Financial Instruments - Summary of Carrying Amount of Financial Liabilities Related to Supplier Finance Arrangements (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024
Statements [Line Items]
Amount Received By Suppliers	₩ 625,568
Trade Accounts And Notes Payable [Member]
Statements [Line Items]
Amount Received By Suppliers	617,925
Accounts Payables [Member]
Statements [Line Items]
Amount Received By Suppliers	7,643
Financial liabilities that are part of supplier finance arrangements [member]
Statements [Line Items]
Trade accounts and notes payable	733,651	₩ 1,298,398
Accounts payable	263,327	273,366
Financial liabilities	₩ 996,978	₩ 1,571,764

- Definition

The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Classes of financial instruments [domain]; Financial assets; Derivatives [member]]

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