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Financial Risk Management - Summary of Contractual Undiscounted Cash Flows (Detail) - KRW (₩)
₩ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Trade and other payables ₩ 8,483,110 ₩ 8,090,898
Borrowings(including debentures) 11,016,756 9,838,571
Lease liabilities 1,336,761 1,300,562
Other non-derivative financial liabilities 336,178 309,122
Financial guarantee contracts 26,206 71,697
Total 21,199,011 19,610,850
Less than 1 year [member]    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Trade and other payables 7,386,703 6,698,783
Borrowings(including debentures) 2,028,207 1,927,456
Lease liabilities 313,162 388,226
Other non-derivative financial liabilities 33,279 1,473
Financial guarantee contracts 21,618 71,697
Total 9,782,969 9,087,635
1-5 years [member]    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Trade and other payables 1,009,559 1,232,468
Borrowings(including debentures) 6,972,077 5,635,558
Lease liabilities 615,766 484,476
Other non-derivative financial liabilities 209,155 206,749
Financial guarantee contracts
Total 8,806,557 7,559,251
More than 5 years [member]    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Trade and other payables 86,848 159,647
Borrowings(including debentures) 2,016,472 2,275,557
Lease liabilities 407,833 427,860
Other non-derivative financial liabilities 93,744 100,900
Financial guarantee contracts 4,588
Total ₩ 2,609,485 ₩ 2,963,964