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Risk Management - Summary of Fair Value Measurement of Financial Liabilities (Details) - KRW (₩) ₩ in Millions		Dec. 31, 2024	Dec. 31, 2023
Disclosure of financial liabilities [line items]
Financial liabilities		₩ 146,838,781	₩ 148,155,994
At fair value
Disclosure of financial liabilities [line items]
Financial liabilities		284,825	452,234
Financial liabilities, at fair value		284,825	452,234
At amortized cost
Disclosure of financial liabilities [line items]
Financial liabilities		146,553,956	147,703,760
Financial liabilities, at fair value		145,433,258	145,129,539
Derivative liabilities | Not Designated as Hedging Instrument | At fair value
Disclosure of financial liabilities [line items]
Financial liabilities		279,932	428,670
Financial liabilities, at fair value		279,932	428,670
Derivative liabilities | Designated as Hedging Instrument | At fair value
Disclosure of financial liabilities [line items]
Financial liabilities		4,893	23,564
Financial liabilities, at fair value		4,893	23,564
Secured borrowings | At amortized cost
Disclosure of financial liabilities [line items]
Financial liabilities		1,443,125	773,646
Financial liabilities, at fair value		1,443,125	773,646
Unsecured bond | At amortized cost
Disclosure of financial liabilities [line items]
Financial liabilities		111,874,019	113,792,178
Financial liabilities, at fair value		110,798,858	111,218,771
Lease liabilities | At amortized cost
Disclosure of financial liabilities [line items]
Financial liabilities		3,699,456	3,807,880
Financial liabilities, at fair value		3,699,456	3,807,880
Unsecured borrowings | At amortized cost
Disclosure of financial liabilities [line items]
Financial liabilities		19,040,213	19,062,162
Financial liabilities, at fair value		18,994,676	19,061,348
Trade and other payables | At amortized cost
Disclosure of financial liabilities [line items]
Financial liabilities	[1]	10,321,100	10,264,050
Financial liabilities, at fair value	[1]	10,321,100	10,264,050
Bank overdraft | At amortized cost
Disclosure of financial liabilities [line items]
Financial liabilities		176,043	3,844
Financial liabilities, at fair value		₩ 176,043	₩ 3,844
[1] Excludes lease liabilities.

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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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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The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities]

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