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Borrowings - Summary of Long-term Borrowings (Parenthetical) (Detail)
 12 Months Ended
Dec. 31, 2023
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.
Vessel facility loans [member] | Shinhan Bank [member]  
Disclosure of detailed information about borrowings [line items]  
LIBOR rate 5.331%
Vessel facility loans [member] | Woori Bank [Member]  
Disclosure of detailed information about borrowings [line items]  
LIBOR rate 3.909%
Vessel facility loans [member] | NH Jayang [Member]  
Disclosure of detailed information about borrowings [line items]  
LIBOR rate 3.82%