v3.25.1
SUBSEQUENT EVENTS - Additional Information (Detail)
R$ / shares in Units, shares in Thousands, R$ in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 14, 2025
USD ($)
Feb. 19, 2025
R$ / shares
Feb. 18, 2025
BRL (R$)
Feb. 13, 2025
BRL (R$)
Feb. 13, 2025
USD ($)
Feb. 12, 2025
BRL (R$)
Feb. 12, 2025
USD ($)
Jan. 26, 2025
BRL (R$)
shares
Jan. 10, 2025
BRL (R$)
Mar. 31, 2025
BRL (R$)
Dec. 31, 2024
BRL (R$)
R$ / shares
Dec. 31, 2023
BRL (R$)
R$ / shares
Dec. 31, 2022
BRL (R$)
Mar. 12, 2025
BRL (R$)
Jan. 28, 2025
BRL (R$)
May 29, 2024
BRL (R$)
Jan. 26, 2024
Subsequent events                                  
Dividends paid                         R$ 1,237,779        
Dividend per share | R$ / shares                     R$ 1.58 R$ 1.27          
Dividends payable, non-cash assets distributions                     R$ 96,722 R$ 549,054 892,006        
Dividends received                     1,312,706 1,161,439          
Approval amount of increase in share capital                               R$ 150,000  
Amount of shares authorized                     9,000,000            
Gain (loss) on hedge ineffectiveness recognised in profit or loss [1]                     822,687            
Tax credits                     R$ 60,282 R$ 43,835 R$ 114,812        
Repurchase Of Debt Securities                   R$ 1,152,469              
Prize On Repurchase Of Debt Securities                   R$ 1,152,469              
Rumo S.A. [member]                                  
Subsequent events                                  
Proportion of ownership interests held by non-controlling interests                     69.60%            
Cosan Nove Participações S.A. [member]                                  
Subsequent events                                  
Proportion of ownership interests held by non-controlling interests                     26.91%            
Debentures issued | Cosan Luxembourg S A [member]                                  
Subsequent events                                  
Aggregate principal amount                           R$ 2,500,000      
Debentures issued | Compagas [member] | Debentures 5th issue - single series [member]                                  
Subsequent events                                  
Aggregate principal amount                 R$ 410,000                
Interest, Index                 average daily DI rates plus a spread of 0.50% p.a.                
Maturity                 January 7, 2027                
Debentures issued | TRSP [member] | Debentures Second Issue [Member]                                  
Subsequent events                                  
Aggregate principal amount     R$ 800,000                            
Interest, Index     IPCA + 7.4367% p.a.                            
Maturity     January 15, 2030 and January 15, 2033                            
Dividend receivable [member] | Vale SA [Member]                                  
Subsequent events                                  
Dividend per share | R$ / shares   R$ 2.141847479                              
Other disposals of assets [member] | Vale SA [Member]                                  
Subsequent events                                  
Percentage of share capital owned                                 0.10%
Percentage Of Share Capital Disposed               4.05%                  
Number Of Share Disposed In Investment | shares               173,073,795                  
Proceeds from sales of interests in associates               R$ 9,050,029                  
Number of shares owned | shares               4,268,720                  
Announcing or commencing implementation of major restructuring [member] | Rumo S.A. [member] | Rumo Malha Norte SA [member]                                  
Subsequent events                                  
Proportion of ownership interests held by non-controlling interests   0.26%                              
Debt Repurchase Member                                  
Subsequent events                                  
Repurchase Of Debt Securities           R$ 3,462,660 $ 600,000                    
Debt Repurchase Member | Senior Notes Due 2027 [Member]                                  
Subsequent events                                  
Repurchase Of Debt Securities | $ $ 392,000                                
Debt Repurchase Member | Cosan Luxembourg S A [member] | Senior Notes Due 2031 [Member]                                  
Subsequent events                                  
Interest Rate                   7.25%              
Repurchase Of Debt Securities                   R$ 1,594,064              
Prize On Repurchase Of Debt Securities                   R$ 1,544,299              
Rectification Of Dividends [Member] | Cosan Nove Participações S.A. [member]                                  
Subsequent events                                  
Preferred share issue (in shares)                             R$ 331,000    
Rectification Of Dividends [Member] | Cosan Nove Participações S.A. [member] | Bottom of range [member]                                  
Subsequent events                                  
Dividends payable, non-cash assets distributions           40,000                      
Rectification Of Dividends [Member] | Cosan Nove Participações S.A. [member] | Top of range [member]                                  
Subsequent events                                  
Dividends payable, non-cash assets distributions           R$ 371,000                      
Early Redemption Of Debentures Member                                  
Subsequent events                                  
Repurchase Of Debt Securities       R$ 1,733,640 $ 300,000                        
[1] The gain mentioned in this settlement was recognized in the financial results for the year.