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Intangible Assets - Summary of Changes in Intangible Assets (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about intangible assets [line items]      
Beginning balance ₩ 3,363 ₩ 1,717 ₩ 1,163
Acquisitions/Capital expenditure 2,016 2,896 1,514
Amortization (1,748) (1,137) (905)
Disposals (15) 0 (20)
Impairment (281) (115) (52)
Foreign exchange differences 7 2 17
Ending balance 3,342 3,363 1,717
Software      
Disclosure of detailed information about intangible assets [line items]      
Beginning balance 2,234 1,144 991
Acquisitions/Capital expenditure 116 1,986 951
Amortization (1,088) (897) (807)
Disposals (15) 0 (8)
Impairment 0 0 0
Foreign exchange differences 17 1 17
Ending balance 1,264 2,234 1,144
Industrial property rights      
Disclosure of detailed information about intangible assets [line items]      
Beginning balance 332 186 72
Acquisitions/Capital expenditure 224 185 153
Amortization (73) (39) (27)
Disposals 0 0 (12)
Impairment 0 0 0
Foreign exchange differences 0 0 0
Ending balance 483 332 186
License      
Disclosure of detailed information about intangible assets [line items]      
Beginning balance 0 0 57
Acquisitions/Capital expenditure 0 0 0
Amortization 0 0 (5)
Disposals 0 0 0
Impairment 0 0 (52)
Foreign exchange differences 0 0 0
Ending balance 0 0 0
Other intangible assets      
Disclosure of detailed information about intangible assets [line items]      
Beginning balance 797 387 43
Acquisitions/Capital expenditure 1,676 725 410
Amortization (587) (201) (66)
Disposals 0 0 0
Impairment (281) (115) 0
Foreign exchange differences (10) 1 0
Ending balance ₩ 1,595 ₩ 797 ₩ 387