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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, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Revenue |  |  |  |
Total revenue from external customers (Notes 2,4, 35, 45, 47) |  | ₩ 70,546,024 | ₩ 60,012,375 | ₩ 57,926,634
Non-current assets | [1] | 188,431,533 | 182,333,348 | 176,505,403
Domestic |  |  |  |
Revenue |  |  |  |
Total revenue from external customers (Notes 2,4, 35, 45, 47) |  | 69,142,730 | 58,771,252 | 56,775,375
Non-current assets | [1] | 183,707,117 | 178,760,564 | 173,673,478
Overseas |  |  |  |
Revenue |  |  |  |
Total revenue from external customers (Notes 2,4, 35, 45, 47) | [2] | 1,403,294 | 1,241,123 | 1,151,259
Non-current assets | [1],[2] | ₩ 4,724,416 | ₩ 3,572,784 | ₩ 2,831,925
[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.

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