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Taxes Payable and Amounts to be Refunded to Customers - Schedule of Taxes and Amounts to be Refunded to Customers (Details) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Taxes Payable and Amounts to be Refunded to Customers    
Beginning Balance R$ 3,304 R$ 3,023
ICMS to be refunded   341
Refund to consumers (1,909) (2,360)
Additional tax credits - Law 14.385/2022   1,419
Financial adjustments - Selic 190 881
Federal Revenue Inspection (67)  
Ending balance R$ 1,518 R$ 3,304