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Borrowings - Schedule of Borrowings (Details)
₩ in Millions, ¥ in Millions, $ in Millions
Dec. 31, 2025
KRW (₩)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
JPY (¥)
Dec. 31, 2024
KRW (₩)
Dec. 31, 2024
USD ($)
Dec. 31, 2024
JPY (¥)
Disclosure of detailed information about borrowings [line items]            
Borrowings ₩ 10,785,572     ₩ 10,520,690    
Less: Current portion ₩ (2,499,539)     (3,904,752)    
Mar. 25, 2025 | 5Y CMS            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates adjustment rate 3.87% 3.87% 3.87%      
Mar. 25, 2032 | 10Y CMS            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates adjustment rate 3.263% 3.263% 3.263%      
Total amounts            
Disclosure of detailed information about borrowings [line items]            
Borrowings ₩ 10,808,887          
Total amounts | Sep. 07, 2034            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 6.50% 6.50% 6.50%      
Total amounts | Jul. 18, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.50% 2.50% 2.50%      
Total amounts | Sep. 01, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Jan. 21, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 1.375% 1.375% 1.375%      
Total amounts | Aug. 08, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Feb. 02, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 4.125% 4.125% 4.125%      
Total amounts | Mar. 05, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 1.217% 1.217% 1.217%      
Total amounts | Mar. 07, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 1.367% 1.367% 1.367%      
Total amounts | Jan. 03, 2029            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 4.375% 4.375% 4.375%      
Total amounts | Sep. 29, 2028 | Compounded SOFR (3M)            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates adjustment rate 0.66% 0.66% 0.66%      
Total amounts | Dec. 22, 2031            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 4.27% 4.27% 4.27%      
Total amounts | Apr. 10, 2033            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.17% 3.17% 3.17%      
Total amounts | Jun. 26, 2034            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.695% 3.695% 3.695%      
Total amounts | Sep. 02, 2034            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.546% 3.546% 3.546%      
Total amounts | Jan. 29, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Jan. 29, 2035            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.706% 2.706% 2.706%      
Total amounts | Jan. 28, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.203% 2.203% 2.203%      
Total amounts | Jan. 28, 2036            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.351% 2.351% 2.351%      
Total amounts | Jan. 30, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.947% 2.947% 2.947%      
Total amounts | Jan. 30, 2038            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.931% 2.931% 2.931%      
Total amounts | Jan. 15, 2029            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.16% 2.16% 2.16%      
Total amounts | Jan. 14, 2039            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.213% 2.213% 2.213%      
Total amounts | Oct. 11, 2029            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 1.622% 1.622% 1.622%      
Total amounts | Oct. 11, 2039            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 1.674% 1.674% 1.674%      
Total amounts | Jun. 17, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Jun. 17, 2030            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 1.608% 1.608% 1.608%      
Total amounts | Jun. 15, 2040            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 1.713% 1.713% 1.713%      
Total amounts | Jan. 27, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 1.452% 1.452% 1.452%      
Total amounts | Jan. 27, 2031            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 1.849% 1.849% 1.849%      
Total amounts | Jan. 25, 2041            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 1.976% 1.976% 1.976%      
Total amounts | Jun. 10, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 1.806% 1.806% 1.806%      
Total amounts | Jun. 10, 2031            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.168% 2.168% 2.168%      
Total amounts | Jan. 27, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Jan. 27, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.637% 2.637% 2.637%      
Total amounts | Jan. 27, 2032            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.741% 2.741% 2.741%      
Total amounts | Jun. 27, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Jun. 29, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 4.188% 4.188% 4.188%      
Total amounts | Jan. 10, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Jan. 12, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.869% 3.869% 3.869%      
Total amounts | Jan. 12, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.971% 3.971% 3.971%      
Total amounts | Jul. 11, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Jul. 10, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 4.146% 4.146% 4.146%      
Total amounts | Jul. 12, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 4.221% 4.221% 4.221%      
Total amounts | Feb. 27, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.552% 3.552% 3.552%      
Total amounts | Feb. 26, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.608% 3.608% 3.608%      
Total amounts | Feb. 27, 2029            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.548% 3.548% 3.548%      
Total amounts | Dec. 02, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.899% 2.899% 2.899%      
Total amounts | Dec. 02, 2029            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.918% 2.918% 2.918%      
Total amounts | Dec. 02, 2034            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.057% 3.057% 3.057%      
Total amounts | Dec. 02, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.052% 3.052% 3.052%      
Total amounts | Dec. 02, 2029            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.221% 3.221% 3.221%      
Total amounts | Dec. 02, 2034            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.46% 3.46% 3.46%      
Total amounts | Dec. 02, 2034            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.682% 3.682% 3.682%      
Total amounts | Jul. 02, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.224% 2.224% 2.224%      
Total amounts | Jun. 12, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.691% 3.691% 3.691%      
Total amounts | Jun. 12, 2029            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.783% 3.783% 3.783%      
Total amounts | Mar. 10, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 1.756% 1.756% 1.756%      
Total amounts | Aug. 28, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 1.982% 1.982% 1.982%      
Total amounts | Jan. 23, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Feb. 28, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Mar. 25, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Mar. 25, 2032 | 10Y CMS            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates adjustment rate 0.965% 0.965% 0.965%      
Total amounts | Jan. 27, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Aug. 11, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 4.505% 4.505% 4.505%      
Total amounts | Dec. 12, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Jun. 20, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Dec. 22, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Feb. 20, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 4.059% 4.059% 4.059%      
Total amounts | Feb. 22, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 4.311% 4.311% 4.311%      
Total amounts | Apr. 14, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 4.22% 4.22% 4.22%      
Total amounts | May. 09, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Nov. 09, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.932% 3.932% 3.932%      
Total amounts | May. 07, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.972% 3.972% 3.972%      
Total amounts | Apr. 22, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | May. 21, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | May. 22, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Jan. 22, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Feb. 21, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Dec. 22, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Jun. 05, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Aug. 06, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Oct. 02, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Apr. 04, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Jun. 12, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.688% 3.688% 3.688%      
Total amounts | Jun. 11, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.33% 3.33% 3.33%      
Total amounts | Aug. 12, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.329% 3.329% 3.329%      
Total amounts | Mar. 06, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.514% 3.514% 3.514%      
Total amounts | Mar. 09, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.514% 3.514% 3.514%      
Total amounts | Sep. 09, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.474% 3.474% 3.474%      
Total amounts | Sep. 23, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.291% 3.291% 3.291%      
Total amounts | Sep. 24, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.291% 3.291% 3.291%      
Total amounts | Oct. 22, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.292% 3.292% 3.292%      
Total amounts | Nov. 10, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Dec. 10, 2025            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 0.00% 0.00% 0.00%      
Total amounts | Dec. 10, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.101% 3.101% 3.101%      
Total amounts | Dec. 18, 2026            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.134% 3.134% 3.134%      
Total amounts | Jul. 09, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.097% 3.097% 3.097%      
Total amounts | Jul. 12, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.097% 3.097% 3.097%      
Total amounts | Jan. 09, 2029            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.115% 3.115% 3.115%      
Total amounts | Jan. 09, 2030            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.14% 3.14% 3.14%      
Total amounts | Feb. 28, 2029            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.026% 3.026% 3.026%      
Total amounts | Feb. 28, 2030            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.087% 3.087% 3.087%      
Total amounts | Sep. 23, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.013% 3.013% 3.013%      
Total amounts | Sep. 24, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.013% 3.013% 3.013%      
Total amounts | Mar. 24, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.038% 3.038% 3.038%      
Total amounts | Mar. 25, 2030            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.126% 3.126% 3.126%      
Total amounts | Sep. 25, 2030            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.178% 3.178% 3.178%      
Total amounts | Apr. 03, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.989% 2.989% 2.989%      
Total amounts | Apr. 04, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.989% 2.989% 2.989%      
Total amounts | Apr. 04, 2029            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.026% 3.026% 3.026%      
Total amounts | Nov. 22, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.73% 2.73% 2.73%      
Total amounts | May. 22, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.781% 2.781% 2.781%      
Total amounts | May. 22, 2029            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.851% 2.851% 2.851%      
Total amounts | Feb. 11, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.776% 2.776% 2.776%      
Total amounts | Jun. 13, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.822% 2.822% 2.822%      
Total amounts | Aug. 22, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.798% 2.798% 2.798%      
Total amounts | Oct. 20, 2028            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.80% 2.80% 2.80%      
Total amounts | Oct. 19, 2029            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 2.894% 2.894% 2.894%      
Total amounts | Dec. 10, 2027            
Disclosure of detailed information about borrowings [line items]            
Annual interest rates 3.291% 3.291% 3.291%      
Debentures            
Disclosure of detailed information about borrowings [line items]            
Borrowings ₩ 7,043,558     6,056,349    
Less: Current portion (1,653,217)     (3,073,474)    
Discount on bonds (23,314)     (24,177)    
Debentures | Total amounts            
Disclosure of detailed information about borrowings [line items]            
Borrowings 8,720,089     9,154,000    
Debentures | Total amounts | Sep. 07, 2034            
Disclosure of detailed information about borrowings [line items]            
Borrowings 143,490 $ 100,000   147,000 $ 100,000  
Debentures | Total amounts | Jul. 18, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 573,960 400,000   588,000 400,000  
Debentures | Total amounts | Sep. 01, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0 0   588,000 400,000  
Debentures | Total amounts | Jan. 21, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 430,470 300,000   441,000 300,000  
Debentures | Total amounts | Aug. 08, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0 0   735,000 500,000  
Debentures | Total amounts | Feb. 02, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 717,450 500,000   735,000 500,000  
Debentures | Total amounts | Mar. 05, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 213,808   ¥ 23,300,000 0   ¥ 0
Debentures | Total amounts | Mar. 07, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 61,481   ¥ 6,700,000 0   ¥ 0
Debentures | Total amounts | Jan. 03, 2029            
Disclosure of detailed information about borrowings [line items]            
Borrowings 717,450 500,000   0 0  
Debentures | Total amounts | Sep. 29, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 286,980 200,000   0 $ 0  
Debentures | Total amounts | Dec. 22, 2031            
Disclosure of detailed information about borrowings [line items]            
Borrowings 160,000     160,000    
Debentures | Total amounts | Apr. 10, 2033            
Disclosure of detailed information about borrowings [line items]            
Borrowings 100,000     100,000    
Debentures | Total amounts | Jun. 26, 2034            
Disclosure of detailed information about borrowings [line items]            
Borrowings 100,000     100,000    
Debentures | Total amounts | Sep. 02, 2034            
Disclosure of detailed information about borrowings [line items]            
Borrowings 100,000     100,000    
Debentures | Total amounts | Jan. 29, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     240,000    
Debentures | Total amounts | Jan. 29, 2035            
Disclosure of detailed information about borrowings [line items]            
Borrowings 50,000     50,000    
Debentures | Total amounts | Jan. 28, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 100,000     100,000    
Debentures | Total amounts | Jan. 28, 2036            
Disclosure of detailed information about borrowings [line items]            
Borrowings 70,000     70,000    
Debentures | Total amounts | Jan. 30, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 170,000     170,000    
Debentures | Total amounts | Jan. 30, 2038            
Disclosure of detailed information about borrowings [line items]            
Borrowings 70,000     70,000    
Debentures | Total amounts | Jan. 15, 2029            
Disclosure of detailed information about borrowings [line items]            
Borrowings 110,000     110,000    
Debentures | Total amounts | Jan. 14, 2039            
Disclosure of detailed information about borrowings [line items]            
Borrowings 90,000     90,000    
Debentures | Total amounts | Oct. 11, 2029            
Disclosure of detailed information about borrowings [line items]            
Borrowings 50,000     50,000    
Debentures | Total amounts | Oct. 11, 2039            
Disclosure of detailed information about borrowings [line items]            
Borrowings 110,000     110,000    
Debentures | Total amounts | Jun. 17, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     70,000    
Debentures | Total amounts | Jun. 17, 2030            
Disclosure of detailed information about borrowings [line items]            
Borrowings 20,000     20,000    
Debentures | Total amounts | Jun. 15, 2040            
Disclosure of detailed information about borrowings [line items]            
Borrowings 60,000     60,000    
Debentures | Total amounts | Jan. 27, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 140,000     140,000    
Debentures | Total amounts | Jan. 27, 2031            
Disclosure of detailed information about borrowings [line items]            
Borrowings 50,000     50,000    
Debentures | Total amounts | Jan. 25, 2041            
Disclosure of detailed information about borrowings [line items]            
Borrowings 80,000     80,000    
Debentures | Total amounts | Jun. 10, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 80,000     80,000    
Debentures | Total amounts | Jun. 10, 2031            
Disclosure of detailed information about borrowings [line items]            
Borrowings 40,000     40,000    
Debentures | Total amounts | Jan. 27, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     270,000    
Debentures | Total amounts | Jan. 27, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 100,000     100,000    
Debentures | Total amounts | Jan. 27, 2032            
Disclosure of detailed information about borrowings [line items]            
Borrowings 30,000     30,000    
Debentures | Total amounts | Jun. 27, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     280,000    
Debentures | Total amounts | Jun. 29, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 120,000     120,000    
Debentures | Total amounts | Jan. 10, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     70,000    
Debentures | Total amounts | Jan. 12, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 150,000     150,000    
Debentures | Total amounts | Jan. 12, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 80,000     80,000    
Debentures | Total amounts | Jul. 11, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     85,000    
Debentures | Total amounts | Jul. 10, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 160,000     160,000    
Debentures | Total amounts | Jul. 12, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 155,000     155,000    
Debentures | Total amounts | Feb. 27, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 120,000     120,000    
Debentures | Total amounts | Feb. 26, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 200,000     200,000    
Debentures | Total amounts | Feb. 27, 2029            
Disclosure of detailed information about borrowings [line items]            
Borrowings 80,000     80,000    
Debentures | Total amounts | Dec. 02, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 130,000     130,000    
Debentures | Total amounts | Dec. 02, 2029            
Disclosure of detailed information about borrowings [line items]            
Borrowings 70,000     70,000    
Debentures | Total amounts | Dec. 02, 2034            
Disclosure of detailed information about borrowings [line items]            
Borrowings 100,000     100,000    
Debentures | Total amounts | Dec. 02, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 80,000     0    
Debentures | Total amounts | Dec. 02, 2029            
Disclosure of detailed information about borrowings [line items]            
Borrowings 40,000     0    
Debentures | Total amounts | Dec. 02, 2034            
Disclosure of detailed information about borrowings [line items]            
Borrowings 40,000     0    
Debentures | Total amounts | Dec. 02, 2034            
Disclosure of detailed information about borrowings [line items]            
Borrowings 40,000     0    
Debentures | Total amounts | Jul. 02, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 50,000     50,000    
Debentures | Total amounts | Jun. 12, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 50,000     50,000    
Debentures | Total amounts | Jun. 12, 2029            
Disclosure of detailed information about borrowings [line items]            
Borrowings 50,000     50,000    
Debentures | Total amounts | Mar. 10, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 30,000     30,000    
Debentures | Total amounts | Aug. 28, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 20,000     20,000    
Debentures | Total amounts | Jan. 23, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     40,000    
Debentures | Total amounts | Feb. 28, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     20,000    
Debentures | Total amounts | Mar. 25, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     60,000    
Debentures | Total amounts | Mar. 25, 2032            
Disclosure of detailed information about borrowings [line items]            
Borrowings 40,000     40,000    
Debentures | Total amounts | Jan. 27, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     50,000    
Debentures | Total amounts | Aug. 11, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 30,000     30,000    
Debentures | Total amounts | Dec. 12, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     30,000    
Debentures | Total amounts | Jun. 20, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     30,000    
Debentures | Total amounts | Dec. 22, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     10,000    
Debentures | Total amounts | Feb. 20, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 20,000     20,000    
Debentures | Total amounts | Feb. 22, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 80,000     80,000    
Debentures | Total amounts | Apr. 14, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 30,000     30,000    
Debentures | Total amounts | May. 09, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     30,000    
Debentures | Total amounts | Nov. 09, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 10,000     10,000    
Debentures | Total amounts | May. 07, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 30,000     30,000    
Debentures | Total amounts | Apr. 22, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     40,000    
Debentures | Total amounts | May. 21, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     10,000    
Debentures | Total amounts | May. 22, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     40,000    
Debentures | Total amounts | Jan. 22, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     50,000    
Debentures | Total amounts | Feb. 21, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     10,000    
Debentures | Total amounts | Dec. 22, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     10,000    
Debentures | Total amounts | Jun. 05, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     40,000    
Debentures | Total amounts | Aug. 06, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     70,000    
Debentures | Total amounts | Oct. 02, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     40,000    
Debentures | Total amounts | Apr. 04, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     50,000    
Debentures | Total amounts | Jun. 12, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 50,000     50,000    
Debentures | Total amounts | Jun. 11, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 20,000     20,000    
Debentures | Total amounts | Aug. 12, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 60,000     60,000    
Debentures | Total amounts | Mar. 06, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 10,000     10,000    
Debentures | Total amounts | Mar. 09, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 40,000     40,000    
Debentures | Total amounts | Sep. 09, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 30,000     30,000    
Debentures | Total amounts | Sep. 23, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 60,000     60,000    
Debentures | Total amounts | Sep. 24, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 50,000     50,000    
Debentures | Total amounts | Oct. 22, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 40,000     40,000    
Debentures | Total amounts | Nov. 10, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     60,000    
Debentures | Total amounts | Dec. 10, 2025            
Disclosure of detailed information about borrowings [line items]            
Borrowings 0     50,000    
Debentures | Total amounts | Dec. 10, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 50,000     50,000    
Debentures | Total amounts | Dec. 18, 2026            
Disclosure of detailed information about borrowings [line items]            
Borrowings 70,000     70,000    
Debentures | Total amounts | Jul. 09, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 70,000     0    
Debentures | Total amounts | Jul. 12, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 70,000     0    
Debentures | Total amounts | Jan. 09, 2029            
Disclosure of detailed information about borrowings [line items]            
Borrowings 30,000     0    
Debentures | Total amounts | Jan. 09, 2030            
Disclosure of detailed information about borrowings [line items]            
Borrowings 40,000     0    
Debentures | Total amounts | Feb. 28, 2029            
Disclosure of detailed information about borrowings [line items]            
Borrowings 50,000     0    
Debentures | Total amounts | Feb. 28, 2030            
Disclosure of detailed information about borrowings [line items]            
Borrowings 30,000     0    
Debentures | Total amounts | Sep. 23, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 10,000     0    
Debentures | Total amounts | Sep. 24, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 40,000     0    
Debentures | Total amounts | Mar. 24, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 50,000     0    
Debentures | Total amounts | Mar. 25, 2030            
Disclosure of detailed information about borrowings [line items]            
Borrowings 20,000     0    
Debentures | Total amounts | Sep. 25, 2030            
Disclosure of detailed information about borrowings [line items]            
Borrowings 20,000     0    
Debentures | Total amounts | Apr. 03, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 90,000     0    
Debentures | Total amounts | Apr. 04, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 70,000     0    
Debentures | Total amounts | Apr. 04, 2029            
Disclosure of detailed information about borrowings [line items]            
Borrowings 40,000     0    
Debentures | Total amounts | Nov. 22, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings 80,000     0    
Debentures | Total amounts | May. 22, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 100,000     0    
Debentures | Total amounts | May. 22, 2029            
Disclosure of detailed information about borrowings [line items]            
Borrowings 40,000     0    
Debentures | Total amounts | Feb. 11, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 30,000     0    
Debentures | Total amounts | Jun. 13, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 70,000     0    
Debentures | Total amounts | Aug. 22, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 80,000     0    
Debentures | Total amounts | Oct. 20, 2028            
Disclosure of detailed information about borrowings [line items]            
Borrowings 80,000     0    
Debentures | Total amounts | Oct. 19, 2029            
Disclosure of detailed information about borrowings [line items]            
Borrowings 20,000     0    
Debentures | Total amounts | Dec. 10, 2027            
Disclosure of detailed information about borrowings [line items]            
Borrowings ₩ 80,000     ₩ 0    
Debentures | Total amounts | MTNP 2007            
Disclosure of detailed information about borrowings [line items]            
Borrowings | $   100        
Notional amount | $   $ 2,000