Deferred Tax Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2025

Textblock 1 [Abstract]

Summary of Recovery and Settlement Timings

(a)Details of the recovery and settlement timings for deferred tax assets and liabilities as of December 31, 2024 and 2025 are as follows:

(In millions of won)		2024		2025
Deferred tax assets
Deferred tax asset to be recovered after more than 12 months	W		3,694,831		3,703,599
Deferred tax asset to be recovered within 12 months			493,850		372,278
Total deferred tax assets			4,188,681		4,075,877
Deferred tax liabilities
Deferred tax liability to be settled after more than 12 months	W		496,851		455,001
Deferred tax liability to be settled within 12 months			187,653		110,720
Total deferred tax liabilities			684,504		565,721
Deferred tax assets after offsetting	W		3,504,177		3,510,156

Changes in Deferred Tax Assets and Liabilities

(b)Changes in deferred tax assets and liabilities for the years ended December 31, 2024 and 2025 are as follows:

(In millions of won)		January 1, 2024			Profit or loss for 2024			Other comprehensive income (loss) and others for 2024			Classified as held for sale			December 31, 2024			Profit or loss for 2025			Other comprehensive income (loss) and others for 2025			December 31, 2025
Other accounts Receivable	W		(61	)		(4,409	)		—			—			(4,470	)		(4,056	)		—			(8,526	)
Inventories			51,728			12,897			—			(1,498	)		63,127			24,610			—			87,737
Defined benefits assets and others			(89,753	)		53,721			22,368			—			(13,664	)		(26,541	)		(7,065	)		(47,270	)
Subsidiaries and associates			(89,649	)		(3,731	)		(56,999	)		—			(150,379	)		(25,231	)		57,752			(117,858	)
Accrued expenses			97,867			8,902			—			(176	)		106,593			28,090			—			134,683
Property, plant and equipment and    intangible Assets			577,308			(58,721	)		—			60,747			579,334			(200,533	)		—			378,801
Provisions			39,586			(4,666	)		—			—			34,920			(2,151	)		—			32,769
Other temporary differences			58,731			(8,413	)		—			(15,100	)		35,218			(11,584	)		—			23,634
Tax loss carryforwards			2,766,820			14,365			—			(72,338	)		2,708,847			162,117			—			2,870,964
Tax credit carryforwards			148,215			(3,564	)		—			—			144,651			10,571			—			155,222
Deferred tax assets (liabilities)	W		3,560,792			6,381			(34,631	)		(28,365	)		3,504,177			(44,708	)		50,687			3,510,156

Details Of Deductible (Taxable) Temporary Differences, Tax Credit Carryforwards and Tax Credit Carryforwards Unrecognized As Deferred Tax Assets (Liabilities)

(c)Details of deductible (taxable) temporary difference, tax credit carryforwards and tax loss carryforwards unrecognized as deferred tax assets (liabilities) as of December 31, 2025, are as follows:

(In millions of won)		Amount			Reason
Investments with its subsidiary	W		(1,115,322	)	Unlikely to reverse (dispose of) in the foreseeable future
Tax credit carryforwards (*1)			1,081,726		Uncertainty of future taxable profit
Tax loss carryforwards (*2)			2,021,561		Uncertainty of future taxable profit

(*1) Unrecognized tax credit carryforwards due to the low probability of realization in the future as of December 31, 2025, will be expired from 2026.

(*2) Unrecognized tax loss carryforwards due to the low probability of realization in the future as of December 31, 2025, will be expired from 2039.