Financial Liabilities (Tables)

12 Months Ended

Dec. 31, 2025

Disclosure of financial liabilities [line items]

Summary of Financial Liabilities

(a)Details of financial liabilities as of December 31, 2024 and 2025 are as follows:

(In millions of won)	December 31, 2024		December 31, 2025
Current
Short-term borrowings	W	969,595		810,718
Current portion of long-term borrowings		4,907,390		2,548,958
Current portion of bonds		611,882		398,223
Derivatives (*)		3,762		4,066
Lease liabilities		34,821		36,429
Total	W	6,527,450		3,798,394
Non-current
Long-term borrowings	W	7,535,290		8,781,368
Bonds		525,957		124,871
Derivatives (*)		7,006		5,487
Lease liabilities		23,154		23,249
Total	W	8,091,407		8,934,975

(*) The derivatives, which are not designated as hedging instruments, arise from cross currency interest rate swap contracts and others for the purpose of managing currency and interest rate risks associated with foreign currency denominated borrowings and bonds.

Bonds issued and outstanding [member]

Disclosure of financial liabilities [line items]

Summary of Debt Instrument

(e)Details of bonds issued and outstanding as of December 31, 2024 and 2025 are as follows:

(In millions of won and USD)	Maturity	Annual interest rate as of December 31, 2025 (%)		December 31, 2024				December 31, 2025
Korean won denominated bonds at amortized cost (*1)
Publicly issued bonds	September 2026 ~ February 2027	2.79~3.66		W		655,000			335,000
Privately issued bonds	January 2026		7.25			337,000			45,000
Less: discount on bonds						(705	)		(257	)
Less: current portion						(611,882	)		(254,872	)
Subtotal				W		379,413			124,871
Foreign currency denominated bonds at amortized cost    (*2)
Privately issued bonds	April 2026		5.76	W		147,000			143,490
Foreign currency equivalent of foreign currency    denominated bonds					USD 100			USD 100
Less: discount on bonds						(456	)		(139	)
Less: foreign currency equivalent of discount on bonds    of foreign currency denominated bonds					USD (0)			USD (0)
Less: current portion						—			(143,351	)
Subtotal				W		146,544			—
Total				W		525,957			124,871

(*1) Principal of the won denominated bonds is to be repaid at maturity and interest is paid quarterly.

(*2) Principal of the foreign currency denominated bonds is to be repaid at maturity and interest is paid quarterly.

Long-term borrowings [Member]

Disclosure of financial liabilities [line items]

Summary of Debt Instrument

(c)Details of Korean won denominated long-term borrowings as of December 31, 2024 and 2025 are as follows:

(In millions of won)
Description	Latest maturity date	Annual interest rate as of December 31, 2025 (%)	December 31, 2024			December 31, 2025
Facility capital and others	January 2026 ~ March 2030	3.46~5.65	W	4,668,538			4,000,423
Less: current portion				(1,861,000	)		(1,190,000	)
			W	2,807,538			2,810,423

12.Financial Liabilities, Continued

(d)Details of foreign currency denominated long-term borrowings as of December 31, 2024 and 2025 are as follows:

(In millions of won, USD and CNY)
Description	Latest maturity date	Annual interest rate as of December 31, 2025 (%)	December 31, 2024				December 31, 2025
Facility capital and others	January 2026 ~ July 2029	2.03~6.27	W		7,774,142			7,329,903
Foreign currency equivalent of foreign currency borrowings				USD 2,528 CNY 20,164			USD 2,350 CNY 19,332
Less: current portion					(3,046,390	)		(1,358,958	)
			W		4,727,752			5,970,945

Short-term borrowings [member]

Disclosure of financial liabilities [line items]

Summary of Debt Instrument

(b)Details of short-term borrowings as of December 31, 2024 and 2025 are as follows:

(In millions of won)
Description	Annual interest rate as of December 31, 2025 (%)	December 31, 2024		December 31, 2025
Working capital and others	3.60~5.72	W	969,595		810,718