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Revenue from Contracts with Customers, Other Income and Relevant Contract Assets and Liabilities - Detail Explanation of Operating Revenues And Other Income (Detail) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of disaggregation of revenue from contracts with customers [abstract]      
Mobile services ₩ 7,140,333 ₩ 7,013,889 ₩ 6,936,485
Fixed-line services 5,142,359 5,056,513 4,960,338
Fixed-line and VoIP telephone services 1,249,024 1,378,265 1,465,059
Broadband Internet access services 2,578,558 2,504,833 2,343,591
Data communication services 1,314,777 1,173,415 1,151,689
Media and content 3,206,521 3,099,776 2,800,630
Financial services 3,967,763 3,836,589 3,661,896
Sale of goods 3,292,514 3,393,646 3,532,973
Others 3,845,755 3,833,793 3,313,337
Total ₩ 26,595,245 ₩ 26,234,206 ₩ 25,205,659