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Contingencies and Commitments - Summary of Credit Lines Provided By Financial Institutions (Details) - 12 months ended Dec. 31, 2022
₱ in Thousands, € in Thousands, ₨ in Thousands, ر.س in Thousands, د.إ in Thousands, ¥ in Thousands, $ in Thousands, $ in Thousands, ₩ in Millions
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Commitments on Bank-overdraft                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Nonghyup Bank and others                
Credit limit | ₩ ₩ 1,910,500                
Used amount | ₩ ₩ 53,416                
Limit amount available for CP                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Hana Bank and others                
Credit limit | ₩ ₩ 3,250,000                
Used amount | ₩ ₩ 3,250,000                
General loan, etc.                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Hana Bank and others                
Credit limit | ₩ ₩ 3,000,000                
Used amount | ₩ ₩ 3,000,000                
Limit amount available for card                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Hana Bank and others                
Credit limit | ₩ ₩ 47,424                
Used amount | ₩ ₩ 2,615                
Limit amount available for card                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Banco de Oro                
Credit limit | ₱   ₱ 5,000              
Used amount | ₱   ₱ 3,000              
Loan limit                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Korea Development Bank and others                
Credit limit | ₩ ₩ 2,023,728                
Used amount | ₩ ₩ 1,369,694                
Loan limit                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions DBS Bank Ltd and others                
Credit limit     $ 1,385,000            
Used amount     143,841            
Certification of payment on payables from foreign country                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Nonghyup Bank                
Credit limit     12,028            
Used amount     8,040            
Certification of payment on L/C                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Credit Agricole and others                
Credit limit     1,317,245            
Used amount     402,677            
Certification of payment on L/C                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Kookmin Bank and others                
Credit limit | €       € 48,122          
Used amount | €       31,472          
Certification of payment on L/C                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Shinhan Bank                
Credit limit | ¥         ¥ 481,785        
Used amount | ¥         0        
Certification of performance guarantee on contracts                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Hana Bank and others                
Credit limit | ₩ ₩ 127,606                
Used amount | ₩ ₩ 106,020                
Certification of performance guarantee on contracts                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions First Abu Dhabi Bank and others                
Credit limit     1,092,590            
Used amount     788,404            
Certification of performance guarantee on contracts                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Korea Development Bank and others                
Credit limit | ¥         620,000        
Used amount | ¥         ¥ 620,000        
Certification of performance guarantee on contracts                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Hana Bank and others                
Credit limit | €       3,965          
Used amount | €       3,965          
Certification of performance guarantee on contracts                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Shinhan Bank                
Credit limit | ₨           ₨ 44,872      
Used amount | ₨           0      
Certification of performance guarantee on contracts                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Hana Bank                
Credit limit | ر.س             ر.س 1,509    
Used amount | ر.س             1,509    
Certification of bidding                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Hana Bank                
Credit limit     5,200            
Used amount     0            
Advance payment bond, Warranty bond, Retention bond and others                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Export-Import Bank of Korea                
Credit limit | €       10,000          
Used amount | €       € 10,000          
Advance payment bond, Warranty bond, Retention bond and others                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Export-Import Bank of Korea                
Credit limit | ₩ ₩ 106,776                
Used amount | ₩ ₩ 75,900                
Advance payment bond, Warranty bond, Retention bond and others                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Hana Bank and others                
Credit limit     306,251            
Used amount     282,224            
Advance payment bond, Warranty bond, Retention bond and others                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Hana Bank and others                
Credit limit               $ 21,597  
Used amount               $ 20,027  
Other commitments                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Nonghyup Bank and others                
Credit limit | ₩ ₩ 1,216,250                
Used amount | ₩ ₩ 300,936                
Other commitments                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Export-Import Bank of Korea and others                
Credit limit     733,318            
Used amount     510,094            
Other commitments                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Standard Chartered                
Credit limit | د.إ                 د.إ 50
Used amount | د.إ                 د.إ 50
Other commitments                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Shinhan Bank                
Credit limit | ر.س             3,000    
Used amount | ر.س             ر.س 3,000    
Inclusive credit                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Hana Bank                
Credit limit | ₩ ₩ 8,000                
Used amount | ₩ ₩ 667                
Equity Bridge Loan Guarantee                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Kookmin Bank                
Credit limit     135,000            
Used amount     45,909            
Equity Bridge Loan Guarantee                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Hana Bank                
Credit limit | ₨           0      
Used amount | ₨           ₨ 323,837      
Equity Bridge Loan Guarantee                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Mizuho Bank and others                
Credit limit     1,685,955            
Used amount     1,141,788            
Trade finance                  
Commitments and Contingencies Disclosure [Line Items]                  
Financial institutions Export-Import Bank of Korea and others                
Credit limit     970,000            
Used amount     $ 0