27 ₩ 27  
Taeyoung Precision Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 31 31  
Ownership [2] 0.22% 0.22%  
Acquisition Cost [2] ₩ 1 ₩ 1  
Book value [2] 1 1  
Fair value [2] ₩ 1 ₩ 1  
Shin Heung Precision Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 93 93  
Ownership [2] 4.63% 4.63%  
Acquisition Cost [2] ₩ 4 ₩ 4  
Book value [2] 4 4  
Fair value [2] ₩ 4 ₩ 4  
TaeGwang PC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 530 530  
Ownership [2] 0.90% 0.90%  
Acquisition Cost [2] ₩ 13 ₩ 13  
Book value [2] 13 13  
Fair value [2] ₩ 13 ₩ 13  
KyeongGwang Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 244 244  
Ownership [2] 1.04% 1.04%  
Acquisition Cost [2] ₩ 7 ₩ 7  
Book value [2] 7 7  
Fair value [2] ₩ 7 ₩ 7  
Altron Jeonju Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 34,846 34,846  
Ownership [2] 1.34% 1.34%  
Acquisition Cost [2] ₩ 697 ₩ 697  
Book value [2] 5 5  
Fair value [2] ₩ 5 ₩ 5  
SKD Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 40    
Ownership [2] 0.28%    
Acquisition Cost [2] ₩ 20    
Book value [2] 20    
Fair value [2] ₩ 20    
Moohan Enterprise Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 63    
Ownership [2] 0.12%    
Acquisition Cost [2] ₩ 3    
Book value [2] 3    
Fair value [2] ₩ 3    
Value Invest Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 8    
Ownership [2] 0.00%    
Acquisition Cost [2] ₩ 2    
Book value [2] 2    
Fair value [2] ₩ 2    
Beomju Co Ltd [Member]      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,037    
Ownership [2] 0.60%    
Acquisition Cost [2] ₩ 42    
Book value [2] 42    
Fair value [2] ₩ 42    
C&A Industries Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 42,062    
Ownership [2] 0.26%    
Acquisition Cost [2] ₩ 21    
Book value [2] 21    
Fair value [2] ₩ 21    
Vehicle System Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 225    
Ownership [2] 0.19%    
Acquisition Cost [2] ₩ 23    
Book value [2] 23    
Fair value [2] ₩ 23    
CH Solution Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,456    
Ownership [2] 0.16%    
Acquisition Cost [2] ₩ 4    
Book value [2] 4    
Fair value [2] ₩ 4    
HNT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 8,567    
Ownership [2] 0.09%    
Acquisition Cost [2] ₩ 9    
Book value [2] 9    
Fair value [2] ₩ 9    
Sunquen Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 4    
Ownership [2] 0.01%    
Acquisition Cost [2] ₩ 0    
Book value [2] 0    
Fair value [2] ₩ 0    
Hapdong Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 7,096    
Ownership [2] 1.08%    
Acquisition Cost [2] ₩ 106    
Book value [2] 106    
Fair value [2] ₩ 106    
Shabath Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 48    
Ownership [2] 0.04%    
Acquisition Cost [2] ₩ 6    
Book value [2] 6    
Fair value [2] ₩ 6    
Woori Elec Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 102    
Ownership [2] 0.17%    
Acquisition Cost [2] ₩ 5    
Book value [2] 5    
Fair value [2] ₩ 5    
Dong-Yang Special Casting Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,027    
Ownership [2] 0.41%    
Acquisition Cost [2] ₩ 21    
Book value [2] 21    
Fair value [2] ₩ 21    
DYC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 638    
Ownership [2] 1.73%    
Acquisition Cost [2] ₩ 96    
Book value [2] 96    
Fair value [2] ₩ 96    
Haegang Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,687    
Ownership [2] 1.13%    
Acquisition Cost [2] ₩ 25    
Book value [2] 25    
Fair value [2] ₩ 25    
Daone Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 860    
Ownership [2] 0.23%    
Acquisition Cost [2] ₩ 9    
Book value [2] 9    
Fair value [2] ₩ 9    
Yeowoon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 3    
Ownership [2] 0.00%    
Acquisition Cost [2] ₩ 0    
Book value [2] 0    
Fair value [2] ₩ 0    
Evertrue Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 15    
Ownership [2] 0.00%    
Acquisition Cost [2] ₩ 0    
Book value [2] 0    
Fair value [2] ₩ 0    
Black Materials Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 37,038    
Ownership [2] 8.31%    
Acquisition Cost [2] ₩ 500    
Book value [2] 500    
Fair value [2] ₩ 500    
K Shipbuilding Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 8,622    
Ownership [2] 0.25%    
Acquisition Cost [2] ₩ 1,078    
Book value [2] 1,078    
Fair value [2] ₩ 1,078    
Seohan Food Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 83    
Ownership [2] 0.19%    
Acquisition Cost [2] ₩ 2    
Book value [2] 2    
Fair value [2] ₩ 2    
Andong Trading Corporation Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 42 42  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 2 ₩ 2  
Book value [2] 2 2  
Fair value [2] ₩ 2 ₩ 2  
RMK Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 63 63  
Ownership [2] 0.90% 0.90%  
Acquisition Cost [2] ₩ 22 ₩ 22  
Book value [2] 22 22  
Fair value [2] ₩ 22 ₩ 22  
Shinjin International Corporation Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 4    
Ownership [2] 0.01%    
Acquisition Cost [2] ₩ 1    
Book value [2] 1    
Fair value [2] ₩ 1    
Asan Wood      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 6,391    
Ownership [2] 1.03%    
Acquisition Cost [2] ₩ 64    
Book value [2] 64    
Fair value [2] ₩ 64    
Seil Textile Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 16 16  
Ownership [2] 0.15% 0.15%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
JSL Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 51 51  
Ownership [2] 0.49% 0.49%  
Acquisition Cost [2] ₩ 3 ₩ 3  
Book value [2] 3 3  
Fair value [2] ₩ 3 ₩ 3  
3i Powergen Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 0    
Ownership [2] 15.00%    
Acquisition Cost [2] ₩ 1,482    
Book value [2] 0    
Fair value [2] ₩ 0    
PT. Kedap Sayaaq      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 671    
Ownership [2] 10.00%    
Acquisition Cost [2] ₩ 18,540    
Book value [2] 0    
Fair value [2] ₩ 0    
Mediquitous Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 5,080    
Ownership [2] 0.64%    
Acquisition Cost [2] ₩ 1,250    
Book value [2] 1,250    
Fair value [2] ₩ 1,250    
Monit Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 166,667    
Ownership [2] 14.29%    
Acquisition Cost [2] ₩ 1,000    
Book value [2] 1,000    
Fair value [2] ₩ 1,000    
Enersys Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 9,763    
Ownership [2] 19.62%    
Acquisition Cost [2] ₩ 2,050    
Book value [2] 2,050    
Fair value [2] ₩ 2,050    
Kalman Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 23,172    
Ownership [2] 10.02%    
Acquisition Cost [2] ₩ 1,000    
Book value [2] 1,000    
Fair value [2] ₩ 1,000    
HiMet Corporation Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,754,386    
Ownership [2] 13.93%    
Acquisition Cost [2] ₩ 5,000    
Book value [2] 5,000    
Fair value [2] ₩ 5,000    
Wonil Image Maker Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 16    
Ownership [2] 0.04%    
Acquisition Cost [2] ₩ 0    
Book value [2] 0    
Fair value [2] ₩ 0    
Ohbaksa.com Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 52    
Ownership [2] 0.23%    
Acquisition Cost [2] ₩ 3    
Book value [2] 3    
Fair value [2] ₩ 3    
Hanyang Electric Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 918    
Ownership [2] 3.27%    
Acquisition Cost [2] ₩ 92    
Book value [2] 92    
Fair value [2] ₩ 92    
Geumchang Synthetic Fiber Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 119    
Ownership [2] 1.02%    
Acquisition Cost [2] ₩ 12    
Book value [2] 12    
Fair value [2] ₩ 12    
Sung Min Fishery Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 371    
Ownership [2] 0.09%    
Acquisition Cost [2] ₩ 4    
Book value [2] 4    
Fair value [2] ₩ 4    
Dreamfact Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 77    
Ownership [2] 0.10%    
Acquisition Cost [2] ₩ 3    
Book value [2] 3    
Fair value [2] ₩ 3    
Donyworld Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 125    
Ownership [2] 0.68%    
Acquisition Cost [2] ₩ 10    
Book value [2] 10    
Fair value [2] ₩ 10    
Dongsuh Companies Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 18    
Ownership [2] 0.23%    
Acquisition Cost [2] ₩ 2    
Book value [2] 2    
Fair value [2] ₩ 2    
Dondodam Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 262    
Ownership [2] 0.34%    
Acquisition Cost [2] ₩ 13    
Book value [2] 13    
Fair value [2] ₩ 13    
Vision Food Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,732    
Ownership [2] 1.00%    
Acquisition Cost [2] ₩ 86    
Book value [2] 86    
Fair value [2] ₩ 86    
Aone Metal Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 156    
Ownership [2] 0.89%    
Acquisition Cost [2] ₩ 16    
Book value [2] 16    
Fair value [2] ₩ 16    
Ecoplus Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 2,786    
Ownership [2] 0.91%    
Acquisition Cost [2] ₩ 3    
Book value [2] 3    
Fair value [2] ₩ 3    
Libechen Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 151    
Ownership [2] 0.13%    
Acquisition Cost [2] ₩ 8    
Book value [2] 8    
Fair value [2] ₩ 8    
Hongin Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 18    
Ownership [2] 0.03%    
Acquisition Cost [2] ₩ 5    
Book value [2] 5    
Fair value [2] ₩ 5    
Bolim Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 37    
Ownership [2] 0.10%    
Acquisition Cost [2] ₩ 5    
Book value [2] 5    
Fair value [2] ₩ 5    
Neo Life Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 19    
Ownership [2] 0.04%    
Acquisition Cost [2] ₩ 0    
Book value [2] 0    
Fair value [2] ₩ 0    
Daehong Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 1,152    
Ownership [2] 1.01%    
Acquisition Cost [2] ₩ 85    
Book value [2] 85    
Fair value [2] ₩ 85    
T-Eng Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 123    
Ownership [2] 1.05%    
Acquisition Cost [2] ₩ 25    
Book value [2] 25    
Fair value [2] ₩ 25    
Badanuri      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 8    
Ownership [2] 0.10%    
Acquisition Cost [2] ₩ 2    
Book value [2] 2    
Fair value [2] ₩ 2    
Daeyoung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 178    
Ownership [2] 0.56%    
Acquisition Cost [2] ₩ 63    
Book value [2] 63    
Fair value [2] ₩ 63    
Ki Soo Precision Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 325    
Ownership [2] 0.44%    
Acquisition Cost [2] ₩ 98    
Book value [2] 98    
Fair value [2] ₩ 98    
DNGV      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 5,516    
Ownership [2] 0.14%    
Acquisition Cost [2] ₩ 11    
Book value [2] 11    
Fair value [2] ₩ 11    
BJ Korea      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 446    
Ownership [2] 0.81%    
Acquisition Cost [2] ₩ 40    
Book value [2] 40    
Fair value [2] ₩ 40    
R&S Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 291    
Ownership [2] 0.61%    
Acquisition Cost [2] ₩ 4    
Book value [2] 4    
Fair value [2] ₩ 4    
Daekyoung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 85    
Ownership [2] 0.66%    
Acquisition Cost [2] ₩ 17    
Book value [2] 17    
Fair value [2] ₩ 17    
Gunsan Bio Energy Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2],[5] 200,000    
Ownership [2],[5] 18.87%    
Acquisition Cost [2],[5] ₩ 1,000    
Book value [2],[5] 0    
Fair value [2],[5] 0    
Debt securities [member]      
Financial assets at fair value through other comprehensive income [Line Items]      
Acquisition Cost [2] 4,571    
Book value [2] 4,627    
Fair value [2] ₩ 4,627    
Aron Flying Ship Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 0 0  
Ownership [2] 0.00% 0.00%  
Acquisition Cost [2] ₩ 491 ₩ 500  
Book value [2] 547 529  
Fair value [2] ₩ 547 ₩ 529  
Ino Platech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 0    
Ownership [2] 0.00%    
Acquisition Cost [2] ₩ 1,080    
Book value [2] 1,080    
Fair value [2] ₩ 1,080    
Daebon Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [2] 0    
Ownership [2] 0.00%    
Acquisition Cost [2] ₩ 3,000    
Book value [2] 3,000    
Fair value [2] ₩ 3,000    
[1] The shares were acquired through a debt-to-equity conversion during the year ended December 31, 2023, in accordance with the corporate rehabilitation procedures of BDI Co., Ltd. Since the Company has no capacity to exercise significant influence until the rehabilitation procedures are complete, the Company has classified the investment as financial assets measured at fair value through other comprehensive income.
[2] The Company used initial cost as their fair value because there was not enough information to determine fair value, and the range of the estimated fair value is wide.
[3] The Company has estimated the fair value of Set Holding by using the discounted cash flow method and has recognized the difference between its fair value and book value as gain or loss on valuation of financial assets at FVOCI in other comprehensive income or loss during the year ended December 31, 2023.
[4] The Company has estimated the fair value of Set Holding by using the discounted cash flow method and has recognized the difference between its fair value and book value as gain or loss on valuation of financial assets at FVOCI in other comprehensive income or loss during the year ended December 31, 2022.
[5] The investee declared bankruptcy during the year ended December 31, 2023. The Company has no capacity to exercise significant influence on the investee due to the receivership of the investee by a trustee in bankruptcy, so the investment was reclassified as financial assets measured at fair value through other comprehensive income.