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Fair Value - Summary of Fair Value Non of Financial Instruments (Detail) - KRW (₩)
₩ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about financial instruments [line items]    
Non financial assets ₩ 8,263,049 ₩ 6,154,743
Non financial liabilities 9,580,827 8,812,993
Level 1 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 1,032,547 41,613
Level 2 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 750,144 917,726
Non financial liabilities 9,439,547 8,597,661
Level 3 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 6,480,358 5,195,404
Non financial liabilities 141,280 215,332
Financial assets at fair value through other comprehensive income [member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 129,124 491,713
Financial assets at fair value through other comprehensive income [member] | Level 2 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 129,124 491,713
Financial assets at fair value through profit or loss [member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 1,064,856 952,319
Financial assets at fair value through profit or loss [member] | Level 1 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 26,647 24,285
Financial assets at fair value through profit or loss [member] | Level 2 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 426,140 350,949
Financial assets at fair value through profit or loss [member] | Level 3 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 612,069 577,085
Other financial assets at fair value through other comprehensive income [member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 1,508,192 347,877
Other financial assets at fair value through other comprehensive income [member] | Level 1 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 1,005,900 17,328
Other financial assets at fair value through other comprehensive income [member] | Level 2 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 5,163 7,176
Other financial assets at fair value through other comprehensive income [member] | Level 3 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 497,129 323,373
Derivative financial assets for hedging [member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 190,830 99,453
Derivative financial assets for hedging [member] | Level 2 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 189,717 67,888
Derivative financial assets for hedging [member] | Level 3 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 1,113 31,565
Investment Properties [member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 5,370,047 4,263,381
Investment Properties [member] | Level 3 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial assets 5,370,047 4,263,381
Borrowings [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial liabilities 9,405,992 8,578,827
Borrowings [Member] | Level 2 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial liabilities 9,405,992 8,578,827
Other financial liabilities at fair value through profit or loss [member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial liabilities 141,280 216,040
Other financial liabilities at fair value through profit or loss [member] | Level 2 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial liabilities 0 708
Other financial liabilities at fair value through profit or loss [member] | Level 3 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial liabilities 141,280 215,332
Derivative financial liabilities for hedging [member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial liabilities 33,555 18,126
Derivative financial liabilities for hedging [member] | Level 2 [Member]    
Disclosure of detailed information about financial instruments [line items]    
Non financial liabilities ₩ 33,555 ₩ 18,126