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Loans, financing, debentures and derivative financial instruments - Summary of Debentures (Detail) - BRL (R$)
R$ / shares in Units, R$ in Thousands
12 Months Ended
Dec. 31, 2022
Jun. 30, 2022
Sep. 30, 2021
Debentures first issue [member] | Tequimar Vila do Conde [member]      
Summary of loans debentures and finance leases [line items]      
Interest 111.4% of the DI    
Debentures second issue [member] | Ultracargo Logística S.A.      
Summary of loans debentures and finance leases [line items]      
Interest 111.4% of the DI    
Debentures tenth issue [member] | IPP [member]      
Summary of loans debentures and finance leases [line items]      
Interest IPCA to 102.75% of DI    
Debentures eleventh issue [member] | IPP [member]      
Summary of loans debentures and finance leases [line items]      
Interest IPCA to 104.8% of DI    
Debenture eleven [member] | Debentures eleventh issue [member] | IPP [member]      
Summary of loans debentures and finance leases [line items]      
Amount: R$ 1,000,000 R$ 1,000,000  
Face value unit R$ 1,000    
Final maturity June 11, 2032    
Payment of the face value Annual from the 8th year    
Interest IPCA + 6.0053%    
Payment of interest Semiannually    
Reprice Not applicable    
Debenture twelve [member] | Debentures first issue [member] | Tequimar Vila do Conde [member]      
Summary of loans debentures and finance leases [line items]      
Face value unit R$ 1,000    
Final maturity March 15, 2028    
Payment of the face value Lump sum at final maturity    
Interest IPCA + 4.04%    
Payment of interest Semiannually    
Reprice Not applicable    
Debenture twelve [member] | Debentures second issue [member] | Ultracargo Logística S.A.      
Summary of loans debentures and finance leases [line items]      
Face value unit R$ 1,000    
Final maturity March 15, 2028    
Payment of the face value Lump sum at final maturity    
Interest IPCA + 4.37%    
Payment of interest Semiannually    
Reprice Not applicable    
Debenture thirteen [member] | Debentures tenth issue [member] | IPP [member]      
Summary of loans debentures and finance leases [line items]      
Amount: R$ 960,000   R$ 960,000
Face value unit R$ 1,000    
Final maturity September 15, 2028    
Payment of the face value Lump sum at final maturity    
Interest IPCA + 4.8287%    
Payment of interest Semiannually    
Reprice Not applicable