v3.25.1
FINANCIAL ASSETS AND LIABILITIES - Schedule of estimated realization in shareholders' equity (Detail) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure Of Foreign Currency Related Hedging Instruments And Interest Rate Swaps [Line Items]      
Book value R$ 3,799,328 R$ 2,546,799  
Comprehensive income (393,651) R$ (125,233) R$ 723
Gains or (losses) realized [1] R$ 822,687    
Leasing [member]      
Disclosure Of Foreign Currency Related Hedging Instruments And Interest Rate Swaps [Line Items]      
Period for exchange rate effects of highly probable revenues projection 20 years    
Cash flow hedges [member] | Rumo S.A. [member]      
Disclosure Of Foreign Currency Related Hedging Instruments And Interest Rate Swaps [Line Items]      
Notional R$ (1,783,341)    
Fair value 446,224    
Book value 446,224    
Deferred taxes (151,716)    
Effect on shareholders' equity 294,508    
Net operating revenue (12,086)    
Net financial result (18,366)    
Comprehensive income 446,224    
Gains or (losses) realized 23,029    
Cash flow hedges [member] | Rumo S.A. [member] | Leasing [member]      
Disclosure Of Foreign Currency Related Hedging Instruments And Interest Rate Swaps [Line Items]      
Notional (1,783,341)    
Fair value 446,224    
Book value 446,224    
Deferred taxes (151,716)    
Effect on shareholders' equity 294,508    
Net operating revenue (6,937)    
Net financial result (486)    
Comprehensive income 446,224    
Gains or (losses) realized    
Cash flow hedges [member] | Rumo S.A. [member] | Derivative futures (BRENT)      
Disclosure Of Foreign Currency Related Hedging Instruments And Interest Rate Swaps [Line Items]      
Net operating revenue (5,149)    
Net financial result (17,880)    
Comprehensive income    
Gains or (losses) realized R$ 23,029    
[1] The gain mentioned in this settlement was recognized in the financial results for the year.