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Financial Assets at Fair Value through Other Comprehensive Income (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Financial assets at fair value through other comprehensive income [Line Items]      
Acquisition Cost ₩ 626,056 ₩ 650,513  
Book value 379,170 399,495 ₩ 0
Fair value 379,170 399,495  
Listed equity securities      
Financial assets at fair value through other comprehensive income [Line Items]      
Acquisition Cost 359,339 365,843  
Book value 201,202 210,056 0
Fair value ₩ 201,202 ₩ 210,056  
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 107,090 129,051  
Fair value ₩ 107,090 ₩ 129,051  
Ssangyong Motor Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 38,568 38,568  
Ownership 0.03% 0.03%  
Acquisition Cost ₩ 428 ₩ 428  
Book value 80 153  
Fair value ₩ 80 ₩ 153  
SM Korea Line Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 18 18  
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 1 1  
Fair value ₩ 1 ₩ 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 52 61  
Fair value ₩ 52 ₩ 61  
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 7 7  
Fair value ₩ 7 ₩ 7  
Dongbu Corporation      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 955 955  
Ownership 0.00% 0.02%  
Acquisition Cost ₩ 12 ₩ 12  
Book value 8 7  
Fair value ₩ 8 ₩ 7  
KSP Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 22,539 22,539  
Ownership 0.06% 0.08%  
Acquisition Cost ₩ 24 ₩ 24  
Book value 40 32  
Fair value ₩ 40 ₩ 32  
STX Heavy Industries Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 8,639 5,057  
Ownership 0.03% 0.13%  
Acquisition Cost ₩ 213 ₩ 191  
Book value 26 29  
Fair value ₩ 26 ₩ 29  
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 ₩ 71,554  
Book value 62,026 44,790  
Fair value ₩ 62,026 ₩ 44,790  
Energy Fuels Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,711,814 1,711,814  
Ownership 1.91% 1.91%  
Acquisition Cost ₩ 16,819 ₩ 16,819  
Book value 3,764 5,435  
Fair value ₩ 3,764 ₩ 5,435  
Bunji Corporation Limited (formerly, Baralaba Coal Company Limited)      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 99,763 99,763  
Ownership 0.07% 0.07%  
Acquisition Cost ₩ 18,445 ₩ 18,445  
Book value 0 0  
Fair value ₩ 0 ₩ 0  
Denison Mines Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 58,284,000 58,284,000  
Ownership 10.42% 10.42%  
Acquisition Cost ₩ 84,134 ₩ 84,134  
Book value 27,903 30,122  
Fair value ₩ 27,903 ₩ 30,122  
Fission 3.0      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 75,000 75,000 [1]  
Ownership 0.14% 0.14% [1]  
Acquisition Cost ₩ 0 ₩ 0 [1]  
Book value 5 13 [1]  
Fair value ₩ 5 ₩ 13 [1]  
Fission Uranium Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 800,000 800,000  
Ownership 0.16% 0.16%  
Acquisition Cost ₩ 785 ₩ 785  
Book value 199 354  
Fair value 199 354  
Unlisted equity securities      
Financial assets at fair value through other comprehensive income [Line Items]      
Acquisition Cost [2] 266,717 284,670  
Book value 177,968 [2] 189,439 [2] ₩ 0
Fair value [2] ₩ 177,968 ₩ 189,439  
Intellectual Discovery, Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,000,000 1,000,000  
Ownership 6.00% 8.81%  
Acquisition Cost ₩ 5,000 ₩ 5,000  
Book value 954 954  
Fair value ₩ 954 ₩ 954  
Hwan Young Steel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 10,916 10,916  
Ownership 0.14% 0.14%  
Acquisition Cost ₩ 1,092 ₩ 1,092  
Book value 97 97  
Fair value ₩ 97 ₩ 97  
SAMBO AUTO. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 15,066 15,066  
Ownership 0.02% 0.02%  
Acquisition Cost ₩ 38 ₩ 38  
Book value 38 38  
Fair value ₩ 38 ₩ 38  
Mobo Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 504 504  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 14 ₩ 14  
Book value 14 14  
Fair value ₩ 14 ₩ 14  
Dae Kwang Semiconductor Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 589 589  
Ownership 0.07% 0.07%  
Acquisition Cost ₩ 6 ₩ 6  
Book value 6 6  
Fair value ₩ 6 ₩ 6  
Sanbon Department Store      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 828 828  
Ownership 0.01% 0.01%  
Acquisition Cost ₩ 124 ₩ 124  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
Miju Steel Mfg. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,097 1,097  
Ownership 0.23% 0.23%  
Acquisition Cost ₩ 50 ₩ 50  
Book value 50 50  
Fair value ₩ 50 ₩ 50  
Sungwon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 117 117 [3]  
Ownership 0.07% 0.07% [3]  
Acquisition Cost ₩ 15 ₩ 15 [3]  
Book value 15 15 [3]  
Fair value ₩ 15 ₩ 15 [3]  
Hana Civil Engineering Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 23 23  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 1 ₩ 1  
Book value 1 1  
Fair value ₩ 1 ₩ 1  
KC Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 839 839  
Ownership 0.02% 0.02%  
Acquisition Cost ₩ 6 ₩ 6  
Book value 6 6  
Fair value ₩ 6 ₩ 6  
IMHWA Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 329 329  
Ownership 0.11% 0.11%  
Acquisition Cost ₩ 5 ₩ 5  
Book value 5 5  
Fair value ₩ 5 ₩ 5  
DALIM Special Vehicle Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 58 58  
Ownership 0.08% 0.08%  
Acquisition Cost ₩ 10 ₩ 10  
Book value 10 10  
Fair value ₩ 10 ₩ 10  
ASA JEONJU Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 34,846 34,846  
Ownership 1.34% 1.34%  
Acquisition Cost ₩ 697 ₩ 697  
Book value 69 69  
Fair value ₩ 69 ₩ 69  
Moonkyung Silica Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 42 42  
Ownership 0.56% 0.56%  
Acquisition Cost ₩ 0 ₩ 0  
Book value 0 0  
Fair value ₩ 0 ₩ 0  
Sungkwang Timber Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 3 9  
Ownership 0.08% 0.34%  
Acquisition Cost ₩ 5 ₩ 4  
Book value 5 4  
Fair value ₩ 5 ₩ 4  
Yongbo Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 61 61  
Ownership 0.20% 0.20%  
Acquisition Cost ₩ 3 ₩ 3  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
HJ Steel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 218 218  
Ownership 0.07% 0.07%  
Acquisition Cost ₩ 2 ₩ 2  
Book value 2 2  
Fair value ₩ 2 ₩ 2  
KS Remicon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 12 12  
Ownership 0.04% 0.04%  
Acquisition Cost ₩ 3 ₩ 3  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
Joongang Platec Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 3,591 3,591  
Ownership 0.75% 0.75%  
Acquisition Cost ₩ 72 ₩ 72  
Book value 35 35  
Fair value ₩ 35 ₩ 35  
Pyungsan SI Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 434 434  
Ownership 0.01% 0.01%  
Acquisition Cost ₩ 9 ₩ 9  
Book value 9 9  
Fair value ₩ 9 ₩ 9  
Samgong Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 12 12  
Ownership 0.01% 0.01%  
Acquisition Cost ₩ 7 ₩ 7  
Book value 7 7  
Fair value ₩ 7 ₩ 7  
Joongang Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 540 540  
Ownership 0.12% 0.12%  
Acquisition Cost ₩ 8 ₩ 8  
Book value 8 8  
Fair value ₩ 8 ₩ 8  
AJS Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 12,906 12,906  
Ownership 0.23% 0.23%  
Acquisition Cost ₩ 32 ₩ 32  
Book value 32 32  
Fair value ₩ 32 ₩ 32  
SHIN-E B&P Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   119  
Ownership   0.13%  
Acquisition Cost   ₩ 10  
Book value   0  
Fair value   ₩ 0  
MSE Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 429 429  
Ownership 0.13% 0.13%  
Acquisition Cost ₩ 9 ₩ 9  
Book value 9 9  
Fair value ₩ 9 ₩ 9  
Ilrim Nano Tec Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,520 1,520  
Ownership 0.07% 0.07%  
Acquisition Cost ₩ 15 ₩ 15  
Book value 15 15  
Fair value ₩ 15 ₩ 15  
Youngjin Hi-Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 2,512 2,512  
Ownership 0.25% 0.25%  
Acquisition Cost ₩ 126 ₩ 126  
Book value 21 21  
Fair value ₩ 21 ₩ 21  
Buyoung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 270 270  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 3 ₩ 3  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
Ilsuk Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 152 152  
Ownership 0.17% 0.17%  
Acquisition Cost ₩ 10 ₩ 10  
Book value 10 10  
Fair value ₩ 10 ₩ 10  
Dongyang Telecom Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,760 1,760  
Ownership 0.01% 0.01%  
Acquisition Cost ₩ 11 ₩ 11  
Book value 11 11  
Fair value ₩ 11 ₩ 11  
Jongwon Remicon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 31 31  
Ownership 0.18% 0.18%  
Acquisition Cost ₩ 13 ₩ 13  
Book value 13 13  
Fair value ₩ 13 ₩ 13  
Zyle Daewoo Motor Sales Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 22 22  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 0 ₩ 0  
Book value 0 0  
Fair value ₩ 0 ₩ 0  
Daewoo Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 8 8  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 0 ₩ 0  
Book value 0 0  
Fair value ₩ 0 ₩ 0  
Seyang Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 537 537  
Ownership 0.05% 0.05%  
Acquisition Cost ₩ 27 ₩ 27  
Book value 27 27  
Fair value ₩ 27 ₩ 27  
Seungri Enterprise Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 93 93  
Ownership 0.05% 0.05%  
Acquisition Cost ₩ 3 ₩ 3  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
Onggane Food Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 5 5  
Ownership 0.07% 0.07%  
Acquisition Cost ₩ 1 ₩ 1  
Book value 1 1  
Fair value ₩ 1 ₩ 1  
Shin-E P&C Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,569 1,569  
Ownership 0.64% 0.64%  
Acquisition Cost ₩ 111 ₩ 111  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
Ejung Ad Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 132 132  
Ownership 0.09% 0.09%  
Acquisition Cost ₩ 3 ₩ 3  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
Solvus Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,056 1,056  
Ownership 0.04% 0.04%  
Acquisition Cost ₩ 3 ₩ 3  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
Myung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 89 89  
Ownership 0.05% 0.05%  
Acquisition Cost ₩ 2 ₩ 2  
Book value 2 2  
Fair value ₩ 2 ₩ 2  
Shinil Engineering Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 887 887  
Ownership 0.06% 0.06%  
Acquisition Cost ₩ 3 ₩ 3  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
Biwang Industry Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 406 406  
Ownership 0.04% 0.04%  
Acquisition Cost ₩ 2 ₩ 2  
Book value 2 2  
Fair value ₩ 2 ₩ 2  
Huimun Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   263  
Ownership   0.26%  
Acquisition Cost   ₩ 4  
Book value   4  
Fair value   ₩ 4  
Young Sung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 89 89  
Ownership 0.40% 0.40%  
Acquisition Cost ₩ 27 ₩ 26  
Book value 27 26  
Fair value ₩ 27 ₩ 26  
Yuil Industrial Electronics Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 804 804  
Ownership 0.32% 0.32%  
Acquisition Cost ₩ 16 ₩ 15  
Book value 16 15  
Fair value ₩ 16 ₩ 15  
DN TEK Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 12,401 12,401  
Ownership 0.29% 0.29%  
Acquisition Cost ₩ 62 ₩ 61  
Book value 6 5  
Fair value ₩ 6 ₩ 5  
Kwang Jin Structure Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   3,072  
Ownership   0.60%  
Acquisition Cost   ₩ 31  
Book value   31  
Fair value   ₩ 31  
Woojin Industry Corporation      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 3 3  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 16 ₩ 16  
Book value 16 16  
Fair value ₩ 16 ₩ 16  
Kwang Sung Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 325 325  
Ownership 0.35% 0.35%  
Acquisition Cost ₩ 7 ₩ 7  
Book value 7 7  
Fair value ₩ 7 ₩ 7  
Futech Mold Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 274 274  
Ownership 0.27% 0.27%  
Acquisition Cost ₩ 14 ₩ 14  
Book value 14 14  
Fair value ₩ 14 ₩ 14  
Woojoo Environment Ind. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 101 101  
Ownership 0.11% 0.11%  
Acquisition Cost ₩ 13 ₩ 13  
Book value 13 13  
Fair value ₩ 13 ₩ 13  
Hyungji Esquire Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 61 61  
Ownership 0.02% 0.02%  
Acquisition Cost ₩ 22 ₩ 22  
Book value 22 22  
Fair value ₩ 22 ₩ 22  
Kolmar Pharma Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,426 1,426  
Ownership 0.01% 0.01%  
Acquisition Cost ₩ 52 ₩ 52  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
Morado Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 209 209  
Ownership 0.04% 0.04%  
Acquisition Cost ₩ 2 ₩ 2  
Book value 2 2  
Fair value ₩ 2 ₩ 2  
Myung Sung Tex Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 20 20  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 2 ₩ 2  
Book value 2 2  
Fair value ₩ 2 ₩ 2  
Kwang Sung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 610 610  
Ownership 0.53% 0.53%  
Acquisition Cost ₩ 31 ₩ 31  
Book value 31 31  
Fair value ₩ 31 ₩ 31  
Seen Business and Technology co., Ltd. (formerly, EverTechno. Co.,Ltd.)      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 29,424 29,424  
Ownership 0.73% 0.73%  
Acquisition Cost ₩ 147 ₩ 148  
Book value 7 7  
Fair value ₩ 7 ₩ 7  
Autowel Co,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   260  
Ownership   0.38%  
Acquisition Cost   ₩ 14  
Book value   14  
Fair value   ₩ 14  
Woobang Construction Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 8 8  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 8 ₩ 8  
Book value 8 8  
Fair value ₩ 8 ₩ 8  
Shin Pyung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 6 6  
Ownership 0.03% 0.03%  
Acquisition Cost ₩ 3 ₩ 3  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
JMC Heavy Industries Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 2,724 2,724  
Ownership 0.10% 0.10%  
Acquisition Cost ₩ 27 ₩ 27  
Book value 2 2  
Fair value ₩ 2 ₩ 2  
Najin Steel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 37 37  
Ownership 0.06% 0.06%  
Acquisition Cost ₩ 5 ₩ 5  
Book value 5 5  
Fair value ₩ 5 ₩ 5  
Sinkwang Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,091 1,091  
Ownership 1.68% 1.68%  
Acquisition Cost ₩ 5 ₩ 5  
Book value 5 5  
Fair value ₩ 5 ₩ 5  
Crystal Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   22  
Ownership   0.07%  
Acquisition Cost   ₩ 2  
Book value   2  
Fair value   ₩ 2  
Elephant & Friends Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 563 563  
Ownership 0.61% 0.61%  
Acquisition Cost ₩ 3 ₩ 3  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
Mireco Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 109 109  
Ownership 0.25% 0.25%  
Acquisition Cost ₩ 11 ₩ 11  
Book value 11 11  
Fair value ₩ 11 ₩ 11  
L&K Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,615 1,615  
Ownership 0.60% 0.60%  
Acquisition Cost ₩ 24 ₩ 24  
Book value 24 24  
Fair value ₩ 24 ₩ 24  
JO Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,263 1,263  
Ownership 0.62% 0.62%  
Acquisition Cost ₩ 25 ₩ 25  
Book value 25 25  
Fair value ₩ 25 ₩ 25  
Kendae Printing Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 422 422  
Ownership 0.60% 0.60%  
Acquisition Cost ₩ 21 ₩ 21  
Book value 21 21  
Fair value ₩ 21 ₩ 21  
Dauning Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 231 231  
Ownership 0.41% 0.41%  
Acquisition Cost ₩ 6 ₩ 6  
Book value 6 6  
Fair value ₩ 6 ₩ 6  
Korea Trecision Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 22 22  
Ownership 0.45% 0.45%  
Acquisition Cost ₩ 5 ₩ 5  
Book value 5 5  
Fair value ₩ 5 ₩ 5  
Ace Track Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 3,130 3,130  
Ownership 1.08% 1.08%  
Acquisition Cost ₩ 219 ₩ 219  
Book value 59 59  
Fair value ₩ 59 ₩ 59  
Yoo-A Construction Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 105 105  
Ownership 0.20% 0.20%  
Acquisition Cost ₩ 11 ₩ 11  
Book value 11 11  
Fair value ₩ 11 ₩ 11  
Dung Hwan Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 531 531  
Ownership 0.02% 0.02%  
Acquisition Cost ₩ 5 ₩ 5  
Book value 5 5  
Fair value ₩ 5 ₩ 5  
Hurim Biocell Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,021 1,021  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 5 ₩ 5  
Book value 5 5  
Fair value ₩ 5 ₩ 5  
Smart Power Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 133,333 133,333  
Ownership 4.14% 4.35%  
Acquisition Cost ₩ 200 ₩ 200  
Book value 200 200  
Fair value ₩ 200 ₩ 200  
Sunjin Power Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 4,941 4,941  
Ownership 0.92% 0.92%  
Acquisition Cost ₩ 247 ₩ 247  
Book value 32 32  
Fair value ₩ 32 ₩ 32  
Haseung Industries Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 55 55  
Ownership 0.62% 0.62%  
Acquisition Cost ₩ 28 ₩ 28  
Book value 28 28  
Fair value ₩ 28 ₩ 28  
Beer Yeast Korea Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,388 1,388  
Ownership 0.43% 0.43%  
Acquisition Cost ₩ 7 ₩ 7  
Book value 7 7  
Fair value ₩ 7 ₩ 7  
Korea Bio Red Ginseng Co,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   194  
Ownership   0.09%  
Acquisition Cost   ₩ 10  
Book value   10  
Fair value   ₩ 10  
B CON Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 96 96  
Ownership 1.16% 1.16%  
Acquisition Cost ₩ 6 ₩ 6  
Book value 6 6  
Fair value ₩ 6 ₩ 6  
SsangMa Machine Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   4  
Ownership   0.05%  
Acquisition Cost   ₩ 1  
Book value   1  
Fair value   ₩ 1  
Ace Integration Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 105 105  
Ownership 0.09% 0.09%  
Acquisition Cost ₩ 23 ₩ 24  
Book value 23 24  
Fair value ₩ 23 ₩ 24  
AceInti Agricultural Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 16 16  
Ownership 0.02% 0.02%  
Acquisition Cost ₩ 5 ₩ 5  
Book value 5 5  
Fair value ₩ 5 ₩ 5  
KyungDong Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 130 130  
Ownership 0.01% 0.01%  
Acquisition Cost ₩ 1 ₩ 1  
Book value 1 1  
Fair value ₩ 1 ₩ 1  
ChunWon Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 193 193  
Ownership 0.19% 0.19%  
Acquisition Cost ₩ 39 ₩ 39  
Book value 39 39  
Fair value ₩ 39 ₩ 39  
WonIl Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   999  
Ownership   0.15%  
Acquisition Cost   ₩ 50  
Book value   50  
Fair value   ₩ 50  
SungLim Industrial Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 29 29  
Ownership 0.03% 0.03%  
Acquisition Cost ₩ 1 ₩ 1  
Book value 1 1  
Fair value ₩ 1 ₩ 1  
Korea Minerals Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 191 191  
Ownership 0.05% 0.05%  
Acquisition Cost ₩ 135 ₩ 134  
Book value 1 1  
Fair value ₩ 1 ₩ 1  
HyoDong Development Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 128 119  
Ownership 0.15% 0.15%  
Acquisition Cost ₩ 25 ₩ 24  
Book value 25 24  
Fair value ₩ 25 ₩ 24  
Haspe Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 652 652  
Ownership 0.55% 0.55%  
Acquisition Cost ₩ 20 ₩ 20  
Book value 20 20  
Fair value ₩ 20 ₩ 20  
JoHyun Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 350 350  
Ownership 1.56% 1.56%  
Acquisition Cost ₩ 18 ₩ 18  
Book value 18 18  
Fair value ₩ 18 ₩ 18  
KC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 5,107 5,107  
Ownership 0.17% 0.17%  
Acquisition Cost ₩ 26 ₩ 26  
Book value 26 26  
Fair value ₩ 26 ₩ 26  
SeongJi Industrial Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 41 41  
Ownership 0.05% 0.05%  
Acquisition Cost ₩ 1 ₩ 1  
Book value 1 1  
Fair value ₩ 1 ₩ 1  
Dong Yang Metal Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 2,951 2,951  
Ownership 1.97% 1.97%  
Acquisition Cost ₩ 161 ₩ 161  
Book value 148 147  
Fair value ₩ 148 ₩ 147  
Seyang Precision Ind.Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 829 829  
Ownership 0.23% 0.23%  
Acquisition Cost ₩ 41 ₩ 41  
Book value 41 41  
Fair value ₩ 41 ₩ 41  
Dooriwon Food System Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 13 13  
Ownership 0.27% 0.27%  
Acquisition Cost ₩ 1 ₩ 1  
Book value 1 1  
Fair value ₩ 1 ₩ 1  
ShinShin Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 339 339  
Ownership 1.12% 1.12%  
Acquisition Cost ₩ 17 ₩ 17  
Book value 17 17  
Fair value ₩ 17 ₩ 17  
Kitorang Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   165  
Ownership   0.24%  
Acquisition Cost   ₩ 49  
Book value   49  
Fair value   ₩ 49  
Sung Kwang Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 23 23  
Ownership 0.37% 0.37%  
Acquisition Cost ₩ 6 ₩ 6  
Book value 6 6  
Fair value ₩ 6 ₩ 6  
Shinheung petrol. Co. Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 699 699  
Ownership 0.14% 0.14%  
Acquisition Cost ₩ 35 ₩ 35  
Book value 35 35  
Fair value ₩ 35 ₩ 35  
Force TEC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 3,501 3,501  
Ownership 0.02% 0.02%  
Acquisition Cost ₩ 18 ₩ 18  
Book value 18 18  
Fair value ₩ 18 ₩ 18  
Samsung Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 486 486  
Ownership 1.28% 1.28%  
Acquisition Cost ₩ 97 ₩ 97  
Book value 36 36  
Fair value ₩ 36 ₩ 36  
Tae Hyung Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 28 28  
Ownership 0.43% 0.43%  
Acquisition Cost ₩ 20 ₩ 20  
Book value 20 20  
Fair value ₩ 20 ₩ 20  
Samyangplant Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   323  
Ownership   0.60%  
Acquisition Cost   ₩ 16  
Book value   16  
Fair value   ₩ 16  
Younil Metal Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 41 41  
Ownership 0.21% 0.21%  
Acquisition Cost ₩ 21 ₩ 21  
Book value 21 21  
Fair value ₩ 21 ₩ 21  
Myungjin Tech Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   20  
Ownership   0.54%  
Acquisition Cost   ₩ 4  
Book value   4  
Fair value   ₩ 4  
Hankook Precision Ind Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 110 110  
Ownership 0.06% 0.06%  
Acquisition Cost ₩ 11 ₩ 11  
Book value 3 11  
Fair value ₩ 3 ₩ 11  
Borneo International Furniture Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 4,000 4,000 [4]  
Ownership 0.16% 0.16% [4]  
Acquisition Cost ₩ 97 ₩ 97 [4]  
Book value 13 13 [4]  
Fair value ₩ 13 ₩ 13 [4]  
CJ Paradise Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 24 24  
Ownership 0.02% 0.02%  
Acquisition Cost ₩ 12 ₩ 12  
Book value 12 12  
Fair value ₩ 12 ₩ 12  
Han Young Technology Company Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 35 35  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 0 ₩ 0  
Book value 0 0  
Fair value ₩ 0 ₩ 0  
STX Offshore & Shipbuilding Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 8,622 8,622  
Ownership 0.25% 0.25%  
Acquisition Cost ₩ 1,078 ₩ 1,078  
Book value 1,078 1,078  
Fair value ₩ 1,078 ₩ 1,078  
Ptotronics Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 843 843  
Ownership 0.42% 0.42%  
Acquisition Cost ₩ 84 ₩ 84  
Book value 6 6  
Fair value ₩ 6 ₩ 6  
NFT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 136 136  
Ownership 0.40% 0.40%  
Acquisition Cost ₩ 8 ₩ 8  
Book value 8 8  
Fair value ₩ 8 ₩ 8  
Echoroba Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 157 157  
Ownership 0.02% 0.02%  
Acquisition Cost ₩ 3 ₩ 3  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
Hyundaitech Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,363 1,363  
Ownership 0.87% 0.87%  
Acquisition Cost ₩ 27 ₩ 27  
Book value 27 27  
Fair value ₩ 27 ₩ 27  
Dasan Material Co.Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 29 29  
Ownership 0.04% 0.04%  
Acquisition Cost ₩ 22 ₩ 22  
Book value 22 22  
Fair value ₩ 22 ₩ 22  
Fish World Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 47 47  
Ownership 0.21% 0.21%  
Acquisition Cost ₩ 2 ₩ 2  
Book value 2 2  
Fair value ₩ 2 ₩ 2  
SG Shinsung Engineering and Construction Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 10 10  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 6 ₩ 6  
Book value 6 6  
Fair value ₩ 6 ₩ 6  
Samdo Industry Electric Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 48 48  
Ownership 0.02% 0.02%  
Acquisition Cost ₩ 1 ₩ 1  
Book value 1 1  
Fair value ₩ 1 ₩ 1  
Taejung Industries Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 9,268 9,268  
Ownership 0.30% 0.30%  
Acquisition Cost ₩ 5 ₩ 5  
Book value 5 5  
Fair value ₩ 5 ₩ 5  
Shinsei Trading Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 64 64  
Ownership 0.72% 0.72%  
Acquisition Cost ₩ 6 ₩ 6  
Book value 6 6  
Fair value ₩ 6 ₩ 6  
Dynamic Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 111 111  
Ownership 0.19% 0.19%  
Acquisition Cost ₩ 3 ₩ 3  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
Green Alchemy Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 38,202 38,202  
Ownership 1.48% 1.48%  
Acquisition Cost ₩ 191 ₩ 191  
Book value 17 17  
Fair value ₩ 17 ₩ 17  
Youone TBM Engineering & Construction Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 615 615  
Ownership 0.27% 0.27%  
Acquisition Cost ₩ 31 ₩ 31  
Book value 31 31  
Fair value ₩ 31 ₩ 31  
KM Leatech      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,648 1,648  
Ownership 0.98% 0.98%  
Acquisition Cost ₩ 8 ₩ 8  
Book value 8 8  
Fair value ₩ 8 ₩ 8  
Wonil T&I Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   229  
Ownership   0.17%  
Acquisition Cost   ₩ 23  
Book value   23  
Fair value   ₩ 23  
Semist Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 555 555  
Ownership 0.80% 0.80%  
Acquisition Cost ₩ 3 ₩ 3  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
DS POWER Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   580,000  
Ownership   2.34%  
Acquisition Cost   ₩ 2,900  
Book value   916  
Fair value   ₩ 916  
Sewon Bus Co.,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 12 12  
Ownership 0.00% 0.00%  
Acquisition Cost ₩ 0 ₩ 0  
Book value 0 0  
Fair value ₩ 0 ₩ 0  
Enertec Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 7,937 7,937  
Ownership 0.19% 0.19%  
Acquisition Cost ₩ 44 ₩ 44  
Book value 44 44  
Fair value ₩ 44 ₩ 44  
Sangji Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 20 20  
Ownership 0.26% 0.26%  
Acquisition Cost ₩ 4 ₩ 4  
Book value 4 4  
Fair value ₩ 4 ₩ 4  
Bellie Doughnuts Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 64 64  
Ownership 0.07% 0.07%  
Acquisition Cost ₩ 4 ₩ 4  
Book value 4 4  
Fair value ₩ 4 ₩ 4  
Possbell Engineering Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 36 36  
Ownership 0.64% 0.64%  
Acquisition Cost ₩ 1 ₩ 1  
Book value 1 1  
Fair value ₩ 1 ₩ 1  
AIRTECH Information communication Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 2,379 2,379  
Ownership 0.60% 0.60%  
Acquisition Cost ₩ 12 ₩ 12  
Book value 12 12  
Fair value ₩ 12 ₩ 12  
CST co,ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   4,998  
Ownership   0.28%  
Acquisition Cost   ₩ 100  
Book value   100  
Fair value   ₩ 100  
TN Inc      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   1,416  
Ownership   2.00%  
Acquisition Cost   ₩ 71  
Book value   71  
Fair value   ₩ 71  
Shin kwang Industrial Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 884 884  
Ownership 0.35% 0.35%  
Acquisition Cost ₩ 55 ₩ 55  
Book value 55 55  
Fair value ₩ 55 ₩ 55  
Kiscom Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,493 1,493  
Ownership 0.04% 0.04%  
Acquisition Cost ₩ 1 ₩ 1  
Book value 1 1  
Fair value ₩ 1 ₩ 1  
Seil Electronics Co,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   2,285  
Ownership   0.41%  
Acquisition Cost   ₩ 286  
Book value   286  
Fair value   ₩ 286  
Wonil laser Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 157 157  
Ownership 0.37% 0.37%  
Acquisition Cost ₩ 16 ₩ 16  
Book value 16 16  
Fair value ₩ 16 ₩ 16  
Pyung Hwa Industrial Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 3,388 3,388  
Ownership 3.00% 3.00%  
Acquisition Cost ₩ 85 ₩ 85  
Book value 85 85  
Fair value ₩ 85 ₩ 85  
Navanakorn Electric Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [5]   4,442,800  
Ownership [5]   26.93%  
Acquisition Cost [5]   ₩ 17,216  
Book value [5]   17,126  
Fair value [5]   ₩ 17,126  
PT. Kedap Sayaaq      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 671 671  
Ownership 10.00% 10.00%  
Acquisition Cost ₩ 18,540 ₩ 18,540  
Book value 0 0  
Fair value ₩ 0 ₩ 0  
Set Holding      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,100,220 [6] 1,100,220 [7]  
Ownership 2.50% [6] 2.50% [7]  
Acquisition Cost ₩ 229,255 [6] ₩ 229,255 [7]  
Book value 166,863 [6] 161,983 [7]  
Fair value ₩ 166,863 [6] ₩ 161,983 [7]  
PT. Cirebon Energi Prasarana      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 22,420 22,420  
Ownership 10.00% 10.00%  
Acquisition Cost ₩ 2,612 ₩ 2,612  
Book value 2,596 2,507  
Fair value ₩ 2,596 ₩ 2,507  
KODE NOVUS I LLC      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares [8]   0  
Ownership [8]   10.00%  
Acquisition Cost [8]   ₩ 0  
Book value [8]   0  
Fair value [8]   ₩ 0  
Choheung packing Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 61 61  
Ownership 0.13% 0.13%  
Acquisition Cost ₩ 12 ₩ 12  
Book value 12 12  
Fair value ₩ 12 ₩ 12  
Jaewoo Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 359 359  
Ownership 0.24% 0.24%  
Acquisition Cost ₩ 11 ₩ 11  
Book value 11 11  
Fair value ₩ 11 ₩ 11  
Wooyang HC Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,375 1,375 [9]  
Ownership 0.01% 0.01% [9]  
Acquisition Cost ₩ 159 ₩ 159 [9]  
Book value 159 159 [9]  
Fair value ₩ 159 ₩ 159 [9]  
Sungsan Parts Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 629 629  
Ownership 0.80% 0.80%  
Acquisition Cost ₩ 63 ₩ 63  
Book value 63 63  
Fair value ₩ 63 ₩ 63  
KMT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,411 1,411  
Ownership 0.93% 0.93%  
Acquisition Cost ₩ 21 ₩ 21  
Book value 21 21  
Fair value ₩ 21 ₩ 21  
TheYeonriji Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 116 116  
Ownership 0.10% 0.10%  
Acquisition Cost ₩ 6 ₩ 6  
Book value 6 6  
Fair value ₩ 6 ₩ 6  
Flusys Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 9 9  
Ownership 0.08% 0.08%  
Acquisition Cost ₩ 2 ₩ 2  
Book value 2 2  
Fair value ₩ 2 ₩ 2  
DaeSung Frontier Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   2,203  
Ownership   1.11%  
Acquisition Cost   ₩ 221  
Book value   221  
Fair value   ₩ 221  
DongSeo Electronics Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 323 323  
Ownership 0.07% 0.07%  
Acquisition Cost ₩ 16 ₩ 16  
Book value 16 16  
Fair value ₩ 16 ₩ 16  
Daewoo Display Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 177 177  
Ownership 0.03% 0.03%  
Acquisition Cost ₩ 5 ₩ 5  
Book value 5 5  
Fair value ₩ 5 ₩ 5  
Yeong-gwang Remicon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 15 15  
Ownership 0.12% 0.12%  
Acquisition Cost ₩ 2 ₩ 2  
Book value 2 2  
Fair value ₩ 2 ₩ 2  
NTS Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 143 143  
Ownership 0.22% 0.22%  
Acquisition Cost ₩ 36 ₩ 36  
Book value 36 36  
Fair value ₩ 36 ₩ 36  
AID CO.,LTD.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,212 1,212  
Ownership 0.57% 0.57%  
Acquisition Cost ₩ 36 ₩ 36  
Book value 36 36  
Fair value ₩ 36 ₩ 36  
Changwon Eco-friendly farming corporation      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 3 3  
Ownership 0.01% 0.01%  
Acquisition Cost ₩ 0 ₩ 0  
Book value 0 0  
Fair value ₩ 0 ₩ 0  
Kumo Hitech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 6,697 6,697  
Ownership 0.53% 0.53%  
Acquisition Cost ₩ 100 ₩ 100  
Book value 100 100  
Fair value ₩ 100 ₩ 100  
Kyung Pyo Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 186 186  
Ownership 0.76% 0.76%  
Acquisition Cost ₩ 19 ₩ 19  
Book value 19 19  
Fair value ₩ 19 ₩ 19  
Daedong Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 617 617  
Ownership 0.55% 0.55%  
Acquisition Cost ₩ 46 ₩ 46  
Book value 46 46  
Fair value ₩ 46 ₩ 46  
Doosung Heavy Industries Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 53 53  
Ownership 0.06% 0.06%  
Acquisition Cost ₩ 5 ₩ 5  
Book value 5 5  
Fair value ₩ 5 ₩ 5  
Jangback Testiles Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   494  
Ownership   5.05%  
Acquisition Cost   ₩ 49  
Book value   49  
Fair value   ₩ 49  
Samjoo Hightech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 522 522  
Ownership 0.08% 0.08%  
Acquisition Cost ₩ 3 ₩ 3  
Book value 3 3  
Fair value ₩ 3 ₩ 3  
Samkwang Chemical Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 204 204  
Ownership 1.27% 1.27%  
Acquisition Cost ₩ 51 ₩ 51  
Book value 51 51  
Fair value ₩ 51 ₩ 51  
Taekwang Industry Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   1,327  
Ownership   0.48%  
Acquisition Cost   ₩ 93  
Book value   93  
Fair value   ₩ 93  
Taekwang Precision Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   54  
Ownership   0.47%  
Acquisition Cost   ₩ 54  
Book value   54  
Fair value   ₩ 54  
SG Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 213 213  
Ownership 0.54% 0.54%  
Acquisition Cost ₩ 21 ₩ 21  
Book value 21 21  
Fair value ₩ 21 ₩ 21  
Shinseung Chemical Industy Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 5 5  
Ownership 0.01% 0.01%  
Acquisition Cost ₩ 60 ₩ 60  
Book value 60 60  
Fair value ₩ 60 ₩ 60  
KJ Alloy Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 368 368  
Ownership 0.20% 0.20%  
Acquisition Cost ₩ 7 ₩ 7  
Book value 7 7  
Fair value ₩ 7 ₩ 7  
SM Hi-tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 22 22  
Ownership 0.39% 0.39%  
Acquisition Cost ₩ 22 ₩ 22  
Book value 22 22  
Fair value ₩ 22 ₩ 22  
Keum Mun Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,320 1,320  
Ownership 0.97% 0.97%  
Acquisition Cost ₩ 330 ₩ 330  
Book value 56 330  
Fair value ₩ 56 ₩ 330  
Puruen Environment Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 967 967  
Ownership 1.34% 1.34%  
Acquisition Cost ₩ 19 ₩ 19  
Book value 19 19  
Fair value ₩ 19 ₩ 19  
Miretech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 9,111 9,111  
Ownership 0.27% 0.27%  
Acquisition Cost ₩ 18 ₩ 18  
Book value 18 18  
Fair value ₩ 18 ₩ 18  
SIE Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 12 12  
Ownership 0.02% 0.02%  
Acquisition Cost ₩ 1 ₩ 1  
Book value 1 1  
Fair value ₩ 1 ₩ 1  
Soongwon Ind Co, Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares   150  
Ownership   0.40%  
Acquisition Cost   ₩ 53  
Book value   53  
Fair value   ₩ 53  
Sejin Hightech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 17,980 17,980  
Ownership 0.16% 0.16%  
Acquisition Cost ₩ 18 ₩ 18  
Book value 18 18  
Fair value ₩ 18 ₩ 18  
Namcheong Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 7,096 7,096  
Ownership 0.28% 0.28%  
Acquisition Cost ₩ 284 ₩ 284  
Book value 11 284  
Fair value ₩ 11 ₩ 284  
Eun Sung Enterprise Co.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,131 1,131  
Ownership 0.72% 0.72%  
Acquisition Cost ₩ 17 ₩ 17  
Book value 17 17  
Fair value ₩ 17 ₩ 17  
Dongdo Basalt Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 182 182  
Ownership 1.50% 1.50%  
Acquisition Cost ₩ 73 ₩ 73  
Book value 73 73  
Fair value ₩ 73 ₩ 73  
Shinyoung Textiles Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 523 523  
Ownership 1.01% 1.01%  
Acquisition Cost ₩ 52 ₩ 52  
Book value 23 52  
Fair value ₩ 23 ₩ 52  
Bugook Cast Iron Co.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 135 135  
Ownership 0.71% 0.71%  
Acquisition Cost ₩ 14 ₩ 14  
Book value 14 14  
Fair value ₩ 14 ₩ 14  
Ilwoo Steel Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 41 41  
Ownership 0.28% 0.28%  
Acquisition Cost ₩ 17 ₩ 17  
Book value 17 17  
Fair value ₩ 17 ₩ 17  
Dong-un Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,159 1,159  
Ownership 6.28% 6.28%  
Acquisition Cost ₩ 81 ₩ 81  
Book value 81 81  
Fair value ₩ 81 ₩ 81  
Wongwang Door Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 575 575  
Ownership 1.00% 1.00%  
Acquisition Cost ₩ 29 ₩ 29  
Book value 29 29  
Fair value ₩ 29 ₩ 29  
Seobu Highway Solar Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 19,460    
Ownership 10.00%    
Acquisition Cost ₩ 192    
Book value 192    
Fair value ₩ 192    
Dongbu Highway Solar Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 19,020    
Ownership 4.99%    
Acquisition Cost ₩ 192    
Book value 192    
Fair value ₩ 192    
Muan sunshine solar power plant      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 298,300    
Ownership 19.00%    
Acquisition Cost ₩ 1,492    
Book value 1,492    
Fair value ₩ 1,492    
mansu Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 344    
Ownership 0.25%    
Acquisition Cost ₩ 15    
Book value 15    
Fair value ₩ 15    
Eanskorea Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 39    
Ownership 0.05%    
Acquisition Cost ₩ 2    
Book value 2    
Fair value ₩ 2    
Youngdongseafood Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 165    
Ownership 33.00%    
Acquisition Cost ₩ 8    
Book value 8    
Fair value ₩ 8    
Hyunwoo Winstar Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1    
Ownership 0.00%    
Acquisition Cost ₩ 0    
Book value 0    
Fair value ₩ 0    
Sehwa Diecasting Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 299    
Ownership 1.66%    
Acquisition Cost ₩ 44    
Book value 44    
Fair value ₩ 44    
Sungchang Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 159    
Ownership 0.31%    
Acquisition Cost ₩ 10    
Book value 10    
Fair value ₩ 10    
Yuchang Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 90    
Ownership 0.11%    
Acquisition Cost ₩ 5    
Book value 5    
Fair value ₩ 5    
Jeongpum Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 322    
Ownership 0.35%    
Acquisition Cost ₩ 16    
Book value 16    
Fair value ₩ 16    
Korea Steel Power Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 2,761    
Ownership 1.88%    
Acquisition Cost ₩ 55    
Book value 55    
Fair value ₩ 55    
DMC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 5,831    
Ownership 0.02%    
Acquisition Cost ₩ 38    
Book value 38    
Fair value ₩ 38    
Amanex Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 10    
Ownership 0.02%    
Acquisition Cost ₩ 9    
Book value 9    
Fair value ₩ 9    
Dae-A Leisure Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 23    
Ownership 0.00%    
Acquisition Cost ₩ 4    
Book value 4    
Fair value ₩ 4    
Caffe Bene Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,908    
Ownership 0.03%    
Acquisition Cost ₩ 2    
Book value 2    
Fair value ₩ 2    
Daechang HRSG Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 618    
Ownership 0.12%    
Acquisition Cost ₩ 62    
Book value 62    
Fair value ₩ 62    
Shinjin International Corp.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 4    
Ownership 0.01%    
Acquisition Cost ₩ 1    
Book value 1    
Fair value ₩ 1    
Daewoon Shell Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 666    
Ownership 2.81%    
Acquisition Cost ₩ 33    
Book value 33    
Fair value ₩ 33    
Jinhung Packaging Co.,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 4,329    
Ownership 3.02%    
Acquisition Cost ₩ 9    
Book value 22    
Fair value ₩ 22    
Donglim Eng Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 26    
Ownership 0.11%    
Acquisition Cost ₩ 3    
Book value 3    
Fair value ₩ 3    
SIP Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 274    
Ownership 0.55%    
Acquisition Cost ₩ 7    
Book value 7    
Fair value ₩ 7    
Clizen Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 615    
Ownership 0.34%    
Acquisition Cost ₩ 31    
Book value 31    
Fair value ₩ 31    
DAEDONGMILLENNIUM Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 159    
Ownership 0.42%    
Acquisition Cost ₩ 32    
Book value 32    
Fair value ₩ 32    
Daeji Product Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 15    
Ownership 0.05%    
Acquisition Cost ₩ 1    
Book value 0    
Fair value ₩ 0    
Cheong Hae Myeong Ga Co.,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,867    
Ownership 0.11%    
Acquisition Cost ₩ 5    
Book value 5    
Fair value ₩ 5    
Shinhan Sangi Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 29    
Ownership 0.20%    
Acquisition Cost ₩ 4    
Book value 4    
Fair value ₩ 4    
Jaein Circuit Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 498    
Ownership 1.12%    
Acquisition Cost ₩ 65    
Book value 65    
Fair value ₩ 65    
SSET Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 181    
Ownership 0.30%    
Acquisition Cost ₩ 18    
Book value 18    
Fair value ₩ 18    
Sewon PM Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 963    
Ownership 1.11%    
Acquisition Cost ₩ 48    
Book value 48    
Fair value ₩ 48    
Dawon Yuhwa Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 506    
Ownership 1.94%    
Acquisition Cost ₩ 25    
Book value 25    
Fair value ₩ 25    
Ogokbaekkwa Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 101    
Ownership 0.12%    
Acquisition Cost ₩ 1    
Book value 1    
Fair value ₩ 1    
Shinwonn Toptech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 834    
Ownership 0.51%    
Acquisition Cost ₩ 83    
Book value 83    
Fair value ₩ 83    
KMLC Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 281    
Ownership 0.14%    
Acquisition Cost ₩ 22    
Book value 22    
Fair value ₩ 22    
Seinfood Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 13    
Ownership 0.17%    
Acquisition Cost ₩ 7    
Book value 7    
Fair value ₩ 7    
TaeSung Eco-Tech. Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,368    
Ownership 4.55%    
Acquisition Cost ₩ 34    
Book value 34    
Fair value ₩ 34    
Kukex Inc.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 639    
Ownership 0.05%    
Acquisition Cost ₩ 3    
Book value 3    
Fair value ₩ 3    
Youngshin Plu Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 104    
Ownership 0.12%    
Acquisition Cost ₩ 5    
Book value 5    
Fair value ₩ 5    
Chang won Engineering Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 22    
Ownership 0.00%    
Acquisition Cost ₩ 4    
Book value 4    
Fair value ₩ 4    
Samsung Silup Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 47    
Ownership 0.19%    
Acquisition Cost ₩ 5    
Book value 5    
Fair value ₩ 5    
Samwon Bio Tech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 390    
Ownership 0.25%    
Acquisition Cost ₩ 6    
Book value 6    
Fair value ₩ 6    
IZU KOREA Co. Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 48    
Ownership 0.00%    
Acquisition Cost ₩ 2    
Book value 2    
Fair value ₩ 2    
Dongdo CNP Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 234    
Ownership 0.36%    
Acquisition Cost ₩ 6    
Book value 6    
Fair value ₩ 6    
Hando Precision Co.,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 38    
Ownership 0.26%    
Acquisition Cost ₩ 4    
Book value 4    
Fair value ₩ 4    
Dae Bang Industry Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 115    
Ownership 0.13%    
Acquisition Cost ₩ 6    
Book value 6    
Fair value ₩ 6    
S.I.T. Co.,Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 2,213    
Ownership 0.44%    
Acquisition Cost ₩ 22    
Book value 22    
Fair value ₩ 22    
Taejin Hiech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 78    
Ownership 0.26%    
Acquisition Cost ₩ 3    
Book value 3    
Fair value ₩ 3    
Headone Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 69    
Ownership 0.12%    
Acquisition Cost ₩ 7    
Book value 7    
Fair value ₩ 7    
Enaindustry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 201    
Ownership 0.09%    
Acquisition Cost ₩ 141    
Book value 141    
Fair value ₩ 141    
TCT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 3,277    
Ownership 0.55%    
Acquisition Cost ₩ 82    
Book value 82    
Fair value ₩ 82    
E-Won Solutech Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 158    
Ownership 0.16%    
Acquisition Cost ₩ 40    
Book value 40    
Fair value ₩ 40    
MJT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 1,013    
Ownership 0.20%    
Acquisition Cost ₩ 51    
Book value 51    
Fair value ₩ 51    
KPL Circuit Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 283    
Ownership 0.08%    
Acquisition Cost ₩ 14    
Book value 14    
Fair value ₩ 14    
Road Solar Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 12    
Ownership 0.00%    
Acquisition Cost ₩ 0    
Book value 0    
Fair value ₩ 0    
Sung Ae Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 190    
Ownership 0.80%    
Acquisition Cost ₩ 10    
Book value 10    
Fair value ₩ 10    
Han Mi Flexible Co.,Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 143    
Ownership 0.20%    
Acquisition Cost ₩ 43    
Book value 43    
Fair value ₩ 43    
Samhwa Casting Co. Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 200    
Ownership 0.00%    
Acquisition Cost ₩ 100    
Book value 100    
Fair value ₩ 100    
Millennium PNT Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 227    
Ownership 0.37%    
Acquisition Cost ₩ 6    
Book value 6    
Fair value ₩ 6    
GN Chem Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 40    
Ownership 0.07%    
Acquisition Cost ₩ 1    
Book value 1    
Fair value ₩ 1    
GW Industry Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 505    
Ownership 0.07%    
Acquisition Cost ₩ 51    
Book value 51    
Fair value ₩ 51    
TM Construction co. Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 4    
Ownership 0.00%    
Acquisition Cost ₩ 0    
Book value 0    
Fair value ₩ 0    
Dae Myung Co., Ltd      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 114    
Ownership 0.08%    
Acquisition Cost ₩ 3    
Book value 3    
Fair value ₩ 3    
Nanomicart Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 176    
Ownership 1.06%    
Acquisition Cost ₩ 35    
Book value 35    
Fair value ₩ 35    
Young San Heavy Industries Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 74    
Ownership 0.11%    
Acquisition Cost ₩ 7    
Book value 7    
Fair value ₩ 7    
Samchungwon Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 15    
Ownership 0.24%    
Acquisition Cost ₩ 2    
Book value 2    
Fair value ₩ 2    
Wooyang Frozen Foods Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 66    
Ownership 0.82%    
Acquisition Cost ₩ 27    
Book value 27    
Fair value ₩ 27    
Nanomic Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 94    
Ownership 0.63%    
Acquisition Cost ₩ 38    
Book value 38    
Fair value ₩ 38    
Dong Hwan Co., Ltd.      
Financial assets at fair value through other comprehensive income [Line Items]      
Shares 25    
Ownership 0.02%    
Acquisition Cost ₩ 1    
Book value 1    
Fair value ₩ 1    
[1] The number of shares owned has changed due to the stock merge (4:1) during the year ended December 31, 2018.
[2] The Company used initial cost as their fair value because there was not enough information to determine fair value, and the range of the estimated fair value is wide.
[3] The number of shares owned has changed due to the stock merge (5:1) during the year ended December 31, 2018.
[4] The number of shares owned has changed due to capital reduction without refund (3:1), consolidation of stocks (10,000:1), and split of stock (1:2,000) during the year ended December 31, 2018
[5] Although the Company holds more than 20% of the equity shares of these investments, the Company is unable to exercise significant influence.
[6] 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 for the year ended December 31, 2019.
[7] 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 available-for-sale financial assets in other comprehensive income or loss during the year ended December 31, 2018.
[8] As described in note 20, this is reclassified to financial assets at fair value through other comprehensive income due to loss of significant influence of the Company.
[9] The number of shares owned has changed due to the stock merge (10:1) during the year ended December 31, 2018.