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Risk Management (Tables)

12 Months Ended

Dec. 31, 2022

Risk Management [Abstract]

Summary of Capital Risk Management

Details of the Company’s capital management accounts as of December 31, 2021 and 2022 are as follows:

						2021				2022
						In millions of won
Total borrowings and debt securities		￦					80,529,513				120,605,365
Cash and cash equivalents							2,635,238				3,234,780
Net borrowings and debt securities							77,894,275				117,370,585
Total equity							65,326,706				42,000,256
Debt to equity ratio							119.24	%			279.45	%

Summary of Maximum Exposure to Credit Risk

Book values of the financial assets represent the maximum exposed amounts of the credit risk. Details of the Company’s level of maximum exposure to credit risk as of December 31, 2021 and 2022 are as follows:

						2021				2022
						In millions of won
Cash and cash equivalents		￦					2,635,238				3,234,780
Financial assets at fair value through profit or loss(*1)							932,736				3,610,408
Derivative assets (trading)							443,027				693,072
Financial assets at fair value through other comprehensive income (debt securities)							491				529
Financial assets at amortized cost							25,273				26,998
Loans							909,071				1,013,371
Long-term/short-term financial instruments							1,728,508				1,353,080
Derivative assets (applying hedge accounting)							204,756				324,952
Trade and other receivables							10,029,276				12,614,902
Financial guarantee contracts(*2)							3,718,015				3,776,060

(*1) Equity investments held by the Company are excluded.

(*2) Maximum exposure associated with the financial guarantee contracts is the maximum amounts of the obligation.

As of the reporting date, there are no financial assets and non-financial assets that were acquired through the exercise of the right of collateralized assets and reinforcement of credit arrangement.

Summary of Sensitivity Analysis for Actuarial Assumptions

A sensitivity analysis of defined benefit obligation assuming a 1% increase and decrease movements in the actuarial valuation assumptions as of December 31, 2021 and 2022 are as follows:

								2021								2022
Type		Accounts						1% Increase				1% Decrease				1% Increase				1% Decrease
								In millions of won
Future salary increases		Increase (decrease) in defined benefit obligation		￦					466,832				(407,554	)			321,930				(283,658	)
Discount rate		Increase (decrease) in defined benefit obligation							(422,290	)			499,571				(289,229	)			337,033

Changes of employee benefits assuming a 1% increase and decrease movements in discount rate on plan asset for the years ended December 31, 2021 and 2022 are ￦25,649 million and ￦27,495 million, respectively.

Summary of Principal Assumptions on Provisions Valuation

Changes in provisions due to movements in underlying assumptions as of December 31, 2021 and 2022 are as follows:

Type		Accounts		2021				2022
PCBs		Inflation rate			1.37	%			1.98	%
		Discount rate			1.88	%			1.92	%
Nuclear plants		Inflation rate			1.41	%			2.25	%
		Discount rate			2.20	%			2.48	%
Spent fuel		Inflation rate			2.93	%			2.93	%
		Discount rate			4.49	%			4.49	%
Radioactive waste		Inflation rate			1.00	%			3.06	%
		Discount rate			1.87	%			2.62	%

Summary of Sensitivity Analysis for Provisions Assumptions

A sensitivity analysis of provisions assuming a 0.1% increase and decrease movements in the underlying assumptions as of December 31, 2021 and 2022 are as follows:

								2021								2022
Type		Accounts						0.1% Increase				0.1% Decrease				0.1% Increase				0.1% Decrease
								In millions of won
Discount rate		PCBs		￦					(222	)			223				(169	)			169
		Nuclear plants							(369,540	)			381,026				(474,432	)			491,360
		Spent fuel							(51,430	)			53,438				(54,330	)			56,453
		Radioactive waste							(11,201	)			11,306				(15,089	)			15,260
Inflation rate		PCBs							224				(224	)			169				(169	)
		Nuclear plants							403,420				(391,754	)			515,262				(498,258	)
		Spent fuel							54,210				(52,245	)			57,269				(55,191	)
		Radioactive waste							10,366				(10,288	)			14,190				14,056

Summary of Foreign Currency Risk

The Company undertakes transactions denominated in foreign currencies; consequently, exposures to exchange rate fluctuations arise. The carrying amounts of the Company’s foreign currency denominated monetary assets and monetary liabilities as of December 31, 2021 and 2022 are as follows:

		Assets								Liabilities
Type		2021				2022				2021				2022
		In thousands of foreign currencies
AED			6,481				5,610				31,637				25,597
AUD			3,733				4,448				926,960				299,663
BDT			50,145				7,514				577				—
BWP			939				824				—				—
EGP			—				—				595				1,162
CAD			582				89				2,266				595
CHF			—				—				500,230				500,158
CZK			—				—				386				153
EUR			1,809				1,976				42,981				41,073
GBP			—				—				—				31
HKD			—				—				1,651,665				4,014,446
IDR			768,731				598,697				995,510				1,323,840
INR			1,715,900				1,592,380				342,833				312,978
JOD			1,852				1,146				118				14
JPY			697,747				568,263				153,383				1,719,846
KZT			1,510				1,510				—				—
MGA			4,262,857				2,856,045				475,807				347,403
MMK			210,335				199,518				—				—
MYR			1,964				38,177				—				—
PHP			164,167				68,592				104,245				7,493
PKR			200,844				533,816				74,423				219,341
RUB			—				—				—				2,881
SAR			2,615				1,713				—				9,710
SEK			—				—				449,167				449,211
THB			—				—				—				389
USD			1,381,441				1,484,614				12,023,085				13,599,643
UYU			90,930				128,674				3,097				3,106
VND			952,135				1,184,670				262,372				4,495
ZAR			31,971				43,461				—				—

Summary of Sensitivity Analysis for Foreign Currency Exchange Rates

A sensitivity analysis on the Company’s income for the period assuming a 10% increase and decrease in currency exchange rates as of December 31, 2021 and 2022 are as follows:

						2021								2022
Type						10% Increase				10% Decrease				10% Increase				10% Decrease
						In millions of won
Increase (decrease) of profit before income tax		￦					(1,439,185	)			1,439,185				(1,703,053	)			1,703,053
Increase (decrease) of equity(*)							(1,439,185	)			1,439,185				(1,703,053	)			1,703,053

(*) The effect on the shareholders’ equity excluding the impact of income taxes.

Summary of Interest Rate Risk

The Company’s borrowings and debt securities with floating interest rates as of December 31, 2021 and 2022 are as follows:

Type						2021				2022
						In millions of won
Short-term borrowings		￦					391,897				3,154,972
Long-term borrowings							2,405,244				5,388,073
Debt securities							257,667				269,101
		￦					3,054,808				8,812,146

Summary of Sensitivity Analysis for Interest Rates

A sensitivity analysis on the Company’s long-term borrowings and debt securities assuming a 1% increase and decrease in interest rates, without consideration of hedge effect of related derivatives for the years ended December 31, 2021 and 2022 are as follows:

						2021								2022
Type						1% Increase				1% Decrease				1% Increase				1% Decrease
						In millions of won
Increase (decrease) of profit before income tax		￦					(30,548	)			30,548				(88,121	)			88,121
Increase (decrease) of shareholder’s equity(*)							(30,548	)			30,548				(88,121	)			88,121

(*) The effect on the shareholders’ equity excluding the impact of income taxes.

Summary of Sensitivity Analysis for Electricity Rates

A sensitivity analysis on the Company’s income for the period assuming a 1% increase and decrease in price of electricity for the years ended December 31, 2021 and 2022 is as follows: 

						2021								2022
Type						1% Increase				1% Decrease				1% Increase				1% Decrease
						In millions of won
Increase (decrease) of profit before income tax		￦					573,086				(573,086	)			661,990				(661,990	)
Increase (decrease) of shareholder’s equity(*)							573,086				(573,086	)			661,990				(661,990	)

(*) The effect on the equity excluding the impact of income taxes.

Summary of Maturity Analysis for Non Derivative Financial Liabilities

The expected maturities for non-derivative financial liabilities as of December 31, 2021 and 2022 in detail are as follows:

						2021
Type						Less than 1 year				1~2 Years				2~5 Years				More than 5 years				Total
						In millions of won
Borrowings and debt securities		￦					15,833,589				11,229,657				28,663,693				36,223,543				91,950,482
Lease liabilities							620,121				636,724				1,521,421				2,150,722				4,928,988
Trade and other payables							7,569,869				777,017				725,231				667,304				9,739,421
Financial guarantee contracts(*)							435,729				—				3,105,599				176,687				3,718,015
		￦					24,459,308				12,643,398				34,015,944				39,218,256				110,336,906

						2022
Type						Less than 1 year				1~2 Years				2~5 Years				More than 5 years				Total
						In millions of won
Borrowings and debt securities		￦					26,157,747				27,367,577				47,361,676				37,115,832				138,002,832
Lease liabilities							639,756				657,210				1,390,374				1,925,012				4,612,352
Trade and other payables							11,369,512				347,563				1,008,133				734,112				13,459,320
Financial guarantee contracts(*)							105,091				54,310				3,495,437				121,222				3,776,060
		￦					38,272,106				28,426,660				53,255,620				39,896,178				159,850,564

(*) This represents the total guarantee amounts associated with the financial guarantee contracts. Financial guarantee liabilities which are recognized as of December 31, 2021 and 2022 are ￦80,841 million and ￦67,240 million, respectively.

Summary of Maturity Analysis for Non Derivative Financial Assets

The expected maturities for non-derivative financial assets as of December 31, 2021 and 2022 in detail are as follows:

						2021
Type						Less than 1 year				1~5 Years				More than 5 years				Other(*)				Total
						In millions of won
Cash and cash equivalents		￦					2,635,238				—				—				—				2,635,238
Financial assets at fair value through other comprehensive income							—				—				—				435,107				435,107
Financial assets at amortized cost							15,422				9,840				11				—				25,273
Loans							88,396				443,146				407,584				—				939,126
Long-term/short-term financial instruments							1,278,014				171,636				286				278,572				1,728,508
Financial assets at fair value through profit or loss							360,833				346				3,130				668,555				1,032,864
Trade and other receivables							8,123,455				1,233,703				679,048				—				10,036,206
		￦					12,501,358				1,858,671				1,090,059				1,382,234				16,832,322

						2022
Type						Less than 1 year				1~5 Years				More than 5 years				Other(*)				Total
						In millions of won
Cash and cash equivalents		￦					3,234,780				—				—				—				3,234,780
Financial assets at fair value through other comprehensive income											—				—				502,829				502,829
Financial assets at amortized cost							16,762				10,231				5				—				26,998
Loans							132,877				411,594				502,050				—				1,046,521
Long-term/short-term financial instruments							666,758				—				25				686,297				1,353,080
Financial assets at fair value through profit or loss							3,181,791				645				3,535				523,537				3,709,508
Trade and other receivables							10,464,191				1,083,593				1,080,831				—				12,628,615
		￦					17,697,159				1,506,063				1,586,446				1,712,663				22,502,331

(*) The maturities cannot be presently determined.

Summary of Maturity Analysis for Derivative, Undiscounted Cash Flows

Derivative liabilities classified by maturity periods which from reporting date to maturity dates as per the contracts as of December 31, 2021 and 2022 are as follows:

						2021
Type						Less than 1 year				1~2 Years				2~5 Years				More than 5 years				Total
						In millions of won
Net settlement
—Trading		￦					—				—				—				—				—
Gross settlement
—Trading and others							(6,628	)			(4,954	)			(33,635	)			(2,291	)			(47,508	)
—Hedging							(2,555	)			(638	)			(1,914	)			(23,704	)			(28,811	)
		￦					(9,183	)			(5,592	)			(35,549	)			(25,995	)			(76,319	)
						2022
Type						Less than 1 year				1~2 Years				2~5 Years				More than 5 years				Total
						In millions of won
Net settlement
—Trading		￦					—				—				—				—				—
Gross settlement
—Trading and others							(42,663	)			(15,225	)			(171,130	)			(84,924	)			(313,942	)
—Hedging							—				(10,064	)			(5,176	)			(10,265	)			(25,505	)
		￦					(42,663	)			(25,289	)			(176,306	)			(95,189	)			(339,447	)

Summary of Maturity Analysis for Derivative Financial Assets

Derivative assets classified by maturity periods which from reporting date to maturity dates as per the contracts as of December 31, 2021 and 2022 are as follows:

						2021
Type						Less than 1 year				1~2 Years				2~5 Years				More than 5 years				Total
						In millions of won
Net settlement
—Trading		￦					—				—				—				—				—
Gross settlement
—Trading							93,554				54,617				202,663				105,856				456,690
—Hedging							33,564				65,198				102,760				3,235				204,757
		￦					127,118				119,815				305,423				109,091				661,447
						2022
Type						Less than 1 year				1~2 Years				2~5 Years				More than 5 years				Total
						In millions of won
Net settlement
—Trading		￦					—				—				—				—				—
Gross settlement
—Trading							861,621				160,938				(352,657	)			65,661				735,563
—Hedging							134,390				47,502				131,258				—				313,150
		￦					996,011				208,440				(221,399	)			65,661				1,048,713

Summary of Fair Value Measurement of Instruments

Fair value and book value of financial assets and liabilities as of December 31, 2021 and 2022 are as follows:

						2021								2022
Type						Book value				Fair value				Book value				Fair value
						In millions of won
Assets recognized at fair value
Financial assets at fair value through other comprehensive income		￦					435,107				435,107				502,829				502,829
Derivative assets (trading)							443,027				443,027				693,072				693,072
Derivative assets (hedge designated)							204,756				204,756				324,952				324,952
Financial assets at fair value through profit or loss							1,032,864				1,032,864				3,709,508				3,709,508
		￦					2,115,754				2,115,754				5,230,361				5,230,361
Assets carried at amortized cost
Financial assets at amortized cost		￦					25,273				25,273				26,998				26,998
Loans and receivables							909,071				909,071				1,013,371				1,013,371
Trade and other receivables							10,029,276				10,029,276				12,614,902				12,614,902
Long-term financial instruments							450,494				450,494				686,322				686,322
Short-term financial instruments							1,278,014				1,278,014				666,758				666,758
Cash and cash equivalents							2,635,238				2,635,238				3,234,780				3,234,780
		￦					15,327,366				15,327,366				18,243,131				18,243,131
Liabilities recognized at fair value
Derivative liabilities (trading)		￦					56,256				56,256				407,246				407,246
Derivative liabilities (hedge designated)							21,775				21,775				25,505				25,505
		￦					78,031				78,031				432,751				432,751
Liabilities carried at amortized cost
Secured borrowings		￦					176,358				176,358				102,368				102,368
Unsecured bond							73,881,671				69,803,043				105,185,189				96,846,056
Lease liabilities							4,410,503				4,410,503				4,163,143				4,163,143
Unsecured borrowings							6,471,484				5,938,613				15,282,193				15,280,693
Trade and other payables(*)							9,739,421				9,739,421				13,459,320				13,459,320
Bank overdraft							—				—				35,615				35,615
		￦					94,679,437				90,067,938				138,227,828				129,887,195

(*) Excludes lease liabilities.

Summary of Significant Unobservable Inputs Used in Fair Value Measurement of Liabilities

The discount rates used for calculating fair value as of December 31, 2021 and 2022 are as follows:

Type		2021				2022
Derivatives			(-) 0.63% ~ 3.88%				0.60% ~ 7.93%
Borrowings and debt securities			(-) 0.30% ~ 4.38%				0.75% ~ 5.84%
Finance lease			0.00% ~ 16.83%				0.00% ~ 17.08%

Summary of Fair Value Measurement of Liabilities

Fair values of financial instruments by hierarchy level as of December 31, 2021 and 2022 are as follows:

						2021
Type						Level 1				Level 2				Level 3				Total
						In millions of won
Financial assets at fair value
Financial assets at fair value through other comprehensive income		￦					273,826				—				161,281				435,107
Derivative assets							—				647,783				—				647,783
Financial assets at fair value through profit or loss							—				1,027,067				5,797				1,032,864
		￦					273,826				1,674,850				167,078				2,115,754
Financial liabilities at fair value
Derivative liabilities		￦					—				78,031				—				78,031
						2022
Type						Level 1				Level 2				Level 3				Total
						In millions of won
Financial assets at fair value
Financial assets at fair value through other comprehensive income		￦					300,057				—				202,772				502,829
Derivative assets							—				1,018,024				—				1,018,024
Financial assets at fair value through profit or loss							—				3,703,179				6,329				3,709,508
		￦					300,057				4,721,203				209,101				5,230,361
Financial liabilities at fair value
Derivative liabilities		￦					—				432,751				—				432,751

Summary of Reconciliation of Changes in Fair Value Measurement, Assets

Changes of financial assets and liabilities which are classified as level 3 for the years ended December 31, 2021 and 2022 are as follows:

						2021
						Beginning balance				Acquisitions				Reclassified category				Valuation				Disposal				Foreign currency translation and others				Ending balance
						In millions of won
Financial assets at fair value
Financial assets at fair value through profit or loss Cooperative		￦					5,692				—				—				105				—				—				5,797
Financial assets at fair value through other comprehensive income
Unlisted securities							163,889				8,929				—				(12,335	)			(13	)			320				160,790
Debt securities							—				500				—				—				—				(9	)			491
						2022
						Beginning balance				Acquisitions				Reclassified category				Valuation				Disposal				Foreign currency translation and others				Ending balance
						In millions of won
Financial assets at fair value
Financial assets at fair value through profit or loss Cooperative		￦					5,797				400				—				132				—				—				6,329
Financial assets at fair value through other comprehensive income
Unlisted securities							160,790				9,451				—				33,237				—				(1,235	)			202,243
Debt securities							491				—				—				38				—				—				529

X

- Definition

The disclosure of an analysis of the present value of a defined benefit obligation that distinguishes the nature, characteristics and risks of the obligation. Such a disclosure could distinguish: (a) between amounts owing to active members, deferred members, and pensioners; (b) between vested benefits and accrued but not vested benefits; and (c) between conditional benefits, amounts attributable to future salary increases and other benefits. [Refer: Defined benefit obligation, at present value]

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