v3.26.1
PROVISIONS - Schedule of Changes in Provisions (Details) - BRL (R$)
R$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Disclosure of other provisions [line items]    
Provisions, beginning balance R$ 1,774,675  
Movements 288,274  
Modifications 21,624  
Write-offs (312,967)  
Interest incurred 119,956  
Foreign currency exchange (89,258)  
Provisions, ending balance R$ 1,802,304 R$ 1,774,675
Nominal discount rate 17.90% 17.90%
Return of aircraft and engines    
Disclosure of other provisions [line items]    
Provisions, beginning balance R$ 1,507,285  
Movements 48,946  
Modifications 21,624  
Write-offs (111,746)  
Interest incurred 116,285  
Foreign currency exchange (89,258)  
Provisions, ending balance 1,493,136 R$ 1,507,285
Tax, civil and labor risks(b)    
Disclosure of other provisions [line items]    
Provisions, beginning balance 257,176  
Movements 239,251  
Modifications 0  
Write-offs (201,221)  
Interest incurred 3,201  
Foreign currency exchange 0  
Provisions, ending balance 298,407 257,176
Post-employment benefit    
Disclosure of other provisions [line items]    
Provisions, beginning balance 10,214  
Movements 77  
Modifications 0  
Write-offs 0  
Interest incurred 470  
Foreign currency exchange 0  
Provisions, ending balance R$ 10,761 R$ 10,214