v3.25.1
INVESTMENTS IN SUBSIDIARIES AND ASSOCIATES - Summary of Changes in Non-controlling Interests in Subsidiaries (Detail) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of investments accounted for using equity method [line items]      
Beginning balance R$ 30,025,873 R$ 27,516,232  
Profit attributable to non-controlling interests 1,262,029 3,790,353 R$ 1,644,843
Capital increase (reduction) (634,660) (24,022)  
Sale of assets held for sales (372,030)    
Gain (loss) with capital increase   10,830  
Other comprehensive income (755) (91,736)  
Dividends (2,382,267) (1,550,643)  
Business combination 574,598 237,460  
Reclassification    
Other 21,810 137,399  
Ending balance 28,494,598 30,025,873 27,516,232
Comgas [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 32,145 27,151  
Profit attributable to non-controlling interests 14,726 11,419  
Capital increase (reduction)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income 444  
Dividends (20,680) (6,869)  
Business combination  
Reclassification    
Other 446  
Ending balance 26,637 32,145 27,151
Commit Gás S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 1,562,500 2,058,651  
Profit attributable to non-controlling interests 138,356 185,312  
Capital increase (reduction)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends (456,045) (309,324)  
Business combination 112,401  
Reclassification   (372,030)  
Other 235 (109)  
Ending balance 1,357,447 1,562,500 2,058,651
Norgas S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 372,030  
Profit attributable to non-controlling interests  
Capital increase (reduction)  
Sale of assets held for sales (372,030)    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends  
Business combination  
Reclassification   372,030  
Other  
Ending balance 372,030
Companhia Paranaense de Gás - Compagás [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance    
Profit attributable to non-controlling interests 1,569    
Capital increase (reduction)    
Sale of assets held for sales    
Other comprehensive income    
Dividends (3,446)    
Business combination 462,197    
Other 188    
Ending balance 460,508  
Biometano Verde Paulinia S.A [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 237,981  
Profit attributable to non-controlling interests 1,228 521  
Capital increase (reduction)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends (970)  
Business combination 237,460  
Reclassification    
Other  
Ending balance 238,239 237,981
Compass Gas E Energia S A [Member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 790,672 782,583  
Profit attributable to non-controlling interests 235,988 192,358  
Capital increase (reduction) (179,999)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income (19,254) 132  
Dividends (269,808) (183,126)  
Business combination  
Reclassification    
Other 344 (1,275)  
Ending balance 557,943 790,672 782,583
Rumo S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 11,104,589 10,797,146  
Profit attributable to non-controlling interests (657,631) 503,029  
Capital increase (reduction) (12,250)  
Gain (loss) with capital increase   (9,280)  
Other comprehensive income 904 704  
Dividends (6,676) (122,165)  
Business combination  
Reclassification    
Other 16,266 (52,595)  
Ending balance 10,457,452 11,104,589 10,797,146
Moove Lubricants Holdings [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 695,848    
Profit attributable to non-controlling interests 118,209    
Capital increase (reduction)    
Sale of assets held for sales    
Other comprehensive income 26,028    
Dividends (270,000)    
Business combination    
Other (3,094)    
Ending balance 566,991 695,848  
Cosan Limited Partners Brasil [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 7 9  
Profit attributable to non-controlling interests (2) (2)  
Capital increase (reduction)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends  
Business combination  
Reclassification    
Other  
Ending balance 5 7 9
Cosan Lubes Investments S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 695,848 702,001  
Profit attributable to non-controlling interests   82,979  
Capital increase (reduction)    
Gain (loss) with capital increase    
Other comprehensive income   (78,742)  
Dividends   (15,346)  
Business combination    
Reclassification    
Other   4,956  
Ending balance   695,848 702,001
Cosan Nove Participações S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 2,567,019 2,634,310  
Profit attributable to non-controlling interests (365,149) 338,315  
Capital increase (reduction) 34,202  
Gain (loss) with capital increase   32,732  
Other comprehensive income 25,796 (14,728)  
Dividends (105,000) (436,566)  
Business combination  
Reclassification    
Other 7,577 12,956  
Ending balance 2,164,445 2,567,019 2,634,310
Cosan Dez Participações S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 1,512,041 1,302,661  
Profit attributable to non-controlling interests 501,890 573,987  
Capital increase (reduction) (396,395) 1  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income (34,229) 454  
Dividends (603,022) (372,772)  
Business combination  
Reclassification    
Other (152) 7,710  
Ending balance 980,133 1,512,041 1,302,661
Sinlog Tecnologia em Logística S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 14,911  
Profit attributable to non-controlling interests   (1,969)  
Capital increase (reduction)   21,959  
Gain (loss) with capital increase   (12,622)  
Other comprehensive income    
Dividends    
Business combination    
Reclassification    
Other   (22,279)  
Ending balance   14,911
Janus Brasil Participacoes S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 4,743,201 3,773,279  
Profit attributable to non-controlling interests 513,119 924,908  
Capital increase (reduction)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends (205,270) (74,830)  
Business combination  
Reclassification    
Other 119,844  
Ending balance 5,051,050 4,743,201 3,773,279
Tellus Brasil Participacoes S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 3,156,328 2,584,058  
Profit attributable to non-controlling interests 359,813 562,713  
Capital increase (reduction) (74,741) (18,400)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends (316,542) (40,531)  
Business combination  
Reclassification    
Other 68,488  
Ending balance 3,124,858 3,156,328 2,584,058
Gamiovapar Empreendimentos e Participações S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 472,244 505,681  
Profit attributable to non-controlling interests 128,911 19,233  
Capital increase (reduction) (5,004)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends (9,549) (47,377)  
Business combination  
Reclassification    
Other (289)  
Ending balance 591,606 472,244 505,681
Duguetiapar Empreendimentos e Participações S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 66,715 70,857  
Profit attributable to non-controlling interests 7,911 26,185  
Capital increase (reduction) (17,143)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends (59,821) (30,319)  
Business combination  
Reclassification    
Other (8)  
Ending balance (2,338) 66,715 70,857
Radar II Propriedades Agricolas S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 1,089,154 878,879  
Profit attributable to non-controlling interests 113,818 174,346  
Capital increase (reduction) (584) (1,902)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends (25,518) 37,831  
Business combination  
Reclassification    
Other  
Ending balance 1,176,870 1,089,154 878,879
Radar Propriedades Agricolas S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 204,444 212,065  
Profit attributable to non-controlling interests 67,872 4,331  
Capital increase (reduction) (7,275)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends (16,968) (4,677)  
Business combination  
Reclassification    
Other  
Ending balance 255,348 204,444 212,065
Nova Agrícola Ponte Alta S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 417,013 365,807  
Profit attributable to non-controlling interests 21,574 35,196  
Capital increase (reduction)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends (7,988) 16,010  
Business combination  
Reclassification    
Other  
Ending balance 430,599 417,013 365,807
Nova Amaralina Propriedades Agrícolas S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 29,893 2,041  
Profit attributable to non-controlling interests 12,140 12,971  
Capital increase (reduction)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends (3,035) 14,881  
Business combination  
Reclassification    
Other  
Ending balance 38,998 29,893 2,041
Nova Santa Bárbara Agrícola S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 197,833 201,389  
Profit attributable to non-controlling interests 8,239 (3,141)  
Capital increase (reduction)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends (245) (415)  
Business combination  
Reclassification    
Other  
Ending balance 205,827 197,833 201,389
Terras da Ponte Alta S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 84,251 73,421  
Profit attributable to non-controlling interests (4,238) 14,440  
Capital increase (reduction)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends 10,237 (3,610)  
Business combination  
Reclassification    
Other  
Ending balance 90,250 84,251 73,421
Paineira Propriedades Agrícolas S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 199,303 157,784  
Profit attributable to non-controlling interests 24,339 40,115  
Capital increase (reduction)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends (3,235) 1,404  
Business combination  
Reclassification    
Other  
Ending balance 220,407 199,303 157,784
Manacá Propriedades Agrícolas S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 199,584 160,553  
Profit attributable to non-controlling interests 23,397 40,163  
Capital increase (reduction) (1,151)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends (6,503) 19  
Business combination  
Reclassification    
Other  
Ending balance 216,478 199,584 160,553
Castanheira Propriedades Agrícolas S.A. [member]      
Disclosure of investments accounted for using equity method [line items]      
Beginning balance 291,078 210,995  
Profit attributable to non-controlling interests (4,050) 52,944  
Capital increase (reduction)  
Sale of assets held for sales    
Gain (loss) with capital increase    
Other comprehensive income  
Dividends (2,183) 27,139  
Business combination  
Reclassification    
Other  
Ending balance R$ 284,845 R$ 291,078 R$ 210,995