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Segment, Geographic and Other Information | 12 Months Ended
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Dec. 31, 2020
Segment, Geographic and Other Information [Abstract] |
Segment, Geographic and Other Information |
4. | Segment, Geographic and Other Information
(1) | Segment determination and explanation of the measurements
The Company’s operating segments are its business components that generate discrete financial information that is reported to and regularly reviewed by chief operating decision makers of the Company including but not limited to the Chief Executive Officer, for the purpose of resource allocation and assessment of segment performance. The Company’s reportable segments are ‘Transmission and distribution’, ‘Electric power generation (Nuclear)’, ‘Electric power generation (Non-nuclear)’, ‘Plant maintenance & engineering service’ and ‘Others’; others mainly represent the business unit that manages the Company’s foreign operations. Segment operating profit (loss) is determined the same way that consolidated operating profit is determined under IFRS without any adjustment for corporate allocations. The accounting policies used by each segment are consistent with the accounting policies used in the preparation of the consolidated financial statements. Segment assets and liabilities are determined based on separate financial statements of the entities instead of on a consolidated basis. There are various transactions between the reportable segments, including sales of property, plant and equipment and so on, that are conducted on an arm’s-length basis at market prices that would be applicable to an independent third party. For subsidiaries which are in a different segment from that of its immediate parent company, their carrying amount in separate financial statements is eliminated in the consolidating adjustments in the tables below. In addition, consolidation adjustments in the table below include adjustments of the amount of investment in associates and joint ventures from the cost basis amount reflected in segment assets to that determined using equity method in the consolidated financial statements.
(2) | Financial information of the segments for the years ended December 31, 2018, 2019 and 2020, respectively, are as follows:
|  |  |  |  | 2018 |
Segment |  |  |  |  | Total segment revenue |  |  | Intersegment revenue |  |  | Revenue from external customers |  |  | Depreciation and amortization |  |  | Interest income |  |  | Interest expense |  |  | Profit related to associates, joint ventures and subsidiaries |  |  | Employee benefit expense |  |  | Loss on abandonment of property, plant and equipment |  |  | Increase in provisions, net |  |  |  |  |  | Operating profit (loss) |
|  |  |  |  | In millions of won |
Transmission and distribution |  |  | W |  |  |  | 59,676,952 |  |  |  | 1,393,120 |  |  |  | 58,283,832 |  |  |  | 3,555,158 |  |  |  | 77,925 |  |  |  | 708,329 |  |  |  | 287,268 |  |  |  | 144,180 |  |  |  | 424,774 |  |  |  | 580,931 |  |  |  |  |  |  |  | (1,814,363 | )
Electric power generation (Nuclear) |  |  |  |  |  |  | 8,858,717 |  |  |  | 8,833,787 |  |  |  | 24,930 |  |  |  | 3,088,019 |  |  |  | 30,422 |  |  |  | 503,161 |  |  |  | 9,946 |  |  |  | 76,467 |  |  |  | 38,886 |  |  |  | 520,167 |  |  |  |  |  |  |  | 357,401 |
Electric power generation (Non-nuclear) |  |  |  |  |  |  | 25,204,085 |  |  |  | 24,389,816 |  |  |  | 814,269 |  |  |  | 3,269,023 |  |  |  | 29,313 |  |  |  | 577,441 |  |  |  | 58,993 |  |  |  | 91,140 |  |  |  | 17,516 |  |  |  | (227,234 | ) |  |  |  |  |  |  | 482,418 |
Plant maintenance & engineering service |  |  |  |  |  |  | 2,526,126 |  |  |  | 2,170,959 |  |  |  | 355,167 |  |  |  | 114,030 |  |  |  | 12,505 |  |  |  | 4,126 |  |  |  | 1,956 |  |  |  | 77,526 |  |  |  | — |  |  |  | 174,785 |  |  |  |  |  |  |  | 314,755 |
Others |  |  |  |  |  |  | 996,300 |  |  |  | 441,436 |  |  |  | 554,864 |  |  |  | 55,513 |  |  |  | 117,878 |  |  |  | 119,037 |  |  |  | — |  |  |  | 1,742 |  |  |  | — |  |  |  | 356 |  |  |  |  |  |  |  | 102,421 |
Consolidation adjustments |  |  |  |  |  |  | (37,229,118 | ) |  |  | (37,229,118 | ) |  |  | — |  |  |  | (56,949 | ) |  |  | (44,276 | ) |  |  | (43,636 | ) |  |  | — |  |  |  | (30,480 | ) |  |  | — |  |  |  | 7,989 |  |  |  |  |  |  |  | (127,741 | )
|  |  | W |  |  |  | 60,033,062 |  |  |  | — |  |  |  | 60,033,062 |  |  |  | 10,024,794 |  |  |  | 223,767 |  |  |  | 1,868,458 |  |  |  | 358,163 |  |  |  | 360,575 |  |  |  | 481,176 |  |  |  | 1,056,994 |  |  |  |  |  |  |  | (685,109 | )
Finance income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 796,870 |
Finance expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,470,743 | )
Gain related to associates, joint ventures and subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 358,163 |
Loss before income tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | W |  |  |  | (2,000,819 | )
|  |  |  |  | 2019 |
Segment |  |  |  |  | Total segment revenue |  |  | Intersegment revenue |  |  | Revenue from external customers |  |  | Depreciation and amortization |  |  | Interest income |  |  | Interest expense |  |  | Profit (loss) related to associates, joint ventures and subsidiaries |  |  | Employee benefit expense |  |  | Loss on abandonment of property, plant and equipment |  |  | Increase in provisions, net |  |  |  |  |  | Operating profit (loss) |
|  |  |  |  | In millions of won |
Transmission and distribution |  |  | W |  |  |  | 58,328,372 |  |  |  | 1,336,725 |  |  |  | 56,991,647 |  |  |  | 3,814,428 |  |  |  | 73,478 |  |  |  | 777,120 |  |  |  | 140,757 |  |  |  | 298,144 |  |  |  | 350,865 |  |  |  | 987,828 |  |  |  |  |  |  |  | (2,568,529 | )
Electric power generation (Nuclear) |  |  |  |  |  |  | 8,937,026 |  |  |  | 8,908,803 |  |  |  | 28,223 |  |  |  | 3,227,695 |  |  |  | 37,277 |  |  |  | 511,864 |  |  |  | (5,497 | ) |  |  | 132,283 |  |  |  | — |  |  |  | 672,134 |  |  |  |  |  |  |  | 782,511 |
Electric power generation (Non-nuclear) |  |  |  |  |  |  | 24,254,957 |  |  |  | 23,472,153 |  |  |  | 782,804 |  |  |  | 3,955,333 |  |  |  | 35,626 |  |  |  | 655,466 |  |  |  | 77,641 |  |  |  | 163,626 |  |  |  | 13,364 |  |  |  | 766,407 |  |  |  |  |  |  |  | 551,287 |
Plant maintenance & engineering service |  |  |  |  |  |  | 2,627,539 |  |  |  | 2,254,841 |  |  |  | 372,698 |  |  |  | 125,546 |  |  |  | 14,214 |  |  |  | 2,861 |  |  |  | 1,237 |  |  |  | 124,745 |  |  |  | — |  |  |  | 124,242 |  |  |  |  |  |  |  | 312,341 |
Others |  |  |  |  |  |  | 1,049,324 |  |  |  | 656,614 |  |  |  | 392,710 |  |  |  | 127,364 |  |  |  | 141,262 |  |  |  | 134,248 |  |  |  | — |  |  |  | 18,409 |  |  |  | 4 |  |  |  | 2,408 |  |  |  |  |  |  |  | (489,585 | )
Consolidation adjustments |  |  |  |  |  |  | (36,629,136 | ) |  |  | (36,629,136 | ) |  |  | — |  |  |  | (121,626 | ) |  |  | (33,739 | ) |  |  | (34,748 | ) |  |  | — |  |  |  | (12,087 | ) |  |  | — |  |  |  | (251,804 | ) |  |  |  |  |  |  | (295,552 | )
|  |  | W |  |  |  | 58,568,082 |  |  |  | — |  |  |  | 58,568,082 |  |  |  | 11,128,740 |  |  |  | 268,118 |  |  |  | 2,046,811 |  |  |  | 214,138 |  |  |  | 725,120 |  |  |  | 364,233 |  |  |  | 2,301,215 |  |  |  |  |  |  |  | (1,707,527 | )
Finance income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,009,706 |
Finance expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,782,156 | )
Gain related to associates, joint ventures and subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 214,139 |
Loss before income tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | W |  |  |  | (3,265,838 | )
|  |  |  |  | 2020 |
Segment |  |  |  |  | Total segment revenue |  |  | Intersegment revenue |  |  | Revenue from external customers |  |  | Depreciation and amortization |  |  | Interest income |  |  | Interest expense |  |  | Profit (loss) related to associates, joint ventures and subsidiaries |  |  | Employee benefit expense |  |  | Loss on abandonment of property, plant and equipment |  |  | Increase in provisions, net |  |  |  |  |  | Operating profit (loss) |
|  |  |  |  | In millions of won |
Transmission and distribution |  | ￦ |  |  |  |  | 57,345,933 |  |  |  | 1,224,602 |  |  |  | 56,121,331 |  |  |  | 3,836,355 |  |  |  | 48,220 |  |  |  | 737,973 |  |  |  | 169,176 |  |  |  | 190,302 |  |  |  | 236,727 |  |  |  | 731,194 |  |  |  |  |  |  |  | 3,045,912 |
Electric power generation (Nuclear) |  |  |  |  |  |  | 9,938,941 |  |  |  | 9,817,147 |  |  |  | 121,794 |  |  |  | 3,564,120 |  |  |  | 25,581 |  |  |  | 503,485 |  |  |  | (4,905 | ) |  |  | 86,672 |  |  |  | — |  |  |  | 691,052 |  |  |  |  |  |  |  | 1,168,833 |
Electric power generation (Non-nuclear) |  |  |  |  |  |  | 20,329,611 |  |  |  | 19,552,376 |  |  |  | 777,235 |  |  |  | 4,034,024 |  |  |  | 20,843 |  |  |  | 622,346 |  |  |  | 115,096 |  |  |  | 112,775 |  |  |  | 17,679 |  |  |  | 346,195 |  |  |  |  |  |  |  | (172,884 | )
Plant maintenance & engineering service |  |  |  |  |  |  | 2,703,472 |  |  |  | 2,283,333 |  |  |  | 420,139 |  |  |  | 119,056 |  |  |  | 11,789 |  |  |  | 1,250 |  |  |  | 1,740 |  |  |  | 101,255 |  |  |  | — |  |  |  | 230,264 |  |  |  |  |  |  |  | 197,553 |
Others |  |  |  |  |  |  | 1,582,001 |  |  |  | 1,096,663 |  |  |  | 485,338 |  |  |  | 122,092 |  |  |  | 167,005 |  |  |  | 162,843 |  |  |  | — |  |  |  | 50,889 |  |  |  | 940 |  |  |  | 3,711 |  |  |  |  |  |  |  | 148,393 |
Consolidation adjustments |  |  |  |  |  |  | (33,974,121 | ) |  |  | (33,974,121 | ) |  |  | — |  |  |  | (127,628 | ) |  |  | (30,852 | ) |  |  | (32,472 | ) |  |  | — |  |  |  | (49,605 | ) |  |  | — |  |  |  | (169,651 | ) |  |  |  |  |  |  | (291,187 | )
|  | ￦ |  |  |  |  | 57,925,837 |  |  |  | — |  |  |  | 57,925,837 |  |  |  | 11,548,019 |  |  |  | 242,586 |  |  |  | 1,995,425 |  |  |  | 281,107 |  |  |  | 492,288 |  |  |  | 255,346 |  |  |  | 1,832,765 |  |  |  |  |  |  |  | 4,096,620 |
Finance income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,510,249 |
Finance expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,896,443 | )
Gain related to associates, joint ventures and subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 281,107 |
Profit before income tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ￦ |  |  |  |  | 2,991,533 |
(3) | Information related to segment assets and segment liabilities as of and for the years ended December 31, 2019 and 2020 are as follows:
|  |  |  |  | 2019 |
Segment |  |  |  |  | Segment assets |  |  | Investments in associates and joint ventures |  |  | Acquisition of non-current assets |  |  | Segment liabilities |
|  |  |  |  | In millions of won |
Transmission and distribution |  | ￦ |  |  |  |  | 109,809,254 |  |  |  | 3,716,931 |  |  |  | 6,340,593 |  |  |  | 58,350,681 |
Electric power generation (Nuclear) |  |  |  |  |  |  | 59,562,190 |  |  |  | 59,081 |  |  |  | 2,574,358 |  |  |  | 33,909,152 |
Electric power generation (Non-nuclear) |  |  |  |  |  |  | 54,758,933 |  |  |  | 2,088,581 |  |  |  | 4,955,784 |  |  |  | 33,117,193 |
Plant maintenance & engineering service |  |  |  |  |  |  | 3,528,879 |  |  |  | 50,238 |  |  |  | 95,810 |  |  |  | 1,124,855 |
Others |  |  |  |  |  |  | 7,833,516 |  |  |  | — |  |  |  | 344,795 |  |  |  | 3,531,496 |
Segment totals |  |  |  |  |  |  | 235,492,772 |  |  |  | 5,914,831 |  |  |  | 14,311,340 |  |  |  | 130,033,377 |
Consolidation adjustments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Elimination of inter-segment amounts |  |  |  |  |  |  | (39,207,636 | ) |  |  | — |  |  |  | (81,555 | ) |  |  | (6,654,717 | )
Equity method adjustment |  |  |  |  |  |  | 1,791,844 |  |  |  | — |  |  |  | — |  |  |  | — |
Deferred taxes |  |  |  |  |  |  | 2,048 |  |  |  | — |  |  |  | — |  |  |  | 5,329,158 |
Others |  |  |  |  |  |  | (481,236 | ) |  |  | — |  |  |  | — |  |  |  | 325 |
|  |  |  |  |  |  | (37,894,980 | ) |  |  | — |  |  |  | (81,555 | ) |  |  | (1,325,234 | )
Consolidated totals |  | ￦ |  |  |  |  | 197,597,792 |  |  |  | 5,914,831 |  |  |  | 14,229,785 |  |  |  | 128,708,143 |
|  |  |  |  | 2020 |
Segment |  |  |  |  | Segment assets |  |  | Investments in associates and joint ventures |  |  | Acquisition of non-current assets |  |  | Segment liabilities |
|  |  |  |  | In millions of won |
Transmission and distribution |  | ￦ |  |  |  |  | 113,115,667 |  |  |  | 4,204,090 |  |  |  | 6,535,380 |  |  |  | 59,772,046 |
Electric power generation (Nuclear) |  |  |  |  |  |  | 61,850,865 |  |  |  | 116,867 |  |  |  | 2,419,939 |  |  |  | 35,652,467 |
Electric power generation (Non-nuclear) |  |  |  |  |  |  | 54,531,155 |  |  |  | 1,807,409 |  |  |  | 3,758,795 |  |  |  | 33,292,680 |
Plant maintenance & engineering service |  |  |  |  |  |  | 3,492,571 |  |  |  | 42,167 |  |  |  | 141,226 |  |  |  | 1,061,949 |
Others |  |  |  |  |  |  | 8,923,046 |  |  |  | — |  |  |  | 577,056 |  |  |  | 4,039,220 |
Segment totals |  |  |  |  |  |  | 241,913,304 |  |  |  | 6,170,533 |  |  |  | 13,432,396 |  |  |  | 133,818,362 |
Consolidation adjustments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Elimination of inter-segment amounts |  |  |  |  |  |  | (39,762,888 | ) |  |  | — |  |  |  | (30,731 | ) |  |  | (6,749,728 | )
Equity method adjustment |  |  |  |  |  |  | 1,372,001 |  |  |  | — |  |  |  | — |  |  |  | — |
Deferred taxes |  |  |  |  |  |  | 47,664 |  |  |  | — |  |  |  | — |  |  |  | 5,417,629 |
Others |  |  |  |  |  |  | (427,970 | ) |  |  | — |  |  |  | — |  |  |  | (10,998 | )
|  |  |  |  |  |  | (38,771,193 | ) |  |  | — |  |  |  | (30,731 | ) |  |  | (1,343,097 | )
Consolidated totals |  | ￦ |  |  |  |  | 203,142,111 |  |  |  | 6,170,533 |  |  |  | 13,401,665 |  |  |  | 132,475,265 |
(4) | Geographic information
Electricity sales, the main operations of the Company, are conducted in the Republic of Korea. The following information on revenue from external customers and non-current assets is determined by the location of the customers and of the assets:
Geographical unit |  |  |  |  | Revenue from external customers |  |  | Non-current assets(*2) |
|  |  |  | 2018 |  |  | 2019 |  |  | 2020 |  |  | 2018 |  |  | 2019 |  |  | 2020 |
|  |  |  |  | In millions of won |
Domestic |  | ￦ |  |  |  |  | 57,799,991 |  |  |  | 56,942,128 |  |  |  | 56,774,577 |  |  |  | 157,037,428 |  |  |  | 169,366,365 |  |  |  | 173,673,478 |
Overseas(*1) |  |  |  |  |  |  | 2,233,071 |  |  |  | 1,625,954 |  |  |  | 1,151,260 |  |  |  | 3,299,346 |  |  |  | 2,743,755 |  |  |  | 2,831,925 |
|  | ￦ |  |  |  |  | 60,033,062 |  |  |  | 58,568,082 |  |  |  | 57,925,837 |  |  |  | 160,336,774 |  |  |  | 172,110,120 |  |  |  | 176,505,403 |
| (*1) | Middle East and other Asian countries make up the majority of overseas revenue and non-current assets. Since the overseas revenue or non-current assets attributable to particular countries are not material, they are not disclosed individually.
| (*2) | The amounts exclude financial assets and deferred tax assets.
(5) | Information on significant customers
There is no single customer which accounts for 10% or more of the Company’s revenue for the years ended December 31, 2018, 2019 and 2020.

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