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Borrowings - Summary of Long-term Borrowings (Parenthetical) (Detail)
 12 Months Ended
Dec. 31, 2022
Disclosure of detailed information about borrowings [line items]  
Long term debt repayment The above Inter-Korean Cooperation Fund is repayable in installments over 13 years after a seven-year grace period.
Shinhan Bank [member]  
Disclosure of detailed information about borrowings [line items]  
LIBOR rate 4.587%
Woori Bank [Member]  
Disclosure of detailed information about borrowings [line items]  
LIBOR rate 4.04%
NH Jayang [Member]  
Disclosure of detailed information about borrowings [line items]  
LIBOR rate 3.98%
Vessel facility loans [member] | Kookmin Bank [member]  
Disclosure of detailed information about borrowings [line items]  
LIBOR rate 4.767%
Vessel facility loans [member] | Woori Bank [Member]  
Disclosure of detailed information about borrowings [line items]  
LIBOR rate 2.132%