Segment, Geographic and Other Information (Tables)

12 Months Ended

Dec. 31, 2022

Disclosure of operating segments [abstract]

Summary of Financial Information of the Segments

(2)	Financial information of the segments for the years ended December 31, 2020, 2021 and 2022, respectively, are as follows:



		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			1,582,798			1,096,663			486,135		122,092			167,005			162,843			—			50,889			940		3,711				149,607
Consolidation adjustments			(33,974,121	)		(33,974,121	)		—		(127,628	)		(30,852	)		(32,472	)		—			(49,605	)		—		(169,651	)			(291,187	)

	￦		57,926,634			—			57,926,634		11,548,019			242,586			1,995,425			281,107			492,288			255,346		1,832,765				4,097,834

Finance income																																1,510,249

Finance expense																																(2,896,443	)

Gain related to associates, joint ventures and subsidiaries																																281,107

Loss before income tax																														￦		2,992,747

		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)			25,928,596			24,518,167			1,410,429		4,182,470			22,226			624,391			109,765			121,020			5,672		285,152			370,440
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			2,018,997			1,295,423			723,574		159,222			158,680			162,345			—			52,698			—		2,981			208,139
Consolidation adjustments			(39,064,782	)		(39,064,782	)		—		(122,751	)		(27,587	)		(29,710	)		—			(36,187	)		—		89,818			(64,775	)

	￦		60,012,375			—			60,012,375		11,942,492			221,874			1,914,457			494,584			511,942			207,934		2,466,452			(5,722,991	)

Finance income																															1,402,614

Finance expense																															(3,245,777	)

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

Profit before income tax																													￦		(7,071,570	)


		2022
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	￦		68,239,707			1,922,354			66,317,353		4,130,004			67,076			1,420,802			980,146			180,114			157,784		611,534			(33,623,874	)
Electric power generation (Nuclear)			10,386,091			10,254,271			131,820		4,034,774			45,789			557,218			(753	)		82,466			—		624,221			761,109
Electric power generation (Non-nuclear)			41,944,339			39,252,851			2,691,488		4,091,081			53,242			694,559			329,112			140,067			—		619,947			289,001
Plant maintenance & engineering service			2,975,062			2,516,699			458,363		123,168			14,003			1,405			1,886			82,070			—		213,671			239,529
Others			2,750,231			1,803,231			947,000		211,719			195,966			195,860			—			53,017			3,125		9,463			333,547
Consolidation adjustments			(55,749,406	)		(55,749,406	)		—		(129,334	)		(35,323	)		(51,298	)		—			(52,034	)		—		68,143			(239,843	)

	￦		70,546,024			—			70,546,024		12,461,412			340,753			2,818,546			1,310,391			485,700			160,909		2,146,979			(32,240,531	)

Finance income																															1,833,312

Finance expense																															(4,746,791	)

Gain related to associates, joint ventures and subsidiaries																															1,310,391

Profit before income tax																													￦		(33,843,619	)

Summary of Information Related to Segment Assets and Liabilities

(3)	Information related to segment assets and segment liabilities as of and for the years ended December 31, 2021 and 2022 are as follows:


		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)			57,310,164			2,575,019		3,341,960			35,803,289
Plant maintenance & engineering service			3,672,366			53,617		110,330			1,086,926
Others			10,870,812			—		645,760			4,961,880

Segment totals			252,060,510			7,471,384		12,811,827			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	￦		211,123,727			7,471,384		12,799,826			145,797,021


		2022
Segment		Segment assets			Investments in associates and joint ventures		Acquisition of non-current assets			Segment liabilities
		In millions of won
Transmission and distribution	￦		131,023,727			5,678,141		6,055,179			108,963,058
Electric power generation (Nuclear)			69,129,625			143,304		2,008,409			42,843,974
Electric power generation (Non-nuclear)			69,468,039			3,113,918		3,547,815			40,428,907
Plant maintenance & engineering service			4,051,157			56,685		200,338			1,272,408
Others			12,895,981			—		839,885			5,796,718

Segment totals			286,568,529			8,992,048		12,651,626			199,305,065

Consolidation adjustments:
Elimination of inter-segment amounts			(43,801,723	)		—		(38,633	)		(9,304,648	)
Equity method adjustment			2,859,623			—		—			—
Deferred taxes			(452	)		—		—			2,801,832
Others			(10,820,983	)		—		—			2,489

			(51,763,535	)		—		(38,633	)		(6,500,327	)

Consolidated totals	￦		234,804,994			8,992,048		12,612,993			192,804,738

Summary of Geographic Information

(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		2020		2021		2022		2020		2021		2022
		In millions of won
Domestic	￦		56,775,375		58,771,252		69,142,730		173,673,478		178,760,564		183,707,117
Overseas (*1)			1,151,259		1,241,123		1,403,294		2,831,925		3,572,784		4,724,416

	￦		57,926,634		60,012,375		70,546,024		176,505,403		182,333,348		188,431,533

(*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.