v3.26.1
Other Operating Income and Expenses - Details of Other Operating Income and Expenses (Detail) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Other Operating Income:      
Gain on disposal of property and equipment and intangible assets ₩ 127,058 ₩ 37,316 ₩ 21,898
Other operating income 170,434 72,288 50,366
Other Operating Expenses:      
Research and development 339,507 378,079 369,507
Bad debt for accounts receivable – trade 44,183 49,865 37,906
Loss on disposal of property and equipment and intangible assets 15,296 17,427 9,369
Impairment loss on property and equipment and intangible assets 3,140 94,736 10,369
Other operating expenses 2,059,343 1,863,956 1,651,273
Impairment Loss On Assets Held For Sale 12,320 0 0
Parent Company [Member]      
Other Operating Income:      
Gain on disposal of property and equipment and intangible assets 127,058 37,316 21,898
Others 43,376 34,972 28,468
Other operating income 170,434 72,288 50,366
Other Operating Expenses:      
Communication 32,294 34,037 32,238
Utilities 591,507 547,204 511,240
Taxes and dues 68,852 44,888 29,009
Repair 425,698 438,089 431,964
Research and development 339,507 378,079 369,507
Training 29,804 30,949 39,286
Bad debt for accounts receivable – trade 44,183 49,865 37,906
Travel 14,936 19,090 22,499
Supplies and other 317,414 116,920 130,330
Loss on disposal of property and equipment and intangible assets 15,296 17,427 9,369
Impairment loss on property and equipment and intangible assets 3,140 94,736 10,369
Donations 15,339 15,712 14,766
Bad debt for accounts receivable – other 3,282 4,838 5,256
Others 145,771 72,122 7,534
Other operating expenses 2,059,343 1,863,956 1,651,273
Impairment Loss On Assets Held For Sale ₩ 12,320 ₩ 0 ₩ 0