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Intangible Assets other than Goodwill (Tables)

12 Months Ended

Dec. 31, 2023

Disclosure of detailed information about intangible assets [abstract]

Summary of Intangible Asset Explanatory

(1)	Intangible assets as of December 31, 2022 and 2023 are as follows:


						2022
						Acquisition cost				Government grants				Accumulated amortization				Accumulated impairment losses				Book value

						In millions of won
Software		￦					1,002,040				(174	)			(799,013	)			(20	)			202,833
Copyrights, patents rights and other industrial rights							104,559				—				(67,368	)			(9,178	)			28,013
Mining rights							625,845				—				(46,187	)			(541,133	)			38,525
Development expenditures							938,032				(3,477	)			(883,527	)			—				51,028
Intangible assets under development							76,625				(2,108	)			—				(8,903	)			65,614
Usage rights of donated assets and others							592,797				—				(435,518	)			(136	)			157,143
Leasehold rights							28,185				—				(23,297	)			—				4,888
Greenhouse gas emissions rights							43,960				—				—				—				43,960
Others							551,396				(67	)			(174,714	)			(11,955	)			364,660

		￦					3,963,439				(5,826	)			(2,429,624	)			(571,325	)			956,664


						2023
						Acquisition cost				Government grants				Accumulated amortization				Accumulated impairment losses				Book value

						In millions of won
Software		￦					1,083,537				(413	)			(885,677	)			(19	)			197,428
Copyrights, patents rights and other industrial rights							105,827				—				(73,158	)			(9,178	)			23,491
Mining rights							643,625				—				(57,549	)			(553,911	)			32,165
Development expenditures							966,530				(2,121	)			(911,096	)			—				53,313
Intangible assets under development							94,916				(2,458	)			—				(8,903	)			83,555
Usage rights of donated assets and others							592,739				—				(447,352	)			(136	)			145,251
Leasehold rights							28,185				—				(24,256	)			—				3,929
Greenhouse gas emissions rights							107,086				—				—				—				107,086
Others							599,958				(322	)			(199,865	)			(12,005	)			387,766

		￦					4,222,403				(5,314	)			(2,598,953	)			(584,152	)			1,033,984

Summary of Changes in Intangible Assets

(2)	Changes in intangible assets for the years ended December 31, 2022 and 2023 are as follows:


						2022
						Beginning balance				Acquisition				Disposal				Amortization				Reversal				Others				Ending balance

						In millions of won
Software		￦					162,596				22,532				(57	)			(84,649	)			—				102,585				203,007
(Government grants)							(91	)			—				—				60				—				(143	)			(174	)
Copyrights, patents rights and other industrial rights							35,187				270				(37	)			(7,136	)			—				(271	)			28,013
Mining rights							41,902				2,395				—				(4,296	)			—				(1,476	)			38,525
Development expenditures							72,944				—				—				(24,238	)			—				5,799				54,505
(Government grants)							(3,820	)			—				—				1,466				—				(1,123	)			(3,477	)
Intangible assets under development							81,430				39,559				—				—				(14	)			(53,253	)			67,722
(Government grants)							(7,326	)			—				—				—				—				5,218				(2,108	)
Usage rights of donated assets and others							169,783				—				—				(11,394	)			(150	)			(1,096	)			157,143
Leasehold rights							5,848				—				—				(960	)			—				—				4,888
Greenhouse gas emissions rights							78,137				57,466				—				—				—				(91,643	)			43,960
Others							407,558				4,073				(260	)			(25,017	)			—				(21,627	)			364,727
(Government grants)							(71	)			—				—				4				—				—				(67	)

		￦					1,044,077				126,295				(354	)			(156,160	)			(164	)			(57,030	)			956,664


						2023
						Beginning balance				Acquisition				Disposal				Amortization				Impairment				Others				Ending balance

						In millions of won
Software		￦					203,007				12,837				(18	)			(86,174	)			—				68,189				197,841
(Government grants)							(174	)			—				—				85				—				(324	)			(413	)
Copyrights, patents rights and other industrial rights							28,013				319				(70	)			(4,918	)			(180	)			327				23,491
Mining rights							38,525				2,164				—				(10,289	)			—				1,765				32,165
Development expenditures							54,505				—				—				(25,614	)			—				26,543				55,434
(Government grants)							(3,477	)			—				—				1,356				—				—				(2,121	)
Intangible assets under development							67,722				51,282				—				—				—				(32,991	)			86,013
(Government grants)							(2,108	)			—				—				—				—				(350	)			(2,458	)
Usage rights of donated assets and others							157,143				—				—				(11,857	)			—				(35	)			145,251
Leasehold rights							4,888				—				—				(959	)			—				—				3,929
Greenhouse gas emissions rights							43,960				8,577				(1	)			(2	)			—				54,552				107,086
Others							364,727				4,136				(119	)			(24,895	)			(103	)			44,342				388,088
(Government grants)							(67	)			—				—				93				—				(348	)			(322	)

		￦					956,664				79,315				(208	)			(163,174	)			(283	)			161,670				1,033,984

Summary of Significant Specific Intangible Assets

(3)	Significant specific intangible assets as of December 31, 2022 and 2023 are as follows:


2022
Type		Description		Currency		Amount				Remaining useful lives

		In millions of won and thousands of Australian dollars
Software		ORACLE license for SDIS integrated DB		KRW			5,509			3 years and 4 months
Copyrights, patents rights and other industrial rights		Contributions to APR NRC DC		KRW			20,871			5 years
Mining rights		Mining rights of Bylong mine		AUD			—			— (*)
Usage rights of donated assets and others		Sejong Haengbogdosi sharing charge		KRW			17,772			3 years and 11 months
		Right of use electricity and gas supply facility (Community district of Songdo)		KRW			7,908			7 years and 6 months
Others		Occupancy and use of public waters		KRW			76,212			14 years and 1 month
		Greenhouse gas emissions rights		KRW			43,960			—
		Business rights		KRW			154,712			26 years and 11 months

(*) The carrying amount of mining rights is nil, because KEPCO Australia Pty., Ltd. and KEPCO Bylong Australia Pty., Ltd. had recognized impairment losses in full.


2023
Type		Description		Currency		Amount				Remaining useful lives

		In millions of won and thousands of Australian dollars
Software		S/4HANA ERP license		KRW			5,742			3 years and 11 months
Copyrights, patents rights and other industrial rights		Contributions to APR NRC DC		KRW			16,697			4 years
Mining rights		Mining rights of Bylong mine		AUD			—			— (*)
Usage rights of donated assets and others		Sejong Haengbogdosi sharing charge		KRW			13,235			2 years and 11 months
		Right of use electricity and gas supply facility (Community district of Songdo)		KRW			6,853			6 years and 6 months
Others		Occupancy and use of public waters		KRW			70,800			13 years and 1 month
		Greenhouse gas emissions rights		KRW			107,086			—
		Business rights		KRW			148,964			25 years and 11 months

(*) The carrying amount of mining rights is nil, because KEPCO Australia Pty., Ltd. and KEPCO Bylong Australia Pty., Ltd. had recognized impairment losses in full.

Summary of Recognized Research and Development Expenses

(4)	For the years ended December 31, 2021, 2022 and 2023, the Company recognized research and development expenses of ￦ 689,397 million, ￦ 727,810 million, and ￦ 717,561 million, respectively.