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Financial Instruments and Risk Management - Additional Information (Details)
$ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 19, 2023
Dec. 05, 2023
Jun. 14, 2023
USD ($)
Apr. 13, 2023
BRL (R$)
Apr. 13, 2023
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2023
BRL (R$)
Dec. 31, 2023
BRL (R$)
Dec. 31, 2022
BRL (R$)
Dec. 31, 2021
BRL (R$)
May 12, 2023
BRL (R$)
Dec. 31, 2020
BRL (R$)
Financial instruments and risk management [line items]                        
Interest on swap settled in cash flow               R$ 99,000,000 R$ 95,000,000      
Percentage of fair value of loans and debentures on CDI rates               123.85%        
Cash flow hedge partially disassembled | $           $ 369            
Gain on cash flow hedge dismantled             R$ 283,000,000          
Hedge dismantled on cash inflow             241,000,000          
Short-term hedge     $ 376 R$ 5,111,000 $ 392              
Maturity of short-term hedge contract Dec. 19, 2023 Dec. 05, 2023                    
Settlement of forward exchange derivative contract               R$ 117,000,000        
Derivative adjustment               177,000,000 438,000,000      
Total current               368,000,000 612,000,000      
Notional amount               445,000,000 996,000,000      
Fair value of financial instrument               497,000,000        
Appreciation to excahange of foreign currencies, amount               R$ 4,980,000        
Average foreign currencies exchange rate               2.86        
Estimated contract credits in arrears receivable               R$ 910,000,000 820,000,000      
Minimum equity required for concession of credit               R$ 800,000,000        
Basel ratio percentage required above minimum set by regulating bank               1.00%        
Percentage of estimated IPCA inflation index               4.23%        
Percentage of estimated IGPM inflation index               3.81%        
Percentage of maximum portfolio limit per bank entity               30.00%        
Percentage of minimum fedreal risk concentrate               50.00%        
Percentage of regulatory agent limits for consumer exposure               100.00%        
Minimum [Member]                        
Financial instruments and risk management [line items]                        
Percentage of fair value of loans and debentures on CDI rates               1.18%        
Percentage of fair value of loans and debentures on IPCA               4.10%        
Percentage of regulatory agent margin distributor supply               95.00%        
Maximum [Member]                        
Financial instruments and risk management [line items]                        
Percentage of fair value of loans and debentures on CDI rates               6.96%        
Percentage of fair value of loans and debentures on IPCA               7.62%        
Percentage of regulatory agent margin distributor supply               105.00%        
Probable Ccenario [Member]                        
Financial instruments and risk management [line items]                        
Financial instrument positive effect on swap and call spread, amount               R$ 129,000,000        
Percentage of estimated IPCA inflation index               4.23%        
Percentage of estimated IGPM inflation index               3.81%        
Swap Contracts [Member]                        
Financial instruments and risk management [line items]                        
Notional amount               R$ 445,000,000 997,000,000      
Put option - SAAG [member]                        
Financial instruments and risk management [line items]                        
Derivative financial liabilities               0 672,000,000 R$ 636,000,000 R$ 780,000,000 R$ 536,000,000
Adjustment to fair value             R$ 25,000,000 R$ 58,000,000 R$ 36,000,000 R$ 100,000,000    
Selic interest rate [Member] | Probable Ccenario [Member]                        
Financial instruments and risk management [line items]                        
Significant interest rate risk               9.25%        
TJLP interest rate [member] | Probable Ccenario [Member]                        
Financial instruments and risk management [line items]                        
Significant interest rate risk               6.27%