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Provisions - Summary of Changes in Provisions (Detail) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of other provisions [line items]    
Beginning balance ₩ 257,397 ₩ 252,192
Increase (Transfer) 24,879 32,895
Usage (30,081) (7,301)
Reversal (51,789) (22,897)
Scope change   2,314
Others (40) 194
Ending balance 200,366 257,397
Current 109,133 171,316
Non-current 91,233 86,081
Litigation [member]    
Disclosure of other provisions [line items]    
Beginning balance 80,165 76,500
Increase (Transfer) 6,005 6,288
Usage (6,155) (2,599)
Reversal (43,686) (24)
Ending balance 36,329 80,165
Current 34,730 79,947
Non-current 1,599 218
Restoration cost [member]    
Disclosure of other provisions [line items]    
Beginning balance 107,358 105,767
Increase (Transfer) 13,027 6,772
Usage (8,143) (2,776)
Reversal (3,685) (3,685)
Scope change   1,086
Others 405 194
Ending balance 108,962 107,358
Current 19,918 26,026
Non-current 89,044 81,332
Others [member]    
Disclosure of other provisions [line items]    
Beginning balance 69,874 69,925
Increase (Transfer) 5,847 19,835
Usage (15,783) (1,926)
Reversal (4,418) (19,188)
Scope change   1,228
Others (445)  
Ending balance 55,075 69,874
Current 54,485 65,343
Non-current ₩ 590 ₩ 4,531