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Segment, Geographic and Other Information - Summary of Geographical Areas (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of geographical areas [line items] |  |  |  |
Revenue from external customers |  | ₩ 92,578,265 | ₩ 87,476,410 | ₩ 70,546,024
Non-current assets | [1] | 195,972,142 | 191,206,960 | 188,431,533
Domestic |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Revenue from external customers |  | 91,286,837 | 86,242,808 | 69,142,730
Non-current assets | [1] | 191,214,679 | 186,384,115 | 183,707,117
Overseas |  |  |  |
Disclosure of geographical areas [line items] |  |  |  |
Revenue from external customers | [2] | 1,291,428 | 1,233,602 | 1,403,294
Non-current assets | [1],[2] | ₩ 4,757,463 | ₩ 4,822,845 | ₩ 4,724,416
[1] | The amounts exclude financial assets, deferred tax assets, and net defined benefit 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.

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