XML 131 R115.htm IDEA: XBRL DOCUMENT v3.21.1
Operating segments (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of operating segments [Line Items]      
Total segment revenue ₩ 57,925,837 ₩ 58,568,082 ₩ 60,033,062
Intersegment revenue 0 0 0
Revenue from external customers 57,925,837 58,568,082 60,033,062
Depreciation and amortisation 11,548,019 11,128,740 10,024,794
Interest income 242,586 268,118 223,767
Interest expense 1,995,425 2,046,811 1,868,458
Employee benefit expense 492,288 725,120 360,575
Loss on abandonment of property, plant and equipment 255,346 364,233 481,176
Increase in provisions, net 1,832,765 2,301,215 1,056,994
Operating profit (loss) 4,096,620 (1,707,527) (685,109)
Finance income 1,510,249 1,009,706 796,870
Finance expense (2,896,443) (2,782,156) (2,470,743)
Profit (loss) related to associates and joint ventures 281,107 214,139 358,163
Profit (loss) before income tax 2,991,533 (3,265,838) (2,000,819)
Segment assets 203,142,111 197,597,792 185,249,061
Investments in associates and joint ventures 6,170,533 5,914,831 5,878,345
Acquisition of non-current assets 13,401,665 14,229,785 12,377,457
Segment liabilities 132,475,265 128,708,143 114,156,299
Operating segments      
Disclosure of operating segments [Line Items]      
Total segment revenue 91,899,958 95,197,218 97,262,180
Intersegment revenue 33,974,121 36,629,136 37,229,118
Revenue from external customers 57,925,837 58,568,082 60,033,062
Depreciation and amortisation 11,675,647 11,250,366 10,081,743
Interest income 273,438 301,857 268,043
Interest expense 2,027,897 2,081,559 1,912,094
Employee benefit expense 541,893 737,207 391,055
Loss on abandonment of property, plant and equipment 255,347 364,233 481,176
Increase in provisions, net 2,002,416 2,553,019 1,049,005
Operating profit (loss) 4,387,807 (1,411,975) (557,368)
Profit (loss) related to associates and joint ventures 281,107 214,138 358,163
Segment assets 241,913,304 235,492,772 223,823,428
Investments in associates and joint ventures 6,170,533 5,914,831 5,878,345
Acquisition of non-current assets 13,432,396 14,311,340 12,440,174
Segment liabilities 133,818,362 130,033,377 115,812,546
Operating segments | Transmission and distribution      
Disclosure of operating segments [Line Items]      
Total segment revenue 57,345,933 58,328,372 59,676,952
Intersegment revenue 1,224,602 1,336,725 1,393,120
Revenue from external customers 56,121,331 56,991,647 58,283,832
Depreciation and amortisation 3,836,355 3,814,428 3,555,158
Interest income 48,220 73,478 77,925
Interest expense 737,973 777,120 708,329
Employee benefit expense 190,302 298,144 144,180
Loss on abandonment of property, plant and equipment 236,727 350,865 424,774
Increase in provisions, net 731,194 987,828 580,931
Operating profit (loss) 3,045,912 (2,568,529) (1,814,363)
Profit (loss) related to associates and joint ventures 169,176 140,757 287,268
Segment assets 113,115,667 109,809,254 107,486,379
Investments in associates and joint ventures 4,204,090 3,716,931 3,671,897
Acquisition of non-current assets 6,535,380 6,340,593 6,323,504
Segment liabilities 59,772,046 58,350,681 53,404,610
Operating segments | Electric power generation (Nuclear)      
Disclosure of operating segments [Line Items]      
Total segment revenue 9,938,941 8,937,026 8,858,717
Intersegment revenue 9,817,147 8,908,803 8,833,787
Revenue from external customers 121,794 28,223 24,930
Depreciation and amortisation 3,564,120 3,227,695 3,088,019
Interest income 25,581 37,277 30,422
Interest expense 503,485 511,864 503,161
Employee benefit expense 86,672 132,283 76,467
Loss on abandonment of property, plant and equipment 0 0 38,886
Increase in provisions, net 691,052 672,134 520,167
Operating profit (loss) 1,168,833 782,511 357,401
Profit (loss) related to associates and joint ventures (4,905) (5,497) 9,946
Segment assets 61,850,865 59,562,190 55,792,704
Investments in associates and joint ventures 116,867 59,081 43,038
Acquisition of non-current assets 2,419,939 2,574,358 2,187,077
Segment liabilities 35,652,467 33,909,152 30,484,104
Operating segments | Electric power generation (Non-nuclear)      
Disclosure of operating segments [Line Items]      
Total segment revenue 20,329,611 24,254,957 25,204,085
Intersegment revenue 19,552,376 23,472,153 24,389,816
Revenue from external customers 777,235 782,804 814,269
Depreciation and amortisation 4,034,024 3,955,333 3,269,023
Interest income 20,843 35,626 29,313
Interest expense 622,346 655,466 577,441
Employee benefit expense 112,775 163,626 91,140
Loss on abandonment of property, plant and equipment 17,679 13,364 17,516
Increase in provisions, net 346,195 766,407 (227,234)
Operating profit (loss) (172,884) 551,287 482,418
Profit (loss) related to associates and joint ventures 115,096 77,641 58,993
Segment assets 54,531,155 54,758,933 49,296,392
Investments in associates and joint ventures 1,807,409 2,088,581 2,114,203
Acquisition of non-current assets 3,758,795 4,955,784 3,435,222
Segment liabilities 33,292,680 33,117,193 27,558,156
Operating segments | Plant maintenance & engineering service      
Disclosure of operating segments [Line Items]      
Total segment revenue 2,703,472 2,627,539 2,526,126
Intersegment revenue 2,283,333 2,254,841 2,170,959
Revenue from external customers 420,139 372,698 355,167
Depreciation and amortisation 119,056 125,546 114,030
Interest income 11,789 14,214 12,505
Interest expense 1,250 2,861 4,126
Employee benefit expense 101,255 124,745 77,526
Loss on abandonment of property, plant and equipment 0 0 0
Increase in provisions, net 230,264 124,242 174,785
Operating profit (loss) 197,553 312,341 314,755
Profit (loss) related to associates and joint ventures 1,740 1,237 1,956
Segment assets 3,492,571 3,528,879 3,431,068
Investments in associates and joint ventures 42,167 50,238 49,207
Acquisition of non-current assets 141,226 95,810 111,393
Segment liabilities 1,061,949 1,124,855 1,200,390
Operating segments | Others      
Disclosure of operating segments [Line Items]      
Total segment revenue 1,582,001 1,049,324 996,300
Intersegment revenue 1,096,663 656,614 441,436
Revenue from external customers 485,338 392,710 554,864
Depreciation and amortisation 122,092 127,364 55,513
Interest income 167,005 141,262 117,878
Interest expense 162,843 134,248 119,037
Employee benefit expense 50,889 18,409 1,742
Loss on abandonment of property, plant and equipment 940 4 0
Increase in provisions, net 3,711 2,408 356
Operating profit (loss) 148,393 (489,585) 102,421
Profit (loss) related to associates and joint ventures 0 0 0
Segment assets 8,923,046 7,833,516 7,816,885
Investments in associates and joint ventures 0 0 0
Acquisition of non-current assets 577,056 344,795 382,978
Segment liabilities 4,039,220 3,531,496 3,165,286
Material reconciling items      
Disclosure of operating segments [Line Items]      
Total segment revenue (33,974,121) (36,629,136) (37,229,118)
Intersegment revenue (33,974,121) (36,629,136) (37,229,118)
Revenue from external customers 0 0 0
Depreciation and amortisation (127,628) (121,626) (56,949)
Interest income (30,852) (33,739) (44,276)
Interest expense (32,472) (34,748) (43,636)
Employee benefit expense (49,605) (12,087) (30,480)
Loss on abandonment of property, plant and equipment 0 0 0
Increase in provisions, net (169,651) (251,804) 7,989
Operating profit (loss) (291,187) (295,552) (127,741)
Profit (loss) related to associates and joint ventures 0 0 0
Segment assets (38,771,193) (37,894,980) (38,574,367)
Investments in associates and joint ventures 0 0 0
Acquisition of non-current assets (30,731) (81,555) (62,717)
Segment liabilities (1,343,097) (1,325,234) ₩ (1,656,247)
Elimination of intersegment amounts      
Disclosure of operating segments [Line Items]      
Segment assets (39,762,888) (39,207,636)  
Investments in associates and joint ventures 0 0  
Acquisition of non-current assets (30,731) (81,555)  
Segment liabilities (6,749,728) (6,654,717)  
Equity method adjustment      
Disclosure of operating segments [Line Items]      
Segment assets 1,372,001 1,791,844  
Investments in associates and joint ventures 0 0  
Acquisition of non-current assets 0 0  
Segment liabilities 0 0  
Deferred taxes      
Disclosure of operating segments [Line Items]      
Segment assets 47,664 2,048  
Investments in associates and joint ventures 0 0  
Acquisition of non-current assets 0 0  
Segment liabilities 5,417,629 5,329,158  
Others      
Disclosure of operating segments [Line Items]      
Profit (loss) before income tax   (481,236)  
Segment assets (427,970) 0  
Investments in associates and joint ventures 0 0  
Acquisition of non-current assets 0 ₩ 325  
Segment liabilities ₩ (10,998)