
		2019
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	￦		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	)

	￦		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																														￦		(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

Loss before income tax																														￦		2,991,533


		2021
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	￦		58,999,388			1,672,776			57,326,612		3,990,464			36,831			678,986			391,116			193,412			202,262		1,194,643			(7,244,319	)
Electric power generation (Nuclear)			9,324,391			9,207,516			116,875		3,611,594			22,209			477,512			(18,146	)		86,730			—		680,358			762,164
Electric power generation (Non-nuclear)			25,837,982			24,518,167			1,319,815		4,178,520			22,226			624,391			109,765			121,020			5,672		285,152			364,572
Plant maintenance & engineering service			2,805,785			2,370,900			434,885		121,493			9,515			933			11,849			94,269			—		213,500			245,360
Others			2,010,843			1,295,423			715,420		158,952			158,680			162,345			—			52,698			—		2,981			200,363
Consolidation adjustments			(39,064,782	)		(39,064,782	)		—		(122,751	)		(27,587	)		(29,710	)		—			(36,187	)		—		89,818			(64,775	)

	￦		59,913,607			—			59,913,607		11,938,272			221,874			1,914,457			494,584			511,942			207,934		2,466,452			(5,736,635	)

Finance income																															1,402,614

Finance expense																															(3,245,777	)

Gain related to associates, joint ventures and subsidiaries																															494,584

Profit before income tax																													￦		(7,085,214	)

(3)	Information related to segment assets and segment liabilities as of and for the years ended December 31, 2020 and 2021 are as follows:


		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


		2021
Segment		Segment assets			Investments in associates and joint ventures		Acquisition of non-current assets			Segment liabilities
		In millions of won
Transmission and distribution	￦		115,578,517			4,700,863		6,754,298			68,531,927
Electric power generation (Nuclear)			64,628,651			141,885		1,959,479			38,361,337
Electric power generation (Non-nuclear)			57,304,296			2,575,019		3,331,813			35,803,289
Plant maintenance & engineering service			3,672,366			53,617		110,330			1,086,926
Others			10,861,823			—		637,715			4,961,880

Segment totals			252,045,653			7,471,384		12,793,635			148,745,359

Consolidation adjustments:
Elimination of inter-segment amounts			(41,701,400	)		—		(12,001	)		(8,101,011	)
Equity method adjustment			1,866,554			—		—			—
Deferred taxes			1,881			—		—			5,248,627
Others			(1,103,818	)		—		—			(95,954	)

			(40,936,783	)		—		(12,001	)		(2,948,338	)

Consolidated totals	￦		211,108,870			7,471,384		12,781,634			145,797,021

(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:


		Revenue from external customers						Non-current assets (*2)
Geographical unit		2019		2020		2021		2019		2020		2021
		In millions of won
Domestic	￦		56,942,128		56,774,578		58,672,484		169,366,365		173,673,478		178,745,707
Overseas (*1)			1,625,954		1,151,259		1,241,123		2,743,755		2,831,925		3,572,784

	￦		58,568,082		57,925,837		59,913,607		172,110,120		176,505,403		182,318,491

(*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, 2019, 2020 and 2021.