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Employment Benefits - Summary of Expense Relating to Defined Benefit Plans by Nature (Details) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disclosure of defined benefit plans [line items]
Defined benefit	₩ 473,369	₩ 400,985	₩ 539,619
Cost of sales [member]
Disclosure of defined benefit plans [line items]
Defined benefit	340,165	285,209	404,243
Selling, general and administrative expense [member]
Disclosure of defined benefit plans [line items]
Defined benefit	87,815	73,521	81,457
Others (Construction-in-progress and others) [member]
Disclosure of defined benefit plans [line items]
Defined benefit	₩ 45,389	₩ 42,255	₩ 53,919

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- Definition

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.

+ References

No definition available.

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- Definition

The amount of post-employment benefit expense included in profit or loss relating to defined benefit plans. [Refer: Profit (loss); Defined benefit plans [domain]] [Contrast: Increase (decrease) in net defined benefit liability (asset) resulting from expense (income) in profit or loss]

+ References

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