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Segment Information - Summary Revenue from External Customers by Country (Details) - KRW (₩)
₩ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of geographical areas [line items]      
Revenue ₩ 725,516 ₩ 463,618 ₩ 413,938
Korea      
Disclosure of geographical areas [line items]      
Revenue 86,058 46,719 73,751
Taiwan      
Disclosure of geographical areas [line items]      
Revenue 176,071 175,664 77,462
Japan      
Disclosure of geographical areas [line items]      
Revenue 18,999 26,133 40,259
The United States of America      
Disclosure of geographical areas [line items]      
Revenue 22,702 33,697 20,894
Thailand      
Disclosure of geographical areas [line items]      
Revenue 136,874 75,498 94,475
The Philippines      
Disclosure of geographical areas [line items]      
Revenue 102,595 26,003 20,173
Indonesia      
Disclosure of geographical areas [line items]      
Revenue 58,763 5,472 10,723
Hong Kong      
Disclosure of geographical areas [line items]      
Revenue 22,656 24,397 7,648
Malaysia      
Disclosure of geographical areas [line items]      
Revenue 58,553 24,830 30,422
Others      
Disclosure of geographical areas [line items]      
Revenue ₩ 42,245 ₩ 25,205 ₩ 38,131