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Operations - Operational impacts (Details Textuals)
$ in Millions
 12 Months Ended
Oct. 01, 2022
BRL (R$)
Sep. 12, 2022
BRL (R$)
Aug. 01, 2022
BRL (R$)
Aug. 16, 2021
BRL (R$)
Aug. 16, 2021
USD ($)
Dec. 31, 2022
USD ($)
BRL (R$)
R$ / shares
Brazilian real per US dollar [member]            
Disclosure of operating segments [line items]            
Closing foreign exchange rate (R$ / Per_USD)           5.2177
Oxiteno S. A. Industria e Comercio [member]            
Disclosure of operating segments [line items]            
Final payment to be made in disposal group transaction | $           $ 150
Oxiteno S. A. Industria e Comercio [member] | Discontinued operations [member] | Indorama Ventures PLC            
Disclosure of operating segments [line items]            
Amount to be paid at closing date in disposal group transaction       R$ 5,448,000,000 $ 1,150  
Variations in working capital and net debt position in disposal group transaction       834,000,000 176  
Initial payment made in disposal group transaction       R$ 6,282,000,000 1,326  
Final payment to be made in disposal group transaction | $         $ 150  
Final payment due date       April 2024 April 2024  
Proportion of ownership interest in subsidiary (as a percent)       100.00% 100.00%  
Oxiteno S. A. Industria e Comercio [member] | Discontinued operations [member] | Indorama Ventures PLC | Brazilian real per US dollar [member]            
Disclosure of operating segments [line items]            
Closing foreign exchange rate (R$ / Per_USD) | R$ / shares           4.7372
Extrafarma [member]            
Disclosure of operating segments [line items]            
Borrowings, interest rate basis           DI rate + 0.5% p.a.
Extrafarma [member] | Discontinued operations [member]            
Disclosure of operating segments [line items]            
Aggregate sale price of subsidiary     R$ 700,000,000      
Amount to be paid at closing date in disposal group transaction     737,700,000      
Variations in working capital and net debt position in disposal group transaction     37,700,000      
Initial payment made in disposal group transaction     R$ 372,300,000      
Number of remaining installments     2      
Proportion of ownership interest in subsidiary (as a percent)     100.00%      
Extrafarma [member] | Discontinued operations [member] | Empreendimentos Pague Menos S.A [Member]            
Disclosure of operating segments [line items]            
Initial payment made in disposal group transaction     R$ 365,400,000      
Final payment to be made in disposal group transaction     R$ 182,700,000      
Final payment due date     August 2024      
Borrowings, interest rate basis     DI + 0,5% p.a.      
Extrafarma [member] | Discontinued operations [member] | Shareholders [Member]            
Disclosure of operating segments [line items]            
Initial payment made in disposal group transaction     R$ 6,900,000      
Ultragaz Comercial Ltda [member] | Stella GD Intermediação de Geração Distribuída de Energia Ltda [member]            
Disclosure of operating segments [line items]            
Total minimum acquisition value R$ 63,000,000 R$ 63,000,000        
Consideration in cash R$ 7,560,000 R$ 7,600,000