XML 132 R116.htm IDEA: XBRL DOCUMENT v3.21.1
Geographical areas (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue      
Electricity ₩ 55,730,985 ₩ 55,939,001 ₩ 56,842,011
Heat supply 198,715 220,948 216,117
Others 754,612 734,927 839,676
Sales of goods 56,684,312 56,894,876 57,897,804
Sales of services 429,350 408,290 392,867
Sales of construction services 812,175 1,264,916 1,742,391
Total revenue from external customers 57,925,837 58,568,082 60,033,062
Non-current assets [1] 176,505,403 172,110,120 160,336,774
Domestic      
Revenue      
Electricity 55,730,985 55,939,001 56,842,011
Heat supply 198,715 220,948 216,117
Others 450,908 449,381 456,738
Sales of goods 56,380,608 56,609,330 57,514,866
Sales of services 223,075 222,106 176,539
Sales of construction services 170,895 110,692 108,586
Total revenue from external customers 56,774,578 56,942,128 57,799,991
Non-current assets [1] 173,673,478 169,366,365 157,037,428
Overseas      
Revenue      
Electricity 0 0 0
Heat supply 0 0 0
Others 303,704 285,546 382,938
Sales of goods 303,704 285,546 382,938
Sales of services 206,275 186,184 216,328
Sales of construction services 641,280 1,154,224 1,633,805
Total revenue from external customers [2] 1,151,259 1,625,954 2,233,071
Non-current assets [1],[2] ₩ 2,831,925 ₩ 2,743,755 ₩ 3,299,346
[1] The amounts exclude financial assets and deferred tax assets.
[2] 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.