v3.26.1
LEASES - Schedule of Roll forward of Lease Liabilities (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Balances at the beginning of the period R$ 21,378,847    
Interest incurred 2,675,913 R$ 2,460,514 R$ 2,420,557
Balances at the end of the period 12,711,063 21,378,847  
Current 3,353,501 6,314,221  
Non-current 9,357,562 15,064,626  
Leases      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Balances at the beginning of the period 17,338,698 12,455,827  
Additions 1,725,558 2,669,753  
Modifications 73,331 231,459  
Payments (3,790,287) (3,226,647)  
Interest incurred 2,462,958 2,004,159  
Transfers (155,586) (226,490)  
Write-offs (220,677) (30,858)  
Foreign currency exchange (2,005,500) 3,461,495  
GUC (2,896,289)    
Balances at the end of the period 12,532,206 17,338,698 12,455,827
Current 3,353,501 4,928,197 3,349,056
Non-current R$ 9,178,705 R$ 12,410,501 9,106,771
Leases | Lease without purchase option: Aircraft and engines      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Average remaining term 8 years 1 month 6 days 8 years  
Weighted average rate p.a 18.60% 16.20%  
Balances at the beginning of the period R$ 16,357,918 R$ 11,567,882  
Additions 1,586,734 2,605,615  
Modifications 13,279 237,065  
Payments (3,552,045) (2,955,177)  
Interest incurred 2,351,625 1,890,622  
Transfers (155,586) (226,490)  
Write-offs (219,708) (17,942)  
Foreign currency exchange (1,880,957) 3,256,343  
GUC (2,896,289)    
Balances at the end of the period R$ 11,604,971 R$ 16,357,918 11,567,882
Leases | Lease without purchase option: Others      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Average remaining term 5 years 6 months 4 years 9 months 18 days  
Weighted average rate p.a 16.90% 11.50%  
Balances at the beginning of the period R$ 269,886 R$ 237,254  
Additions 15,922 64,138  
Modifications 20,362 2,544  
Payments (96,931) (83,264)  
Interest incurred 28,151 24,350  
Transfers 0 0  
Write-offs (969) (12,916)  
Foreign currency exchange (16,748) 37,780  
GUC 0    
Balances at the end of the period R$ 219,673 R$ 269,886 237,254
Leases | Lease with purchase option: Aircraft and engines      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Average remaining term 4 years 10 months 24 days 4 years  
Weighted average rate p.a 16.10% 14.50%  
Balances at the beginning of the period R$ 710,894 R$ 650,691  
Additions 122,902 0  
Modifications 39,690 (8,150)  
Payments (141,311) (188,206)  
Interest incurred 83,182 89,187  
Transfers 0 0  
Write-offs 0 0  
Foreign currency exchange (107,795) 167,372  
GUC 0    
Balances at the end of the period R$ 707,562 R$ 710,894 R$ 650,691