v3.26.1
LEASES - Schedule of Roll forward of Lease Liabilities (Details) - BRL (R$)
R$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Disclosure of reconciliation of liabilities arising from financing activities [line items]          
Balances at the beginning of the period     R$ 12,711,063    
Interest incurred R$ 432,035 R$ 710,980 890,507 R$ 1,384,340  
Balances at the end of the period 11,531,853   11,531,853    
Current 2,591,184   2,591,184   R$ 3,353,501
Non-current 8,940,669   8,940,669   9,357,562
Leases          
Disclosure of reconciliation of liabilities arising from financing activities [line items]          
Balances at the beginning of the period     12,532,206    
Additions     1,137,880    
Modifications     (173,701)    
Payments     (1,532,109)    
Interest incurred     886,813    
Write-offs     (587,995)    
Foreign currency exchange     (731,241)    
Balances at the end of the period 11,531,853   11,531,853    
Current 2,591,184   2,591,184   3,353,501
Non-current 8,940,669   R$ 8,940,669   R$ 9,178,705
Leases | Aircraft, engines and simulators          
Disclosure of reconciliation of liabilities arising from financing activities [line items]          
Average remaining term     8 years 1 month 6 days    
Weighted average rate p.a.         17.30%
Balances at the beginning of the period     R$ 11,604,971    
Additions     972,291    
Modifications     (36,479)    
Payments     (1,426,315)    
Interest incurred     843,986    
Write-offs     (365,553)    
Foreign currency exchange     (672,849)    
Balances at the end of the period 10,920,052   R$ 10,920,052    
Leases | Others          
Disclosure of reconciliation of liabilities arising from financing activities [line items]          
Average remaining term     5 years 2 months 12 days    
Weighted average rate p.a.         16.30%
Balances at the beginning of the period     R$ 219,673    
Additions     30,951    
Modifications     756    
Payments     (56,208)    
Interest incurred     19,517    
Write-offs     (3,519)    
Foreign currency exchange     (21,275)    
Balances at the end of the period 189,895   R$ 189,895    
Leases | Aircraft, engines and simulators          
Disclosure of reconciliation of liabilities arising from financing activities [line items]          
Average remaining term     6 years 9 months 18 days    
Weighted average rate p.a.         12.00%
Balances at the beginning of the period     R$ 707,562    
Additions     134,638    
Modifications     (137,978)    
Payments     (49,586)    
Interest incurred     23,310    
Write-offs     (218,923)    
Foreign currency exchange     (37,117)    
Balances at the end of the period 421,906   421,906    
Leases – Notes          
Disclosure of reconciliation of liabilities arising from financing activities [line items]          
Balances at the beginning of the period     178,857    
Interest incurred     3,694    
Write-offs     (172,742)    
Foreign currency exchange     (9,809)    
Balances at the end of the period 0   0    
Current 0   0   R$ 0
Non-current R$ 0   R$ 0   R$ 178,857
Leases – Notes | Lessors          
Disclosure of reconciliation of liabilities arising from financing activities [line items]          
Weighted average rate p.a. 0.00%   0.00%    
Balances at the beginning of the period     R$ 178,857    
Interest incurred     3,694    
Write-offs     (172,742)    
Foreign currency exchange     (9,809)    
Balances at the end of the period R$ 0   R$ 0