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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, 2022
Dec. 31, 2021
Dec. 31, 2020
Financial assets at fair value through other comprehensive income [Line Items]      
Acquisition Cost ₩ 594,355 ₩ 589,194  
Book value 502,829 435,107 ₩ 358,559
Fair value 502,829 435,107  
Listed equity securities      
Financial assets at fair value through other comprehensive income [Line Items]      
Acquisition Cost 324,790 324,790  
Book value 300,057 273,826 194,669
Fair value ₩ 300,057 ₩ 273,826  
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 64,526 87,733  
Fair value ₩ 64,526 ₩ 87,733  
Ssangyong Motor Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 12,205 38,568  
Ownership 0.03% 0.03%  
Acquisition Cost ₩ 428 ₩ 428  
Book value 107 0  
Fair value ₩ 107 ₩ 0  
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 121 121  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 15 ₩ 15  
Book value 0 1  
Fair value ₩ 0 ₩ 1  
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 34 42  
Fair value ₩ 34 ₩ 42  
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 9 8  
Fair value ₩ 9 ₩ 8  
STX Heavy Industries Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 7,419 7,419  
Ownership 0.03% 0.03%  
Acquisition Cost ₩ 107 ₩ 107  
Book value 54 35  
Fair value ₩ 54 ₩ 35  
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 149,503 89,747  
Fair value ₩ 149,503 ₩ 89,747  
Denison Mines Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 58,284,000 58,284,000  
Ownership 7.09% 9.76%  
Acquisition Cost ₩ 84,134 ₩ 84,134  
Book value 84,502 94,376  
Fair value ₩ 84,502 ₩ 94,376  
Fission Uranium Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 100,000 100,000  
Ownership 1.73% 0.02%  
Acquisition Cost ₩ 41 ₩ 41  
Book value 75 73  
Fair value ₩ 75 ₩ 73  
SangSangin Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 5,831 5,831  
Ownership 0.01% 0.01%  
Acquisition Cost ₩ 38 ₩ 38  
Book value 3 6  
Fair value ₩ 3 ₩ 6  
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 2  
Fair value ₩ 0 ₩ 2  
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 3 2  
Fair value ₩ 3 ₩ 2  
Vissem electronics, Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 229 229  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 11 ₩ 11  
Book value 1 2  
Fair value ₩ 1 ₩ 2  
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 1  
Fair value ₩ 0 ₩ 1  
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 1,229 1,779  
Fair value ₩ 1,229 ₩ 1,779  
Aone Alform Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 2,672 2,672  
Ownership 0.04% 0.08%  
Acquisition Cost ₩ 19 ₩ 19  
Book value 10 18  
Fair value 10 18  
Unlisted equity securities      
Financial assets at fair value through other comprehensive income [Line Items]      
Acquisition Cost [1] 269,065 263,904  
Book value 202,243 [1] 160,790 [1] ₩ 163,890
Fair value [1] ₩ 202,243 ₩ 160,790  
Intellectual Discovery Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 200,000 1,000,000  
Ownership [1] 6.00% 6.00%  
Acquisition Cost [1] ₩ 5,000 ₩ 5,000  
Book value [1] 954 954  
Fair value [1] ₩ 954 ₩ 954  
Hwan Young Steel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 10,916 10,916  
Ownership [1] 0.14% 0.14%  
Acquisition Cost [1] ₩ 1,092 ₩ 1,092  
Book value [1] 97 97  
Fair value [1] ₩ 97 ₩ 97  
SAMBO AUTO. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 15,066 15,066  
Ownership [1] 0.02% 0.02%  
Acquisition Cost [1] ₩ 38 ₩ 38  
Book value [1] 38 38  
Fair value [1] ₩ 38 ₩ 38  
Mobo Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 504 504  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 14 ₩ 14  
Book value [1] 14 14  
Fair value [1] ₩ 14 ₩ 14  
Dae Kwang Semiconductor Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 589 589  
Ownership [1] 0.07% 0.07%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
Sanbon Department Store      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 828 828  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 124 ₩ 124  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Miju Steel Mfg. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,097 1,097  
Ownership [1] 0.23% 0.23%  
Acquisition Cost [1] ₩ 50 ₩ 50  
Book value [1] 50 50  
Fair value [1] ₩ 50 ₩ 50  
Sungwon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 117 117  
Ownership [1] 0.07% 0.07%  
Acquisition Cost [1] ₩ 29 ₩ 29  
Book value [1] 29 29  
Fair value [1] ₩ 29 ₩ 29  
IMHWA Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 329 329  
Ownership [1] 0.11% 0.11%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
DALIM Special Vehicle Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 58 58  
Ownership [1] 0.08% 0.08%  
Acquisition Cost [1] ₩ 10 ₩ 10  
Book value [1] 10 10  
Fair value [1] ₩ 10 ₩ 10  
ASA JEONJU Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   34,846  
Ownership [1]   1.34%  
Acquisition Cost [1]   ₩ 697  
Book value [1]   69  
Fair value [1]   ₩ 69  
Moonkyung Silica Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 42 42  
Ownership [1] 0.56% 0.56%  
Acquisition Cost [1] ₩ 0 ₩ 0  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Sungkwang Timber Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 3 3  
Ownership [1] 0.08% 0.08%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
HJ Steel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   218  
Ownership [1]   0.07%  
Acquisition Cost [1]   ₩ 2  
Book value [1]   2  
Fair value [1]   ₩ 2  
KS Remicon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 12 12  
Ownership [1] 0.04% 0.04%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Joongang Platec Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 3,591 3,591  
Ownership [1] 0.75% 0.75%  
Acquisition Cost [1] ₩ 72 ₩ 72  
Book value [1] 35 35  
Fair value [1] ₩ 35 ₩ 35  
Pyungsan SI Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 434 434  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 4 ₩ 9  
Book value [1] 4 9  
Fair value [1] ₩ 4 ₩ 9  
Samgong Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 12 12  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 7 ₩ 7  
Book value [1] 7 7  
Fair value [1] ₩ 7 ₩ 7  
Joongang Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 540 540  
Ownership [1] 0.12% 0.12%  
Acquisition Cost [1] ₩ 8 ₩ 8  
Book value [1] 8 8  
Fair value [1] ₩ 8 ₩ 8  
AJS Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 12,906 12,906  
Ownership [1] 0.23% 0.23%  
Acquisition Cost [1] ₩ 32 ₩ 32  
Book value [1] 32 32  
Fair value [1] ₩ 32 ₩ 32  
MSE Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 429 429  
Ownership [1] 0.13% 0.13%  
Acquisition Cost [1] ₩ 9 ₩ 9  
Book value [1] 9 9  
Fair value [1] ₩ 9 ₩ 9  
Ilrim Nano Tec Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,520 1,520  
Ownership [1] 0.07% 0.07%  
Acquisition Cost [1] ₩ 15 ₩ 15  
Book value [1] 15 15  
Fair value [1] ₩ 15 ₩ 15  
Youngjin Hi-Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   11,109  
Ownership [1]   0.25%  
Acquisition Cost [1]   ₩ 255  
Book value [1]   150  
Fair value [1]   ₩ 150  
Buyoung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   270  
Ownership [1]   0.00%  
Acquisition Cost [1]   ₩ 3  
Book value [1]   3  
Fair value [1]   ₩ 3  
Ilsuk Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 152 152  
Ownership [1] 0.17% 0.17%  
Acquisition Cost [1] ₩ 10 ₩ 10  
Book value [1] 10 10  
Fair value [1] ₩ 10 ₩ 10  
Zyle Daewoo Motor Sales Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 22 22  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 0 ₩ 0  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Daewoo Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 8 8  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 0 ₩ 0  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Seyang Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 537 537  
Ownership [1] 0.05% 0.05%  
Acquisition Cost [1] ₩ 27 ₩ 27  
Book value [1] 30 27  
Fair value [1] ₩ 30 ₩ 27  
Seungri Enterprise Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 93 93  
Ownership [1] 0.05% 0.05%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Shin-E P&C Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,569 1,569  
Ownership [1] 0.64% 0.64%  
Acquisition Cost [1] ₩ 110 ₩ 111  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Ejung Ad Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 132 132  
Ownership [1] 0.09% 0.09%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Solvus Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,056 1,056  
Ownership [1] 0.04% 0.04%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Myung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 89 89  
Ownership [1] 0.05% 0.05%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Biwang Industry Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 406 406  
Ownership [1] 0.04% 0.04%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Young Sung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 89 89  
Ownership [1] 0.40% 0.40%  
Acquisition Cost [1] ₩ 26 ₩ 26  
Book value [1] 26 26  
Fair value [1] ₩ 26 ₩ 26  
Yuil Industrial Electronics Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 804 804  
Ownership [1] 0.32% 0.32%  
Acquisition Cost [1] ₩ 15 ₩ 15  
Book value [1] 15 15  
Fair value [1] ₩ 15 ₩ 15  
Woojin Industry Corporation      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 3 3  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 16 ₩ 16  
Book value [1] 16 16  
Fair value [1] ₩ 16 ₩ 16  
Kwang Sung Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 325 325  
Ownership [1] 0.35% 0.35%  
Acquisition Cost [1] ₩ 7 ₩ 7  
Book value [1] 7 7  
Fair value [1] ₩ 7 ₩ 7  
Futech Mold Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 274 274  
Ownership [1] 0.27% 0.27%  
Acquisition Cost [1] ₩ 14 ₩ 14  
Book value [1] 14 14  
Fair value [1] ₩ 14 ₩ 14  
Woojoo Environment Ind. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 101 101  
Ownership [1] 0.11% 0.11%  
Acquisition Cost [1] ₩ 13 ₩ 13  
Book value [1] 13 13  
Fair value [1] ₩ 13 ₩ 13  
Hyungji Esquire Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 61 61  
Ownership [1] 0.02% 0.02%  
Acquisition Cost [1] ₩ 22 ₩ 22  
Book value [1] 22 22  
Fair value [1] ₩ 22 ₩ 22  
Morado Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 209 209  
Ownership [1] 0.04% 0.04%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Myung Sung Tex Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 20 20  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Kwang Sung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 610 610  
Ownership [1] 0.53% 0.53%  
Acquisition Cost [1] ₩ 31 ₩ 31  
Book value [1] 31 31  
Fair value [1] ₩ 31 ₩ 31  
Seen Business and Technology co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 29,424 29,424  
Ownership [1] 0.73% 0.73%  
Acquisition Cost [1] ₩ 148 ₩ 148  
Book value [1] 7 7  
Fair value [1] ₩ 7 ₩ 7  
Woobang Construction Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 8 8  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 8 ₩ 8  
Book value [1] 8 8  
Fair value [1] ₩ 8 ₩ 8  
Shin Pyung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 6 6  
Ownership [1] 0.03% 0.03%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
JMC Heavy Industries Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 2,724 2,724  
Ownership [1] 0.10% 0.10%  
Acquisition Cost [1] ₩ 27 ₩ 27  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Najin Steel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 37 37  
Ownership [1] 0.06% 0.06%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
Sinkwang Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,091 1,091  
Ownership [1] 1.68% 1.68%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
Elephant & Friends Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 563 563  
Ownership [1] 0.61% 0.61%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Mireco Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 109 109  
Ownership [1] 0.25% 0.25%  
Acquisition Cost [1] ₩ 11 ₩ 11  
Book value [1] 11 11  
Fair value [1] ₩ 11 ₩ 11  
L&K Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,615 1,615  
Ownership [1] 0.60% 0.60%  
Acquisition Cost [1] ₩ 24 ₩ 24  
Book value [1] 24 24  
Fair value [1] ₩ 24 ₩ 24  
JO Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,263 1,263  
Ownership [1] 0.62% 0.62%  
Acquisition Cost [1] ₩ 25 ₩ 25  
Book value [1] 25 25  
Fair value [1] ₩ 25 ₩ 25  
Kendae Printing Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 422 422  
Ownership [1] 0.60% 0.60%  
Acquisition Cost [1] ₩ 21 ₩ 21  
Book value [1] 21 21  
Fair value [1] ₩ 21 ₩ 21  
Dauning Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 231 231  
Ownership [1] 0.41% 0.41%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
Korea Trecision Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 22 22  
Ownership [1] 0.45% 0.45%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
Ace Track Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   3,130  
Ownership [1]   1.08%  
Acquisition Cost [1]   ₩ 219  
Book value [1]   59  
Fair value [1]   ₩ 59  
Dung Hwan Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   556  
Ownership [1]   0.02%  
Acquisition Cost [1]   ₩ 6  
Book value [1]   6  
Fair value [1]   ₩ 6  
Hurim Biocell Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,021 1,021  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
Smart Power Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 133,333 133,333  
Ownership [1] 4.14% 4.14%  
Acquisition Cost [1] ₩ 200 ₩ 200  
Book value [1] 200 200  
Fair value [1] ₩ 200 ₩ 200  
Sunjin Power Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 4,941 4,941  
Ownership [1] 0.92% 0.92%  
Acquisition Cost [1] ₩ 247 ₩ 247  
Book value [1] 32 32  
Fair value [1] ₩ 32 ₩ 32  
Beer Yeast Korea Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,388 1,388  
Ownership [1] 0.43% 0.43%  
Acquisition Cost [1] ₩ 7 ₩ 7  
Book value [1] 7 7  
Fair value [1] ₩ 7 ₩ 7  
B CON Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 96 96  
Ownership [1] 1.16% 1.16%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
Ace Integration Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 105 105  
Ownership [1] 0.09% 0.09%  
Acquisition Cost [1] ₩ 24 ₩ 24  
Book value [1] 24 24  
Fair value [1] ₩ 24 ₩ 24  
AceInti Agricultural Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 16 16  
Ownership [1] 0.02% 0.02%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
KyungDong Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 130 130  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
ChunWon Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 193 193  
Ownership [1] 0.19% 0.19%  
Acquisition Cost [1] ₩ 39 ₩ 39  
Book value [1] 39 39  
Fair value [1] ₩ 39 ₩ 39  
SungLim Industrial Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 29 29  
Ownership [1] 0.03% 0.03%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Korea Minerals Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 191 191  
Ownership [1] 0.05% 0.05%  
Acquisition Cost [1] ₩ 134 ₩ 134  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
HyoDong Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 128 128  
Ownership [1] 0.16% 0.16%  
Acquisition Cost [1] ₩ 25 ₩ 25  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Haspe Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   652  
Ownership [1]   0.55%  
Acquisition Cost [1]   ₩ 20  
Book value [1]   20  
Fair value [1]   ₩ 20  
JoHyun Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 350 350  
Ownership [1] 1.56% 1.56%  
Acquisition Cost [1] ₩ 18 ₩ 18  
Book value [1] 18 18  
Fair value [1] ₩ 18 ₩ 18  
KC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 5,107 5,107  
Ownership [1] 0.17% 0.17%  
Acquisition Cost [1] ₩ 26 ₩ 26  
Book value [1] 26 26  
Fair value [1] ₩ 26 ₩ 26  
SeongJi Industrial Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 41 41  
Ownership [1] 0.05% 0.05%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Seyang Precision Ind.Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 829 829  
Ownership [1] 0.23% 0.23%  
Acquisition Cost [1] ₩ 41 ₩ 41  
Book value [1] 41 41  
Fair value [1] ₩ 41 ₩ 41  
Dooriwon Food System Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 13 13  
Ownership [1] 0.27% 0.27%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
ShinShin Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   339  
Ownership [1]   1.12%  
Acquisition Cost [1]   ₩ 17  
Book value [1]   17  
Fair value [1]   ₩ 17  
Sung Kwang Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 23 23  
Ownership [1] 0.37% 0.37%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
Shinheung Petrol. Co. Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 699 699  
Ownership [1] 0.14% 0.14%  
Acquisition Cost [1] ₩ 35 ₩ 35  
Book value [1] 35 35  
Fair value [1] ₩ 35 ₩ 35  
Force TEC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 3,501 3,501  
Ownership [1] 0.02% 0.02%  
Acquisition Cost [1] ₩ 18 ₩ 18  
Book value [1] 18 18  
Fair value [1] ₩ 18 ₩ 18  
Samsung Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 486 486  
Ownership [1] 1.28% 1.28%  
Acquisition Cost [1] ₩ 97 ₩ 97  
Book value [1] 36 36  
Fair value [1] ₩ 36 ₩ 36  
Younil Metal Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 41 41  
Ownership [1] 0.21% 0.21%  
Acquisition Cost [1] ₩ 21 ₩ 21  
Book value [1] 21 21  
Fair value [1] ₩ 21 ₩ 21  
CJ Paradise Co.,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 24 24  
Ownership [1] 0.02% 0.02%  
Acquisition Cost [1] ₩ 12 ₩ 12  
Book value [1] 12 12  
Fair value [1] ₩ 12 ₩ 12  
Han Young Technology Company Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 35 35  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 0 ₩ 0  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
K Shipbuilding Co., Ltd. (formerly, STX Offshore & Shipbuilding Co., Ltd.)      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   8,622  
Ownership [1]   0.25%  
Acquisition Cost [1]   ₩ 1,078  
Book value [1]   1,078  
Fair value [1]   ₩ 1,078  
Ptotronics Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 843 843  
Ownership [1] 0.42% 0.42%  
Acquisition Cost [1] ₩ 84 ₩ 84  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
NFT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 136 136  
Ownership [1] 0.40% 0.40%  
Acquisition Cost [1] ₩ 8 ₩ 8  
Book value [1] 8 8  
Fair value [1] ₩ 8 ₩ 8  
Hyundaitech Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,363 1,363  
Ownership [1] 0.87% 0.87%  
Acquisition Cost [1] ₩ 27 ₩ 27  
Book value [1] 27 27  
Fair value [1] ₩ 27 ₩ 27  
Dasan Material Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 29 29  
Ownership [1] 0.04% 0.04%  
Acquisition Cost [1] ₩ 22 ₩ 22  
Book value [1] 22 22  
Fair value [1] ₩ 22 ₩ 22  
Fish World Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 47 47  
Ownership [1] 0.21% 0.21%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
SG Shinsung Engineering and Construction Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 10 10  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Samdo Industry Electric Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 48 48  
Ownership [1] 0.02% 0.02%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Taejung Industries Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 9,268 9,268  
Ownership [1] 0.30% 0.30%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
Shinsei Trading Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 64 64  
Ownership [1] 0.72% 0.72%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
Dynamic Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 111 111  
Ownership [1] 0.19% 0.19%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Green Alchemy Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 38,202 38,202  
Ownership [1] 1.48% 1.48%  
Acquisition Cost [1] ₩ 191 ₩ 191  
Book value [1] 17 17  
Fair value [1] ₩ 17 ₩ 17  
Youone TBM Engineering & Construction Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 615 615  
Ownership [1] 0.27% 0.27%  
Acquisition Cost [1] ₩ 31 ₩ 31  
Book value [1] 31 31  
Fair value [1] ₩ 31 ₩ 31  
KM Leatech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,648 1,648  
Ownership [1] 0.98% 0.98%  
Acquisition Cost [1] ₩ 8 ₩ 8  
Book value [1] 8 8  
Fair value [1] ₩ 8 ₩ 8  
Semist Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 555 555  
Ownership [1] 0.80% 0.80%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Sewon Bus Co.,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 12 12  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 0 ₩ 0  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Enertec Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 7,937 7,937  
Ownership [1] 0.19% 0.19%  
Acquisition Cost [1] ₩ 44 ₩ 44  
Book value [1] 44 44  
Fair value [1] ₩ 44 ₩ 44  
Sangji Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 20 20  
Ownership [1] 0.26% 0.26%  
Acquisition Cost [1] ₩ 4 ₩ 4  
Book value [1] 4 4  
Fair value [1] ₩ 4 ₩ 4  
Bellie Doughnuts Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 169 169  
Ownership [1] 0.19% 0.19%  
Acquisition Cost [1] ₩ 10 ₩ 10  
Book value [1] 10 10  
Fair value [1] ₩ 10 ₩ 10  
AIRTECH Information communication Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 2,379 2,379  
Ownership [1] 0.60% 0.60%  
Acquisition Cost [1] ₩ 12 ₩ 12  
Book value [1] 12 12  
Fair value [1] ₩ 12 ₩ 12  
Kiscom Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,493 1,493  
Ownership [1] 0.04% 0.04%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Wonil laser Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   157  
Ownership [1]   0.37%  
Acquisition Cost [1]   ₩ 16  
Book value [1]   16  
Fair value [1]   ₩ 16  
Pyung Hwa Industrial Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   3,388  
Ownership [1]   3.00%  
Acquisition Cost [1]   ₩ 85  
Book value [1]   85  
Fair value [1]   ₩ 85  
Set Holding      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,100,220 [2] 1,100,220 [3]  
Ownership [1] 2.50% [2] 2.50% [3]  
Acquisition Cost [1] ₩ 229,255 [2] ₩ 229,255 [3]  
Book value [1] 163,580 [2] 131,036 [3]  
Fair value [1] ₩ 163,580 [2] ₩ 131,036 [3]  
PT. Cirebon Energi Prasarana      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   22,420  
Ownership [1]   10.00%  
Acquisition Cost [1]   ₩ 2,612  
Book value [1]   2,658  
Fair value [1]   ₩ 2,658  
Choheung packing Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 61 61  
Ownership [1] 0.13% 0.13%  
Acquisition Cost [1] ₩ 12 ₩ 12  
Book value [1] 12 12  
Fair value [1] ₩ 12 ₩ 12  
Jaewoo Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 359 359  
Ownership [1] 0.24% 0.24%  
Acquisition Cost [1] ₩ 11 ₩ 11  
Book value [1] 11 11  
Fair value [1] ₩ 11 ₩ 11  
Wooyang HC Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,375 1,375  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 159 ₩ 159  
Book value [1] 13 13  
Fair value [1] ₩ 13 ₩ 13  
TheYeonriji Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 116 116  
Ownership [1] 0.10% 0.10%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
Flusys Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 9 9  
Ownership [1] 0.08% 0.08%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
DongSeo Electronics Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 347 347  
Ownership [1] 0.07% 0.07%  
Acquisition Cost [1] ₩ 17 ₩ 16  
Book value [1] 17 17  
Fair value [1] ₩ 17 ₩ 17  
Daewoo Display Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 177 177  
Ownership [1] 0.03% 0.03%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
NTS Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 143 143  
Ownership [1] 0.22% 0.22%  
Acquisition Cost [1] ₩ 36 ₩ 36  
Book value [1] 36 36  
Fair value [1] ₩ 36 ₩ 36  
AID CO., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,212 1,212  
Ownership [1] 0.57% 0.57%  
Acquisition Cost [1] ₩ 36 ₩ 36  
Book value [1] 36 36  
Fair value [1] ₩ 36 ₩ 36  
Changwon Eco-friendly farming corp      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 3 3  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 0 ₩ 0  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Kumo Hitech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 6,697 6,697  
Ownership [1] 0.53% 0.53%  
Acquisition Cost [1] ₩ 100 ₩ 100  
Book value [1] 32 32  
Fair value [1] ₩ 32 ₩ 32  
Kyung Pyo Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 186 186  
Ownership [1] 0.76% 0.76%  
Acquisition Cost [1] ₩ 19 ₩ 19  
Book value [1] 19 19  
Fair value [1] ₩ 19 ₩ 19  
Daedong Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 53 617  
Ownership [1] 0.06% 0.55%  
Acquisition Cost [1] ₩ 5 ₩ 46  
Book value [1] 5 46  
Fair value [1] ₩ 5 ₩ 46  
Doosung Heavy Industries Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   53  
Ownership [1]   0.06%  
Acquisition Cost [1]   ₩ 5  
Book value [1]   5  
Fair value [1]   ₩ 5  
Samjoo Hightech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 522 522  
Ownership [1] 0.08% 0.08%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Samkwang Chemical Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 204 204  
Ownership [1] 1.27% 1.27%  
Acquisition Cost [1] ₩ 51 ₩ 51  
Book value [1] 51 51  
Fair value [1] ₩ 51 ₩ 51  
SG Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   213  
Ownership [1]   0.54%  
Acquisition Cost [1]   ₩ 21  
Book value [1]   21  
Fair value [1]   ₩ 21  
Shinseung Chemical Industy Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 5 5  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 60 ₩ 60  
Book value [1] 0 60  
Fair value [1] ₩ 0 ₩ 60  
KJ Alloy Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 368 368  
Ownership [1] 0.20% 0.20%  
Acquisition Cost [1] ₩ 7 ₩ 7  
Book value [1] 7 7  
Fair value [1] ₩ 7 ₩ 7  
SM Hi-tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 22 22  
Ownership [1] 0.39% 0.39%  
Acquisition Cost [1] ₩ 22 ₩ 22  
Book value [1] 22 22  
Fair value [1] ₩ 22 ₩ 22  
Puruen Environment Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 967 967  
Ownership [1] 1.34% 1.34%  
Acquisition Cost [1] ₩ 19 ₩ 19  
Book value [1] 19 19  
Fair value [1] ₩ 19 ₩ 19  
Miretech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 9,111 9,111  
Ownership [1] 0.27% 0.27%  
Acquisition Cost [1] ₩ 18 ₩ 18  
Book value [1] 18 18  
Fair value [1] ₩ 18 ₩ 18  
Sejin Hightech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 17,980 17,980  
Ownership [1] 0.16% 0.16%  
Acquisition Cost [1] ₩ 18 ₩ 18  
Book value [1] 18 18  
Fair value [1] ₩ 18 ₩ 18  
Eun Sung Enterprise Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,131 1,131  
Ownership [1] 0.72% 0.72%  
Acquisition Cost [1] ₩ 17 ₩ 17  
Book value [1] 17 17  
Fair value [1] ₩ 17 ₩ 17  
Dongdo Basalt Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   182  
Ownership [1]   1.50%  
Acquisition Cost [1]   ₩ 73  
Book value [1]   73  
Fair value [1]   ₩ 73  
Shinyoung Textiles Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 523 523  
Ownership [1] 1.01% 1.01%  
Acquisition Cost [1] ₩ 52 ₩ 52  
Book value [1] 23 23  
Fair value [1] ₩ 23 ₩ 23  
Ilwoo Steel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 41 41  
Ownership [1] 0.28% 0.28%  
Acquisition Cost [1] ₩ 17 ₩ 17  
Book value [1] 17 17  
Fair value [1] ₩ 17 ₩ 17  
Dong-un Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,159 1,159  
Ownership [1] 6.28% 6.28%  
Acquisition Cost [1] ₩ 81 ₩ 81  
Book value [1] 34 81  
Fair value [1] ₩ 34 ₩ 81  
Wongwang Door Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 575 575  
Ownership [1] 1.00% 1.00%  
Acquisition Cost [1] ₩ 29 ₩ 29  
Book value [1] 29 29  
Fair value [1] ₩ 29 ₩ 29  
Mansu Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 344 344  
Ownership [1] 0.25% 0.25%  
Acquisition Cost [1] ₩ 15 ₩ 15  
Book value [1] 15 15  
Fair value [1] ₩ 15 ₩ 15  
Eanskorea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 39 39  
Ownership [1] 0.05% 0.05%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Youngdongseafood Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 165 165  
Ownership [1] 0.33% 0.33%  
Acquisition Cost [1] ₩ 8 ₩ 8  
Book value [1] 8 8  
Fair value [1] ₩ 8 ₩ 8  
Hyunwoo Winstar Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1 1  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 0 ₩ 0  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Sehwa Diecasting Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   299  
Ownership [1]   1.66%  
Acquisition Cost [1]   ₩ 44  
Book value [1]   44  
Fair value [1]   ₩ 44  
Sungchang Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 159 159  
Ownership [1] 0.31% 0.31%  
Acquisition Cost [1] ₩ 19 ₩ 10  
Book value [1] 19 10  
Fair value [1] ₩ 19 ₩ 10  
Yuchang Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 90 90  
Ownership [1] 0.11% 0.11%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
Jeongpum Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 322 322  
Ownership [1] 0.35% 0.35%  
Acquisition Cost [1] ₩ 16 ₩ 16  
Book value [1] 16 16  
Fair value [1] ₩ 16 ₩ 16  
Korea Steel Power Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 2,761 2,761  
Ownership [1] 1.88% 1.88%  
Acquisition Cost [1] ₩ 55 ₩ 55  
Book value [1] 2 55  
Fair value [1] ₩ 2 ₩ 55  
Amanex Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 10 10  
Ownership [1] 0.02% 0.02%  
Acquisition Cost [1] ₩ 9 ₩ 9  
Book value [1] 9 9  
Fair value [1] ₩ 9 ₩ 9  
Dae-A Leisure Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 23 23  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 4 ₩ 4  
Book value [1] 4 4  
Fair value [1] ₩ 4 ₩ 4  
Caffe Bene Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,908 1,908  
Ownership [1] 0.03% 0.03%  
Acquisition Cost [1] ₩ 9 ₩ 9  
Book value [1] 9 9  
Fair value [1] ₩ 9 ₩ 9  
Shinjin International Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 4 4  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Jinhung Packaging Co.,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 4,329 4,329  
Ownership [1] 3.02% 3.02%  
Acquisition Cost [1] ₩ 22 ₩ 22  
Book value [1] 22 22  
Fair value [1] ₩ 22 ₩ 22  
Donglim Eng Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 26 26  
Ownership [1] 0.11% 0.11%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
SIP Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 274 274  
Ownership [1] 0.55% 0.55%  
Acquisition Cost [1] ₩ 7 ₩ 7  
Book value [1] 7 7  
Fair value [1] ₩ 7 ₩ 7  
Clizen Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 615 615  
Ownership [1] 0.34% 0.34%  
Acquisition Cost [1] ₩ 31 ₩ 31  
Book value [1] 31 31  
Fair value [1] ₩ 31 ₩ 31  
DAEDONGMILLENNIUM Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   159  
Ownership [1]   0.42%  
Acquisition Cost [1]   ₩ 32  
Book value [1]   32  
Fair value [1]   ₩ 32  
Daeji Product Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 15 15  
Ownership [1] 0.05% 0.05%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Jaein Circuit Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   498  
Ownership [1]   1.12%  
Acquisition Cost [1]   ₩ 65  
Book value [1]   65  
Fair value [1]   ₩ 65  
SSET Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 181 181  
Ownership [1] 0.30% 0.30%  
Acquisition Cost [1] ₩ 18 ₩ 18  
Book value [1] 18 18  
Fair value [1] ₩ 18 ₩ 18  
Sewon PM Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 963 963  
Ownership [1] 1.11% 1.11%  
Acquisition Cost [1] ₩ 48 ₩ 48  
Book value [1] 48 48  
Fair value [1] ₩ 48 ₩ 48  
Dawon Yuhwa Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 506 506  
Ownership [1] 1.94% 1.94%  
Acquisition Cost [1] ₩ 25 ₩ 25  
Book value [1] 25 25  
Fair value [1] ₩ 25 ₩ 25  
Ogokbaekkwa Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 101 101  
Ownership [1] 0.12% 0.12%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Shinwoo Toptech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 834 834  
Ownership [1] 0.51% 0.51%  
Acquisition Cost [1] ₩ 83 ₩ 83  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
KMLC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 281 281  
Ownership [1] 0.14% 0.14%  
Acquisition Cost [1] ₩ 22 ₩ 22  
Book value [1] 22 22  
Fair value [1] ₩ 22 ₩ 22  
Seinfood Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 13 13  
Ownership [1] 0.17% 0.17%  
Acquisition Cost [1] ₩ 7 ₩ 7  
Book value [1] 7 7  
Fair value [1] ₩ 7 ₩ 7  
TaeSung Eco-Tech. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,368 1,368  
Ownership [1] 4.55% 4.55%  
Acquisition Cost [1] ₩ 34 ₩ 34  
Book value [1] 34 34  
Fair value [1] ₩ 34 ₩ 34  
Kukex Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 639 639  
Ownership [1] 0.05% 0.05%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Youngshin Plus Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 104 104  
Ownership [1] 0.12% 0.12%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
Chang won Engineering Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 22 22  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 4 ₩ 4  
Book value [1] 4 4  
Fair value [1] ₩ 4 ₩ 4  
Samsung Silup Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 47 47  
Ownership [1] 0.19% 0.19%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
Samwon Bio Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 390 390  
Ownership [1] 0.25% 0.25%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
IZU KOREA Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 48 48  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Dongdo CNP Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 234 234  
Ownership [1] 0.36% 0.36%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
Dae Bang Industry Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 115 115  
Ownership [1] 0.13% 0.13%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
S.I.T. Co.,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 2,213 2,213  
Ownership [1] 0.44% 0.44%  
Acquisition Cost [1] ₩ 22 ₩ 22  
Book value [1] 22 22  
Fair value [1] ₩ 22 ₩ 22  
Taejin Hiech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 78 78  
Ownership [1] 0.26% 0.26%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Headone Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 69 69  
Ownership [1] 0.12% 0.12%  
Acquisition Cost [1] ₩ 7 ₩ 7  
Book value [1] 7 7  
Fair value [1] ₩ 7 ₩ 7  
E-Won Solutech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 158 158  
Ownership [1] 0.16% 0.16%  
Acquisition Cost [1] ₩ 40 ₩ 40  
Book value [1] 40 40  
Fair value [1] ₩ 40 ₩ 40  
MJT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   1,013  
Ownership [1]   0.20%  
Acquisition Cost [1]   ₩ 51  
Book value [1]   51  
Fair value [1]   ₩ 51  
KPL Circuit Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 283 283  
Ownership [1] 0.08% 0.08%  
Acquisition Cost [1] ₩ 14 ₩ 14  
Book value [1] 14 14  
Fair value [1] ₩ 14 ₩ 14  
Road Solar Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 12 12  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 0 ₩ 0  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Han Mi Flexible Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 143 143  
Ownership [1] 0.20% 0.20%  
Acquisition Cost [1] ₩ 43 ₩ 43  
Book value [1] 43 43  
Fair value [1] ₩ 43 ₩ 43  
Samhwa Casting Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   200  
Ownership [1]   0.04%  
Acquisition Cost [1]   ₩ 100  
Book value [1]   100  
Fair value [1]   ₩ 100  
Millennium PNT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 227 227  
Ownership [1] 0.37% 0.37%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
GN Chem Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 40 40  
Ownership [1] 0.07% 0.07%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
GW Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   505  
Ownership [1]   0.07%  
Acquisition Cost [1]   ₩ 51  
Book value [1]   51  
Fair value [1]   ₩ 51  
TM Construction co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   4  
Ownership [1]   0.00%  
Acquisition Cost [1]   ₩ 0  
Book value [1]   0  
Fair value [1]   ₩ 0  
Dae Myung Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 114 114  
Ownership [1] 0.08% 0.08%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Nanomicart Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 176 176  
Ownership [1] 1.06% 1.06%  
Acquisition Cost [1] ₩ 35 ₩ 35  
Book value [1] 35 35  
Fair value [1] ₩ 35 ₩ 35  
Young San Heavy Industries Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 74 74  
Ownership [1] 0.11% 0.11%  
Acquisition Cost [1] ₩ 7 ₩ 7  
Book value [1] 7 7  
Fair value [1] ₩ 7 ₩ 7  
Samchungwon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 15 15  
Ownership [1] 0.24% 0.24%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Wooyang Frozen Foods Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 66 66  
Ownership [1] 0.82% 0.82%  
Acquisition Cost [1] ₩ 27 ₩ 27  
Book value [1] 27 27  
Fair value [1] ₩ 27 ₩ 27  
Nanomic Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 94 94  
Ownership [1] 0.63% 0.63%  
Acquisition Cost [1] ₩ 38 ₩ 38  
Book value [1] 38 38  
Fair value [1] ₩ 38 ₩ 38  
Samsung Nonferrous Metal Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 89 89  
Ownership [1] 0.26% 0.26%  
Acquisition Cost [1] ₩ 9 ₩ 9  
Book value [1] 9 9  
Fair value [1] ₩ 9 ₩ 9  
Daewha Fuel Pump Ind., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 83 83  
Ownership [1] 0.05% 0.05%  
Acquisition Cost [1] ₩ 10 ₩ 10  
Book value [1] 10 10  
Fair value [1] ₩ 10 ₩ 10  
Addies Direct Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1 1  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 0 ₩ 0  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
WorldCnM Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 131 131  
Ownership [1] 1.09% 1.09%  
Acquisition Cost [1] ₩ 10 ₩ 10  
Book value [1] 10 10  
Fair value [1] ₩ 10 ₩ 10  
Superone Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,585 1,585  
Ownership [1] 1.45% 1.45%  
Acquisition Cost [1] ₩ 8 ₩ 8  
Book value [1] 8 8  
Fair value [1] ₩ 8 ₩ 8  
Buyoung Panji Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 478 478  
Ownership [1] 0.44% 0.44%  
Acquisition Cost [1] ₩ 12 ₩ 12  
Book value [1] 12 12  
Fair value [1] ₩ 12 ₩ 12  
International Paint Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 111 111  
Ownership [1] 0.48% 0.48%  
Acquisition Cost [1] ₩ 11 ₩ 11  
Book value [1] 11 11  
Fair value [1] ₩ 11 ₩ 11  
EI Lighting Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 358 358  
Ownership [1] 0.36% 0.36%  
Acquisition Cost [1] ₩ 18 ₩ 18  
Book value [1] 18 18  
Fair value [1] ₩ 18 ₩ 18  
Hightech Mnp Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 123 123  
Ownership [1] 0.35% 0.35%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
Yooseung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 10 10  
Ownership [1] 0.08% 0.08%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Sungkwang Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 48 48  
Ownership [1] 0.35% 0.35%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Taeyang gasteel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 8 8  
Ownership [1] 0.02% 0.02%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Ajin KSB Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 204 204  
Ownership [1] 0.31% 0.31%  
Acquisition Cost [1] ₩ 18 ₩ 18  
Book value [1] 18 18  
Fair value [1] ₩ 18 ₩ 18  
Sewon Ceramic Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 530 530  
Ownership [1] 1.01% 1.01%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
Choyang Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 465 465  
Ownership [1] 1.01% 1.01%  
Acquisition Cost [1] ₩ 23 ₩ 23  
Book value [1] 23 23  
Fair value [1] ₩ 23 ₩ 23  
TK Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 307 307  
Ownership [1] 0.70% 0.70%  
Acquisition Cost [1] ₩ 15 ₩ 15  
Book value [1] 15 15  
Fair value [1] ₩ 15 ₩ 15  
Arari Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 14 14  
Ownership [1] 0.05% 0.05%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Potech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   39  
Ownership [1]   0.13%  
Acquisition Cost [1]   ₩ 14  
Book value [1]   14  
Fair value [1]   ₩ 14  
C&S Corporation Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,304 1,304  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 13 ₩ 13  
Book value [1] 13 13  
Fair value [1] ₩ 13 ₩ 13  
Global The One of Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 62 62  
Ownership [1] 0.06% 0.06%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Steellife Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 85 85  
Ownership [1] 0.06% 0.06%  
Acquisition Cost [1] ₩ 4 ₩ 4  
Book value [1] 4 4  
Fair value [1] ₩ 4 ₩ 4  
D&C Castech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 330 330  
Ownership [1] 1.89% 1.89%  
Acquisition Cost [1] ₩ 25 ₩ 25  
Book value [1] 25 25  
Fair value [1] ₩ 25 ₩ 25  
Geumhan Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 498 498  
Ownership [1] 0.24% 0.24%  
Acquisition Cost [1] ₩ 7 ₩ 7  
Book value [1] 7 7  
Fair value [1] ₩ 7 ₩ 7  
Mokgan Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 5 5  
Ownership [1] 0.02% 0.02%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Wenex Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 373 373  
Ownership [1] 0.53% 0.53%  
Acquisition Cost [1] ₩ 19 ₩ 19  
Book value [1] 19 19  
Fair value [1] ₩ 19 ₩ 19  
Sulim Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 30 30  
Ownership [1] 0.20% 0.20%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
Shinkwang Engineering      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 24 24  
Ownership [1] 0.36% 0.36%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Ek Cookware Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 60 60  
Ownership [1] 0.04% 0.04%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
KTTW Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 28 28  
Ownership [1] 0.05% 0.05%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Avajar Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,061 1,061  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Woosung I.B. Co.,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 7,071 7,071  
Ownership [1] 0.07% 0.07%  
Acquisition Cost [1] ₩ 14 ₩ 14  
Book value [1] 14 14  
Fair value [1] ₩ 14 ₩ 14  
CAP Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 16 16  
Ownership [1] 0.30% 0.30%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
MSM Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 25 25  
Ownership [1] 0.08% 0.08%  
Acquisition Cost [1] ₩ 0 ₩ 0  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Ddpopstyle Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 22 22  
Ownership [1] 0.14% 0.14%  
Acquisition Cost [1] ₩ 1 ₩ 0  
Book value [1] 1 0  
Fair value [1] ₩ 1 ₩ 0  
Finemetal Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 49 49  
Ownership [1] 0.08% 0.08%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Sungkyeong Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 52 52  
Ownership [1] 0.24% 0.24%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
RMK Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 63 63  
Ownership [1] 0.90% 0.90%  
Acquisition Cost [1] ₩ 22 ₩ 22  
Book value [1] 22 22  
Fair value [1] ₩ 22 ₩ 22  
Tpp Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   36,645  
Ownership [1]   11.72%  
Acquisition Cost [1]   ₩ 1,832  
Book value [1]   1,832  
Fair value [1]   ₩ 1,832  
Dukeong Metal Heat Treatment Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   843  
Ownership [1]   3.61%  
Acquisition Cost [1]   ₩ 84  
Book value [1]   84  
Fair value [1]   ₩ 84  
Newko Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 331 331  
Ownership [1] 0.06% 0.06%  
Acquisition Cost [1] ₩ 10 ₩ 10  
Book value [1] 10 10  
Fair value [1] ₩ 10 ₩ 10  
KMC&R Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   16  
Ownership [1]   0.11%  
Acquisition Cost [1]   ₩ 1  
Book value [1]   1  
Fair value [1]   ₩ 1  
Dongsung Mulsan Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 137 137  
Ownership [1] 0.34% 0.34%  
Acquisition Cost [1] ₩ 14 ₩ 14  
Book value [1] 14 14  
Fair value [1] ₩ 14 ₩ 14  
Pizzakorea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 42 42  
Ownership [1] 0.18% 0.18%  
Acquisition Cost [1] ₩ 9 ₩ 9  
Book value [1] 9 9  
Fair value [1] ₩ 9 ₩ 9  
Geumdani Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 2,377 2,377  
Ownership [1] 1.82% 1.82%  
Acquisition Cost [1] ₩ 36 ₩ 36  
Book value [1] 36 36  
Fair value [1] ₩ 36 ₩ 36  
Mezzanine I-pack Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 38 38  
Ownership [1] 0.02% 0.02%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Ltop Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 36 36  
Ownership [1] 0.06% 0.06%  
Acquisition Cost [1] ₩ 7 ₩ 7  
Book value [1] 7 7  
Fair value [1] ₩ 7 ₩ 7  
Simile Aluminium Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 428 428  
Ownership [1] 0.31% 0.31%  
Acquisition Cost [1] ₩ 9 ₩ 9  
Book value [1] 9 9  
Fair value [1] ₩ 9 ₩ 9  
GT Tooling Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 604 604  
Ownership [1] 0.17% 0.17%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
Panax Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   4,782  
Ownership [1]   0.37%  
Acquisition Cost [1]   ₩ 24  
Book value [1]   24  
Fair value [1]   ₩ 24  
Team Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 4,782    
Ownership [1] 0.37%    
Acquisition Cost [1] ₩ 24    
Book value [1] 24    
Fair value [1] ₩ 24    
Donghwa TCA Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,012 1,012  
Ownership [1] 0.30% 0.30%  
Acquisition Cost [1] ₩ 25 ₩ 25  
Book value [1] 25 25  
Fair value [1] ₩ 25 ₩ 25  
Hankook Piaget Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 4 4  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Coco Food Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 648 648  
Ownership [1] 1.24% 1.24%  
Acquisition Cost [1] ₩ 33 ₩ 33  
Book value [1] 33 33  
Fair value [1] ₩ 33 ₩ 33  
Woori Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 102 102  
Ownership [1] 1.05% 1.05%  
Acquisition Cost [1] ₩ 21 ₩ 21  
Book value [1] 21 21  
Fair value [1] ₩ 21 ₩ 21  
Ssangyong Youngweol Plant Service&Engineering Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 83 83  
Ownership [1] 0.07% 0.07%  
Acquisition Cost [1] ₩ 4 ₩ 4  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
SH Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 39 39  
Ownership [1] 0.20% 0.20%  
Acquisition Cost [1] ₩ 8 ₩ 8  
Book value [1] 8 8  
Fair value [1] ₩ 8 ₩ 8  
Namsunnam Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   1,275  
Ownership [1]   0.19%  
Acquisition Cost [1]   ₩ 6  
Book value [1]   1  
Fair value [1]   ₩ 1  
Daeyoung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 75 75  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 8 ₩ 8  
Book value [1] 8 8  
Fair value [1] ₩ 8 ₩ 8  
Chandown Food Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 46 46  
Ownership [1] 0.14% 0.14%  
Acquisition Cost [1] ₩ 9 ₩ 9  
Book value [1] 9 9  
Fair value [1] ₩ 9 ₩ 9  
Getron Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 7,259 7,259  
Ownership [1] 0.20% 0.20%  
Acquisition Cost [1] ₩ 37 ₩ 37  
Book value [1] 4 4  
Fair value [1] ₩ 4 ₩ 4  
Jungmun Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 19 19  
Ownership [1] 0.26% 0.26%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Andong Trading Corporation Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 42 42  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
JM Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 403 403  
Ownership [1] 0.67% 0.67%  
Acquisition Cost [1] ₩ 82 ₩ 82  
Book value [1] 10 10  
Fair value [1] ₩ 10 ₩ 10  
SGC Energy Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 580,000 580,000  
Ownership [1] 5.00% 5.00%  
Acquisition Cost [1] ₩ 2,900 ₩ 2,900  
Book value [1] 7,856 2,900  
Fair value [1] ₩ 7,856 ₩ 2,900  
Le Soleil KHNP LLC      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 137,600 137,600  
Ownership [1] 19.00% 19.00%  
Acquisition Cost [1] ₩ 1,376 ₩ 1,376  
Book value [1] 1,376 1,376  
Fair value [1] ₩ 1,376 ₩ 1,376  
Ihsung CNI Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 127,660 127,660  
Ownership [1] 4.30% 4.30%  
Acquisition Cost [1] ₩ 1,500 ₩ 1,500  
Book value [1] 2,016 2,618  
Fair value [1] ₩ 2,016 ₩ 2,618  
H Robotics Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 903,601 903,601  
Ownership [1] 8.05% 8.05%  
Acquisition Cost [1] ₩ 4,000 ₩ 4,000  
Book value [1] 5,638 5,639  
Fair value [1] ₩ 5,638 ₩ 5,639  
Good Tcells Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 11,364 11,364  
Ownership [1] 0.34% 0.34%  
Acquisition Cost [1] ₩ 500 ₩ 500  
Book value [1] 347 457  
Fair value [1] ₩ 347 ₩ 457  
IPS Bio Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,975 1,975  
Ownership [1] 3.13% 3.13%  
Acquisition Cost [1] ₩ 1,000 ₩ 1,000  
Book value [1] 843 1,000  
Fair value [1] ₩ 843 ₩ 1,000  
Nine B Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 5,000 5,000  
Ownership [1] 4.96% 4.96%  
Acquisition Cost [1] ₩ 1,000 ₩ 1,000  
Book value [1] 1,000 1,000  
Fair value [1] ₩ 1,000 ₩ 1,000  
Choigang-gujo Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 61 61  
Ownership [1] 0.45% 0.45%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
DS Cotec Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   973  
Ownership [1]   0.71%  
Acquisition Cost [1]   ₩ 15  
Book value [1]   5  
Fair value [1]   ₩ 5  
Youngheung Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 101 101  
Ownership [1] 0.05% 0.05%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Hosungsteel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 323 323  
Ownership [1] 0.26% 0.26%  
Acquisition Cost [1] ₩ 14 ₩ 14  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Uktae IND. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 140 140  
Ownership [1] 0.12% 0.12%  
Acquisition Cost [1] ₩ 7 ₩ 7  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Gangdong R&S Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   69  
Ownership [1]   1.25%  
Acquisition Cost [1]   ₩ 1  
Book value [1]   1  
Fair value [1]   ₩ 1  
JFC Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 16 16  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Seokjin E&T Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   81  
Ownership [1]   0.06%  
Acquisition Cost [1]   ₩ 8  
Book value [1]   8  
Fair value [1]   ₩ 8  
Hyundai Tech Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 28 28  
Ownership [1] 0.69% 0.69%  
Acquisition Cost [1] ₩ 10 ₩ 10  
Book value [1] 10 10  
Fair value [1] ₩ 10 ₩ 10  
Daeil Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 301 301  
Ownership [1] 0.42% 0.42%  
Acquisition Cost [1] ₩ 15 ₩ 15  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Seohan Food Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 83 83  
Ownership [1] 0.19% 0.19%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Daehyeon Recycle Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 59 59  
Ownership [1] 0.61% 0.61%  
Acquisition Cost [1] ₩ 12 ₩ 12  
Book value [1] 12 12  
Fair value [1] ₩ 12 ₩ 12  
Metal Link Inc. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 709 709  
Ownership [1] 0.17% 0.17%  
Acquisition Cost [1] ₩ 35 ₩ 35  
Book value [1] 4 4  
Fair value [1] ₩ 4 ₩ 4  
Pipetec Korea Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 50 50  
Ownership [1] 0.07% 0.07%  
Acquisition Cost [1] ₩ 10 ₩ 10  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
SungJin Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 803 803  
Ownership [1] 1.20% 1.20%  
Acquisition Cost [1] ₩ 24 ₩ 24  
Book value [1] 8 8  
Fair value [1] ₩ 8 ₩ 8  
Yujin E&C Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 29 29  
Ownership [1] 0.18% 0.18%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Daishin Logistics Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 13 13  
Ownership [1] 0.09% 0.09%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
JinSung Engineering Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 18 18  
Ownership [1] 0.30% 0.30%  
Acquisition Cost [1] ₩ 18 ₩ 18  
Book value [1] 18 18  
Fair value [1] ₩ 18 ₩ 18  
Yongho Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 157 157  
Ownership [1] 0.22% 0.22%  
Acquisition Cost [1] ₩ 32 ₩ 32  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Wow tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 369 369  
Ownership [1] 0.75% 0.75%  
Acquisition Cost [1] ₩ 11 ₩ 11  
Book value [1] 11 11  
Fair value [1] ₩ 11 ₩ 11  
World Power Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 16 16  
Ownership [1] 0.28% 0.28%  
Acquisition Cost [1] ₩ 24 ₩ 24  
Book value [1] 24 24  
Fair value [1] ₩ 24 ₩ 24  
PBM Auto Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,001 1,001  
Ownership [1] 1.06% 1.06%  
Acquisition Cost [1] ₩ 10 ₩ 10  
Book value [1] 10 10  
Fair value [1] ₩ 10 ₩ 10  
K2 Motors Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 54 54  
Ownership [1] 0.28% 0.28%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
CL Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 801 801  
Ownership [1] 2.25% 2.25%  
Acquisition Cost [1] ₩ 40 ₩ 40  
Book value [1] 40 40  
Fair value [1] ₩ 40 ₩ 40  
Mirae Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 39 39  
Ownership [1] 0.04% 0.04%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
Gentak Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 301 301  
Ownership [1] 0.31% 0.31%  
Acquisition Cost [1] ₩ 8 ₩ 8  
Book value [1] 8 8  
Fair value [1] ₩ 8 ₩ 8  
Sungjin Chemical Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 118 118  
Ownership [1] 0.36% 0.36%  
Acquisition Cost [1] ₩ 4 ₩ 4  
Book value [1] 4 4  
Fair value [1] ₩ 4 ₩ 4  
LMAT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 198 198  
Ownership [1] 0.04% 0.04%  
Acquisition Cost [1] ₩ 20 ₩ 20  
Book value [1] 20 20  
Fair value [1] ₩ 20 ₩ 20  
Poong Lim Industrial Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 25 25  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 38 ₩ 38  
Book value [1] 38 38  
Fair value [1] ₩ 38 ₩ 38  
Dae Sung GeoTech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 631 631  
Ownership [1] 1.28% 1.28%  
Acquisition Cost [1] ₩ 32 ₩ 32  
Book value [1] 32 32  
Fair value [1] ₩ 32 ₩ 32  
Saeheemang Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 756 756  
Ownership [1] 0.60% 0.60%  
Acquisition Cost [1] ₩ 15 ₩ 15  
Book value [1] 15 15  
Fair value [1] ₩ 15 ₩ 15  
Hakbong Precision Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,460 1,460  
Ownership [1] 1.18% 1.18%  
Acquisition Cost [1] ₩ 15 ₩ 15  
Book value [1] 15 15  
Fair value [1] ₩ 15 ₩ 15  
Vornech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 431 431  
Ownership [1] 0.37% 0.37%  
Acquisition Cost [1] ₩ 11 ₩ 11  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Woojin Formtech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 76 76  
Ownership [1] 0.08% 0.08%  
Acquisition Cost [1] ₩ 8 ₩ 8  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Korea Engineer Manufacturing Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 114 114  
Ownership [1] 0.26% 0.26%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Sinwa J&K Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 476 476  
Ownership [1] 0.28% 0.28%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
Owon E&G Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 132 132  
Ownership [1] 0.20% 0.20%  
Acquisition Cost [1] ₩ 4 ₩ 4  
Book value [1] 4 4  
Fair value [1] ₩ 4 ₩ 4  
Guseong Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 141 141  
Ownership [1] 0.20% 0.20%  
Acquisition Cost [1] ₩ 3 ₩ 4  
Book value [1] 3 4  
Fair value [1] ₩ 3 ₩ 4  
Irefarm Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 45 45  
Ownership [1] 0.30% 0.30%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Nam-hae E&C Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 117 117  
Ownership [1] 0.10% 0.10%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Haenarae Agricultural Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 15 15  
Ownership [1] 0.03% 0.03%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Ja Yeon Science Ind. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   10  
Ownership [1]   0.05%  
Acquisition Cost [1]   ₩ 2  
Book value [1]   2  
Fair value [1]   ₩ 2  
DECO&E Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,261 1,261  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Design Beyond Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 17 17  
Ownership [1] 0.19% 0.19%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
LBK Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 8 8  
Ownership [1] 0.05% 0.05%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Duckwon industrial Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 32 32  
Ownership [1] 0.43% 0.43%  
Acquisition Cost [1] ₩ 13 ₩ 13  
Book value [1] 13 13  
Fair value [1] ₩ 13 ₩ 13  
ASPT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 64 64  
Ownership [1] 0.82% 0.82%  
Acquisition Cost [1] ₩ 19 ₩ 19  
Book value [1] 19 19  
Fair value [1] ₩ 19 ₩ 19  
SIMA Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 29 29  
Ownership [1] 0.05% 0.05%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Jingkang Resources Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 90 90  
Ownership [1] 1.57% 1.57%  
Acquisition Cost [1] ₩ 13 ₩ 13  
Book value [1] 13 13  
Fair value [1] ₩ 13 ₩ 13  
Eslin Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 39 39  
Ownership [1] 0.14% 0.14%  
Acquisition Cost [1] ₩ 8 ₩ 8  
Book value [1] 8 8  
Fair value [1] ₩ 8 ₩ 8  
Shinwon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 275 275  
Ownership [1] 0.42% 0.42%  
Acquisition Cost [1] ₩ 19 ₩ 19  
Book value [1] 19 19  
Fair value [1] ₩ 19 ₩ 19  
CIC Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 96 96  
Ownership [1] 0.54% 0.54%  
Acquisition Cost [1] ₩ 10 ₩ 10  
Book value [1] 10 10  
Fair value [1] ₩ 10 ₩ 10  
Orano Expansion      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 5,742,405 5,742,405  
Ownership [1] 4.72% 4.72%  
Acquisition Cost [1] ₩ 0 ₩ 0  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Fourever Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 44 44  
Ownership [1] 0.10% 0.10%  
Acquisition Cost [1] ₩ 4 ₩ 4  
Book value [1] 4 4  
Fair value [1] ₩ 4 ₩ 4  
Segyo Hitech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   156  
Ownership [1]   0.24%  
Acquisition Cost [1]   ₩ 8  
Book value [1]   8  
Fair value [1]   ₩ 8  
Myungil Metal Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 80 80  
Ownership [1] 0.10% 0.10%  
Acquisition Cost [1] ₩ 4 ₩ 4  
Book value [1] 4 4  
Fair value [1] ₩ 4 ₩ 4  
Daeshin ECM Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 182 182  
Ownership [1] 0.30% 0.30%  
Acquisition Cost [1] ₩ 9 ₩ 9  
Book value [1] 9 9  
Fair value [1] ₩ 9 ₩ 9  
Greencarbon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 79 79  
Ownership [1] 0.06% 0.06%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Sunkoo Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 4 4  
Ownership [1] 0.10% 0.10%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Jians Construction Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 45 13  
Ownership [1] 0.01% 0.00%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 4 2  
Fair value [1] ₩ 4 ₩ 2  
DH trading Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 891 891  
Ownership [1] 0.04% 0.04%  
Acquisition Cost [1] ₩ 178 ₩ 178  
Book value [1] 0 178  
Fair value [1] ₩ 0 ₩ 178  
Diotech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   2,186  
Ownership [1]   2.84%  
Acquisition Cost [1]   ₩ 219  
Book value [1]   219  
Fair value [1]   ₩ 219  
Sangsin Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 29 29  
Ownership [1] 0.09% 0.09%  
Acquisition Cost [1] ₩ 15 ₩ 15  
Book value [1] 15 15  
Fair value [1] ₩ 15 ₩ 15  
Steel focus Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 154 154  
Ownership [1] 0.20% 0.20%  
Acquisition Cost [1] ₩ 4 ₩ 4  
Book value [1] 4 4  
Fair value [1] ₩ 4 ₩ 4  
Kamada Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 437 437  
Ownership [1] 0.33% 0.33%  
Acquisition Cost [1] ₩ 22 ₩ 22  
Book value [1] 22 22  
Fair value [1] ₩ 22 ₩ 22  
Fosys Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 19 19  
Ownership [1] 0.08% 0.08%  
Acquisition Cost [1] ₩ 4 ₩ 4  
Book value [1] 4 4  
Fair value [1] ₩ 4 ₩ 4  
GB precision Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 137 137  
Ownership [1] 0.57% 0.57%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Ewon Art Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 185 185  
Ownership [1] 0.61% 0.61%  
Acquisition Cost [1] ₩ 9 ₩ 9  
Book value [1] 9 9  
Fair value [1] ₩ 9 ₩ 9  
DI Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 3 3  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 0 ₩ 0  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Hans AD Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 33 33  
Ownership [1] 0.35% 0.35%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Chaegim Environment Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 158 158  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Daesung Stain Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 32 32  
Ownership [1] 0.32% 0.32%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
YSM Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 281 281  
Ownership [1] 2.07% 2.07%  
Acquisition Cost [1] ₩ 14 ₩ 14  
Book value [1] 14 14  
Fair value [1] ₩ 14 ₩ 14  
Dong In Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 65 65  
Ownership [1] 0.13% 0.13%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
U&I Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 50 50  
Ownership [1] 0.22% 0.22%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
World One Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 401 401  
Ownership [1] 0.58% 0.58%  
Acquisition Cost [1] ₩ 10 ₩ 10  
Book value [1] 10 10  
Fair value [1] ₩ 10 ₩ 10  
Yewon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 24 24  
Ownership [1] 0.02% 0.02%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Seeun P&P Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   163  
Ownership [1]   0.48%  
Acquisition Cost [1]   ₩ 33  
Book value [1]   33  
Fair value [1]   ₩ 33  
TSNT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 119 119  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 24 ₩ 24  
Book value [1] 24 24  
Fair value [1] ₩ 24 ₩ 24  
Shinsung Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 314 314  
Ownership [1] 0.01% 0.01%  
Acquisition Cost [1] ₩ 16 ₩ 16  
Book value [1] 16 16  
Fair value [1] ₩ 16 ₩ 16  
JSL Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 51 51  
Ownership [1] 0.49% 0.49%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Loft Garden Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1 1  
Ownership [1] 0.04% 0.04%  
Acquisition Cost [1] ₩ 0 ₩ 0  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Handon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 74 74  
Ownership [1] 0.25% 0.25%  
Acquisition Cost [1] ₩ 11 ₩ 11  
Book value [1] 11 11  
Fair value [1] ₩ 11 ₩ 11  
GH Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 82 82  
Ownership [1] 0.22% 0.22%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Daeo Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 13 13  
Ownership [1] 0.23% 0.23%  
Acquisition Cost [1] ₩ 4 ₩ 4  
Book value [1] 4 4  
Fair value [1] ₩ 4 ₩ 4  
Bokwang Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 76 76  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 15 ₩ 15  
Book value [1] 15 15  
Fair value [1] ₩ 15 ₩ 15  
Samkum Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 201 201  
Ownership [1] 0.48% 0.48%  
Acquisition Cost [1] ₩ 40 ₩ 40  
Book value [1] 40 40  
Fair value [1] ₩ 40 ₩ 40  
Dyntex Korea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 75 75  
Ownership [1] 0.28% 0.28%  
Acquisition Cost [1] ₩ 15 ₩ 15  
Book value [1] 15 15  
Fair value [1] ₩ 15 ₩ 15  
IGSP Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   17,662  
Ownership [1]   0.21%  
Acquisition Cost [1]   ₩ 18  
Book value [1]   18  
Fair value [1]   ₩ 18  
Mirae Engineering Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 66 66  
Ownership [1] 0.15% 0.15%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Mideumeul-juneun-namu Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 119 119  
Ownership [1] 0.53% 0.53%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
Leagis Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   829  
Ownership [1]   1.38%  
Acquisition Cost [1]   ₩ 66  
Book value [1]   66  
Fair value [1]   ₩ 66  
Seil Textile Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 16 16  
Ownership [1] 0.15% 0.15%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Ilshin Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 36 36  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 7 ₩ 7  
Book value [1] 7 7  
Fair value [1] ₩ 7 ₩ 7  
Magtec Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 28 28  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 6 ₩ 6  
Book value [1] 6 6  
Fair value [1] ₩ 6 ₩ 6  
Sukwon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 2,885 2,885  
Ownership [1] 0.59% 0.59%  
Acquisition Cost [1] ₩ 29 ₩ 29  
Book value [1] 29 29  
Fair value [1] ₩ 29 ₩ 29  
Hae-sung Metal Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 159 159  
Ownership [1] 0.17% 0.17%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
White&Clean Foods Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 330 330  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Michang Cable Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,096 861  
Ownership [1] 0.26% 0.13%  
Acquisition Cost [1] ₩ 16 ₩ 4  
Book value [1] 16 4  
Fair value [1] ₩ 16 ₩ 4  
G.M Foods Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 57 57  
Ownership [1] 0.16% 0.16%  
Acquisition Cost [1] ₩ 9 ₩ 9  
Book value [1] 9 9  
Fair value [1] ₩ 9 ₩ 9  
Wecan Global Inc. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 165 165  
Ownership [1] 0.08% 0.08%  
Acquisition Cost [1] ₩ 8 ₩ 8  
Book value [1] 8 8  
Fair value [1] ₩ 8 ₩ 8  
Daeju Steel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 11 11  
Ownership [1] 0.20% 0.20%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
Hyundai Glass Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 860 860  
Ownership [1] 0.83% 0.83%  
Acquisition Cost [1] ₩ 43 ₩ 43  
Book value [1] 43 43  
Fair value [1] ₩ 43 ₩ 43  
MEC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 16,468 16,468  
Ownership [1] 1.17% 1.17%  
Acquisition Cost [1] ₩ 41 ₩ 41  
Book value [1] 41 41  
Fair value [1] ₩ 41 ₩ 41  
Daeyeoneco Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 151 151  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 15 ₩ 15  
Book value [1] 15 15  
Fair value [1] ₩ 15 ₩ 15  
Hyesung Cable&Communication Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 762 762  
Ownership [1] 0.39% 0.39%  
Acquisition Cost [1] ₩ 38 ₩ 38  
Book value [1] 38 38  
Fair value [1] ₩ 38 ₩ 38  
Sangjin Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 428 428  
Ownership [1] 0.35% 0.35%  
Acquisition Cost [1] ₩ 21 ₩ 21  
Book value [1] 21 21  
Fair value [1] ₩ 21 ₩ 21  
Topis Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 246 246  
Ownership [1] 0.71% 0.71%  
Acquisition Cost [1] ₩ 14 ₩ 14  
Book value [1] 14 14  
Fair value [1] ₩ 14 ₩ 14  
G & L Tech Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 2 2  
Ownership [1] 0.06% 0.06%  
Acquisition Cost [1] ₩ 0 ₩ 0  
Book value [1] 0 0  
Fair value [1] ₩ 0 ₩ 0  
Cheonhae Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 72 72  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Iksan-guwon Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 563 563  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 11 ₩ 11  
Book value [1] 11 11  
Fair value [1] ₩ 11 ₩ 11  
Korea Remicon Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 36 36  
Ownership [1] 0.03% 0.03%  
Acquisition Cost [1] ₩ 5 ₩ 5  
Book value [1] 5 5  
Fair value [1] ₩ 5 ₩ 5  
New Tech Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 23 23  
Ownership [1] 0.15% 0.15%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
Segeon Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 124 124  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 4 ₩ 4  
Book value [1] 4 4  
Fair value [1] ₩ 4 ₩ 4  
MS Tech Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 9 9  
Ownership [1] 0.15% 0.15%  
Acquisition Cost [1] ₩ 1 ₩ 1  
Book value [1] 1 1  
Fair value [1] ₩ 1 ₩ 1  
J.I Steel Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 21 21  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 2 ₩ 2  
Book value [1] 2 2  
Fair value [1] ₩ 2 ₩ 2  
HNT Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 172 172  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 9 ₩ 9  
Book value [1] 9 9  
Fair value [1] ₩ 9 ₩ 9  
Taejin Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 27 27  
Ownership [1] 0.08% 0.08%  
Acquisition Cost [1] ₩ 3 ₩ 3  
Book value [1] 3 3  
Fair value [1] ₩ 3 ₩ 3  
Macroad Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 953 953  
Ownership [1] 0.17% 0.17%  
Acquisition Cost [1] ₩ 10 ₩ 10  
Book value [1] 10 10  
Fair value [1] ₩ 10 ₩ 10  
Jinsung Electronics Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1]   69  
Ownership [1]   1.41%  
Acquisition Cost [1]   ₩ 14  
Book value [1]   14  
Fair value [1]   ₩ 14  
Woongjin Energy Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 94 94  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 9 ₩ 9  
Book value [1] 9 9  
Fair value [1] ₩ 9 ₩ 9  
Electric Contractors' Financial Cooperative Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 0 0  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 39 ₩ 38  
Book value [1] 39 38  
Fair value [1] ₩ 39 ₩ 38  
Information&Communication Financial Cooperative Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 0 0  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 15 ₩ 15  
Book value [1] 15 15  
Fair value [1] ₩ 15 ₩ 15  
Common Computer Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 3,856 3,856  
Ownership [1] 1.87% 1.87%  
Acquisition Cost [1] ₩ 1,000 ₩ 1,000  
Book value [1] 1,000 1,000  
Fair value [1] ₩ 1,000 ₩ 1,000  
Fine Powerex Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 72,633 72,633  
Ownership [1] 4.92% 4.92%  
Acquisition Cost [1] ₩ 1,500 ₩ 1,500  
Book value [1] 1,500 1,500  
Fair value [1] ₩ 1,500 ₩ 1,500  
Aron Flying Ship Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 0 0  
Ownership [1] 0.00% 0.00%  
Acquisition Cost [1] ₩ 500 ₩ 500  
Book value [1] 529 491  
Fair value [1] ₩ 529 ₩ 491  
Altron Jeonju Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 34,846    
Ownership [1] 1.34%    
Acquisition Cost [1] ₩ 697    
Book value [1] 5    
Fair value [1] ₩ 5    
Eunsung Industrial Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 3    
Ownership [1] 0.03%    
Acquisition Cost [1] ₩ 1    
Book value [1] 1    
Fair value [1] ₩ 1    
KPE Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 51    
Ownership [1] 0.19%    
Acquisition Cost [1] ₩ 13    
Book value [1] 13    
Fair value [1] ₩ 13    
Dongbangfarms Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 904    
Ownership [1] 0.55%    
Acquisition Cost [1] ₩ 41    
Book value [1] 5    
Fair value [1] ₩ 5    
Sungdo Pack Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 15    
Ownership [1] 0.06%    
Acquisition Cost [1] ₩ 1    
Book value [1] 1    
Fair value [1] ₩ 1    
Coffeenie Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 2    
Ownership [1] 0.00%    
Acquisition Cost [1] ₩ 1    
Book value [1] 1    
Fair value [1] ₩ 1    
Medi Pharma Plan Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,075    
Ownership [1] 0.26%    
Acquisition Cost [1] ₩ 108    
Book value [1] 8    
Fair value [1] ₩ 8    
Woori Ascon Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 25    
Ownership [1] 0.34%    
Acquisition Cost [1] ₩ 10    
Book value [1] 10    
Fair value [1] ₩ 10    
Dong Shin Hydraulies Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 9,460    
Ownership [1] 0.14%    
Acquisition Cost [1] ₩ 47    
Book value [1] 47    
Fair value [1] ₩ 47    
Cheonwoo E.P.S Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 371    
Ownership [1] 1.10%    
Acquisition Cost [1] ₩ 19    
Book value [1] 19    
Fair value [1] ₩ 19    
Koa Tech Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,244    
Ownership [1] 0.77%    
Acquisition Cost [1] ₩ 12    
Book value [1] 12    
Fair value [1] ₩ 12    
Jinwoo Textile Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 91    
Ownership [1] 0.68%    
Acquisition Cost [1] ₩ 9    
Book value [1] 9    
Fair value [1] ₩ 9    
SKE Cable Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 120    
Ownership [1] 0.08%    
Acquisition Cost [1] ₩ 6    
Book value [1] 6    
Fair value [1] ₩ 6    
Hi Korea Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,845    
Ownership [1] 1.94%    
Acquisition Cost [1] ₩ 185    
Book value [1] 185    
Fair value [1] ₩ 185    
Daeheung Engineering Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 65    
Ownership [1] 0.01%    
Acquisition Cost [1] ₩ 1    
Book value [1] 1    
Fair value [1] ₩ 1    
Etapol Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,361    
Ownership [1] 0.54%    
Acquisition Cost [1] ₩ 41    
Book value [1] 41    
Fair value [1] ₩ 41    
Yoongwon International Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 157    
Ownership [1] 1.47%    
Acquisition Cost [1] ₩ 31    
Book value [1] 31    
Fair value [1] ₩ 31    
Avoh CeramicBath Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 173    
Ownership [1] 0.14%    
Acquisition Cost [1] ₩ 3    
Book value [1] 3    
Fair value [1] ₩ 3    
Dongyang R.P.F. Industrial Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 59    
Ownership [1] 0.03%    
Acquisition Cost [1] ₩ 2    
Book value [1] 2    
Fair value [1] ₩ 2    
Yuil Engineering Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 14    
Ownership [1] 0.03%    
Acquisition Cost [1] ₩ 1    
Book value [1] 1    
Fair value [1] ₩ 1    
Taesan Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 146    
Ownership [1] 0.69%    
Acquisition Cost [1] ₩ 35    
Book value [1] 35    
Fair value [1] ₩ 35    
Jico Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 10,581    
Ownership [1] 0.01%    
Acquisition Cost [1] ₩ 26    
Book value [1] 26    
Fair value [1] ₩ 26    
K Shipbuilding Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 8,622    
Ownership [1] 0.25%    
Acquisition Cost [1] ₩ 1,078    
Book value [1] 1,078    
Fair value [1] ₩ 1,078    
Seokjin ET Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 81    
Ownership [1] 0.06%    
Acquisition Cost [1] ₩ 8    
Book value [1] 8    
Fair value [1] ₩ 8    
Agencore Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 104,350    
Ownership [1] 5.67%    
Acquisition Cost [1] ₩ 1,200    
Book value [1] 1,200    
Fair value [1] ₩ 1,200    
SamHong Machinery. EMC Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 476,192    
Ownership [1] 19.23%    
Acquisition Cost [1] ₩ 5,000    
Book value [1] 5,000    
Fair value [1] ₩ 5,000    
Thermo Tec Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 446    
Ownership [1] 0.03%    
Acquisition Cost [1] ₩ 4    
Book value [1] 4    
Fair value [1] ₩ 4    
DaeYang Hydro Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 6    
Ownership [1] 0.02%    
Acquisition Cost [1] ₩ 1    
Book value [1] 1    
Fair value [1] ₩ 1    
SangMoo Steel Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 24    
Ownership [1] 0.04%    
Acquisition Cost [1] ₩ 2    
Book value [1] 2    
Fair value [1] ₩ 2    
Jungin Distribution Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 17    
Ownership [1] 0.00%    
Acquisition Cost [1] ₩ 3    
Book value [1] 3    
Fair value [1] ₩ 3    
TheSun Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 77    
Ownership [1] 0.06%    
Acquisition Cost [1] ₩ 1    
Book value [1] 1    
Fair value [1] ₩ 1    
Daedong Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 176    
Ownership [1] 0.33%    
Acquisition Cost [1] ₩ 18    
Book value [1] 18    
Fair value [1] ₩ 18    
Daewoong and Technology Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 423    
Ownership [1] 1.14%    
Acquisition Cost [1] ₩ 42    
Book value [1] 42    
Fair value [1] ₩ 42    
Ebadom Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 361    
Ownership [1] 0.21%    
Acquisition Cost [1] ₩ 58    
Book value [1] 58    
Fair value [1] ₩ 58    
ChoungHwa Precise Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 428    
Ownership [1] 0.08%    
Acquisition Cost [1] ₩ 43    
Book value [1] 4    
Fair value [1] ₩ 4    
Snopa Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 458    
Ownership [1] 0.01%    
Acquisition Cost [1] ₩ 5    
Book value [1] 5    
Fair value [1] ₩ 5    
Aloha Factory Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 2,970    
Ownership [1] 3.61%    
Acquisition Cost [1] ₩ 1,000    
Book value [1] 1,000    
Fair value [1] ₩ 1,000    
Dailyshot Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 339    
Ownership [1] 1.85%    
Acquisition Cost [1] ₩ 1,001    
Book value [1] 1,001    
Fair value [1] ₩ 1,001    
Mediquitous Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 5,080    
Ownership [1] 0.69%    
Acquisition Cost [1] ₩ 1,250    
Book value [1] 1,250    
Fair value [1] ₩ 1,250    
SKD Korea Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 40    
Ownership [1] 0.28%    
Acquisition Cost [1] ₩ 20    
Book value [1] 20    
Fair value [1] ₩ 20    
Samhyup Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 376    
Ownership [1] 0.91%    
Acquisition Cost [1] ₩ 38    
Book value [1] 38    
Fair value [1] ₩ 38    
Gogang Aluminum Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 828    
Ownership [1] 1.52%    
Acquisition Cost [1] ₩ 41    
Book value [1] 41    
Fair value [1] ₩ 41    
Taekwang Paper Board Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 133    
Ownership [1] 0.49%    
Acquisition Cost [1] ₩ 23    
Book value [1] 23    
Fair value [1] ₩ 23    
NY Tech Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 33    
Ownership [1] 0.15%    
Acquisition Cost [1] ₩ 2    
Book value [1] 2    
Fair value [1] ₩ 2    
Sekwang Precision Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 394    
Ownership [1] 0.84%    
Acquisition Cost [1] ₩ 79    
Book value [1] 79    
Fair value [1] ₩ 79    
Dongbang Metal Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,985    
Ownership [1] 0.32%    
Acquisition Cost [1] ₩ 20    
Book value [1] 20    
Fair value [1] ₩ 20    
Samwang Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 170    
Ownership [1] 0.25%    
Acquisition Cost [1] ₩ 17    
Book value [1] 17    
Fair value [1] ₩ 17    
Yurim CNF Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 15    
Ownership [1] 0.23%    
Acquisition Cost [1] ₩ 2    
Book value [1] 2    
Fair value [1] ₩ 2    
Guseul Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 89    
Ownership [1] 0.23%    
Acquisition Cost [1] ₩ 9    
Book value [1] 9    
Fair value [1] ₩ 9    
Gaone International Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 54    
Ownership [1] 0.29%    
Acquisition Cost [1] ₩ 14    
Book value [1] 14    
Fair value [1] ₩ 14    
Daekwang Forging Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 1,298    
Ownership [1] 1.99%    
Acquisition Cost [1] ₩ 130    
Book value [1] 130    
Fair value [1] ₩ 130    
Dongyang Pratech Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 265    
Ownership [1] 1.21%    
Acquisition Cost [1] ₩ 29    
Book value [1] 29    
Fair value [1] ₩ 29    
Samjin Placo Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 661    
Ownership [1] 0.52%    
Acquisition Cost [1] ₩ 33    
Book value [1] 33    
Fair value [1] ₩ 33    
MS Steel Industrial Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 167    
Ownership [1] 0.40%    
Acquisition Cost [1] ₩ 8    
Book value [1] 8    
Fair value [1] ₩ 8    
STS Global Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 9    
Ownership [1] 0.04%    
Acquisition Cost [1] ₩ 1    
Book value [1] 1    
Fair value [1] ₩ 1    
Y Tech Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 855    
Ownership [1] 0.65%    
Acquisition Cost [1] ₩ 34    
Book value [1] 34    
Fair value [1] ₩ 34    
CK Industry Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 4,178    
Ownership [1] 7.54%    
Acquisition Cost [1] ₩ 167    
Book value [1] 167    
Fair value [1] ₩ 167    
JJ Tech Co.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 14    
Ownership [1] 0.22%    
Acquisition Cost [1] ₩ 1    
Book value [1] 1    
Fair value [1] ₩ 1    
Shield Board Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 165    
Ownership [1] 0.15%    
Acquisition Cost [1] ₩ 3    
Book value [1] 3    
Fair value [1] ₩ 3    
SFC International Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 11    
Ownership [1] 0.01%    
Acquisition Cost [1] ₩ 1    
Book value [1] 1    
Fair value [1] ₩ 1    
Korea Ocean Machinery Technology Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 763    
Ownership [1] 0.45%    
Acquisition Cost [1] ₩ 76    
Book value [1] 76    
Fair value [1] ₩ 76    
Hana ITM Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 8,443    
Ownership [1] 0.70%    
Acquisition Cost [1] ₩ 84    
Book value [1] 84    
Fair value [1] ₩ 84    
Jeuvis Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 191    
Ownership [1] 0.30%    
Acquisition Cost [1] ₩ 2    
Book value [1] 2    
Fair value [1] ₩ 2    
JBM Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 662    
Ownership [1] 0.34%    
Acquisition Cost [1] ₩ 20    
Book value [1] 20    
Fair value [1] ₩ 20    
Jungwoo Metal Solution Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 27    
Ownership [1] 0.08%    
Acquisition Cost [1] ₩ 2    
Book value [1] 2    
Fair value [1] ₩ 2    
MS Precision Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 220    
Ownership [1] 0.16%    
Acquisition Cost [1] ₩ 22    
Book value [1] 22    
Fair value [1] ₩ 22    
YM Tech Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 2    
Ownership [1] 0.01%    
Acquisition Cost [1] ₩ 1    
Book value [1] 1    
Fair value [1] ₩ 1    
YM Tech Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 439    
Ownership [1] 1.59%    
Acquisition Cost [1] ₩ 22    
Book value [1] 22    
Fair value [1] ₩ 22    
Minjin Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 24    
Ownership [1] 0.01%    
Acquisition Cost [1] ₩ 1    
Book value [1] 1    
Fair value [1] ₩ 1    
Daejoo EG Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 133    
Ownership [1] 0.00%    
Acquisition Cost [1] ₩ 27    
Book value [1] 27    
Fair value [1] ₩ 27    
Taeyoung Precision Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 31    
Ownership [1] 0.22%    
Acquisition Cost [1] ₩ 1    
Book value [1] 1    
Fair value [1] ₩ 1    
Shin Heung Precision Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 93    
Ownership [1] 4.63%    
Acquisition Cost [1] ₩ 4    
Book value [1] 4    
Fair value [1] ₩ 4    
TaeGwang PC Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 530    
Ownership [1] 0.90%    
Acquisition Cost [1] ₩ 13    
Book value [1] 13    
Fair value [1] ₩ 13    
KyeongGwang Tech Co.,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [1] 244    
Ownership [1] 1.04%    
Acquisition Cost [1] ₩ 7    
Book value [1] 7    
Fair value [1] ₩ 7    
[1] 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.
[2] 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.
[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, 2021.