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Segment, Geographic and Other Information - Summary of Geographical Areas (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of geographical areas [line items]      
Revenue from external customers ₩ 87,476,410 ₩ 70,546,024 ₩ 60,012,375
Non-current assets [1] 191,206,960 188,431,533 182,333,348
Domestic      
Disclosure of geographical areas [line items]      
Revenue from external customers 86,242,808 69,142,730 58,771,252
Non-current assets [1] 186,384,115 183,707,117 178,760,564
Overseas      
Disclosure of geographical areas [line items]      
Revenue from external customers [2] 1,233,602 1,403,294 1,241,123
Non-current assets [1],[2] ₩ 4,822,845 ₩ 4,724,416 ₩ 3,572,784
[1] The amounts exclude financial assets and deferred tax assets.
[2] Middle East and other Asian countries make up the majority of overseas revenue and non-current assets. Since the overseas revenue or non-current assets attributable to particular countries are not material, they are not disclosed individually.