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Financial Instruments by Category - Summary of Financial Instruments by Category (Detail) - KRW (₩)
₩ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items]        
Trade and other payables ₩ 8,397,264 ₩ 7,980,203    
Borrowings 10,006,685 8,437,703    
Other financial liabilities 421,441 497,666    
Lease liabilities 1,172,038 1,159,369    
Cash and cash equivalents 2,449,062 3,019,592 ₩ 2,634,624 ₩ 2,305,894
Trade and other receivables 7,589,118 6,178,816    
Other financial assets 3,823,936 2,008,038    
Loans and receivables [member]        
Disclosure of detailed information about financial instruments [line items]        
Cash and cash equivalents 2,449,062 3,019,592    
Trade and other receivables 7,459,994 5,687,103    
Other financial assets 1,060,058 608,389    
Financial assets at fair value through profit or loss [member]        
Disclosure of detailed information about financial instruments [line items]        
Other financial assets 1,064,856 952,319    
Derivative used for hedge [member]        
Disclosure of detailed information about financial instruments [line items]        
Other financial liabilities 33,555 18,126    
Other financial assets 190,830 99,453    
Financial liabilities designated as at fair value through profit or loss [member]        
Disclosure of detailed information about financial instruments [line items]        
Other financial liabilities 141,280 216,040    
Financial liabilities at amortized cost [member]        
Disclosure of detailed information about financial instruments [line items]        
Trade and other payables 8,397,264 7,980,203    
Borrowings 10,006,685 8,437,703    
Other financial liabilities 246,606 263,500    
Financial assets at fair value through other comprehensive income [member]        
Disclosure of detailed information about financial instruments [line items]        
Trade and other receivables 129,124 491,713    
Other financial assets 1,508,192 347,877    
Others [member]        
Disclosure of detailed information about financial instruments [line items]        
Lease liabilities ₩ 1,172,038 ₩ 1,159,369