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Related parties (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]      
Net operating revenue $ 736 $ 1,182 $ 1,162
Financial result 161 344 (530)
Cost and operating expenses (964) (1,024) (878)
Discontinued operations [member]      
IfrsStatementLineItems [Line Items]      
Financial result     15
Cost and operating expenses     (95)
Aggregate continuing and discontinued operations [member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 736 1,182 1,162
Financial result 161 344 (515)
Cost and operating expenses (964) (1,024) (973)
Joint ventures where entity is venturer [member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 93 434 640
Financial result   (3) 3
Aliana Gerao De Energia S.a. [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue     5
Cost and operating expenses (126) (121) (105)
Pelletizing Companies [Member]      
IfrsStatementLineItems [Line Items]      
Financial result (38) (34) (15)
Cost and operating expenses (227) (337) (349)
Mrs Logistica SA [member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue   1  
Cost and operating expenses (453) (397) (279)
Norte Energia S.a. [Member]      
IfrsStatementLineItems [Line Items]      
Cost and operating expenses (107) (135) (114)
Other Joint Ventures [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 32 41  
Financial result 1   (1)
Cost and operating expenses (10) (8) (10)
Joint ventures [member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 125 476 645
Financial result (37) (37) (13)
Cost and operating expenses (923) (998) (857)
Vli S.a. [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 321 289 255
Financial result (3) (3) (2)
Cost and operating expenses (29) (26) (21)
Other Associates [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue   1 1
Cost and operating expenses (1)    
Associates [member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 321 290 256
Financial result (3) (3) (2)
Cost and operating expenses (30) (26) (21)
Cosan [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 10    
Cost and operating expenses (11)    
Bradesco [Member]      
IfrsStatementLineItems [Line Items]      
Financial result 201 381 (528)
Banco Do Brasil [Member]      
IfrsStatementLineItems [Line Items]      
Financial result   3 13
Mitsui Co. Ltd [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 280 416 261
Major Stockholders [Member]      
IfrsStatementLineItems [Line Items]      
Net operating revenue 290 416 261
Financial result 201 $ 384 $ (515)
Cost and operating expenses $ (11)