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Commitments - Contracts (Detail)
 12 Months Ended
Dec. 31, 2024
Cargo contract one [member]  
Summary of contract commitments [line items]  
Port Aratu [1]
Minimum movement in tons per years 900,000
Maturity 2022
Cargo contract two [member]  
Summary of contract commitments [line items]  
Port Suape
Minimum movement in tons per years 250,000
Maturity 2027
Cargo contract three [member]  
Summary of contract commitments [line items]  
Port Suape
Minimum movement in tons per years 400,000
Maturity 2029
Cargo contract four [member]  
Summary of contract commitments [line items]  
Port Aratu
Minimum movement in tons per years 465,403
Maturity 2031
Cargo contract five [member]  
Summary of contract commitments [line items]  
Port Itaqui
Minimum movement in tons per years 1,468,105
Maturity 2049
Cargo contract Six [member]  
Summary of contract commitments [line items]  
Port Vila do Conde
Minimum movement in tons per years 343,625
Maturity 2044
[1] Contract in the process of being renewed with the appropriate body, being judicialized by favorable decision, until the public entity completes the analysis so that the new amendment is signed. In a decision of the Ministry of Infrastructure, the investment plans presented by Ultracargo were preliminarily approved, and the Waterway Transport Regulatory Agency (ANTAQ) approved the technical, economic and environmental feasibility study of this extension project.