v3.26.1
LOANS AND FINANCING - Schedule of Loans and Financing (Details)
R$ in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
BRL (R$)
Jun. 30, 2025
BRL (R$)
Jun. 30, 2026
USD ($)
Jun. 30, 2026
BRL (R$)
Jun. 30, 2025
BRL (R$)
Mar. 31, 2026
Rate
Dec. 31, 2025
BRL (R$)
Disclosure of detailed information about borrowings [line items]              
Balance in the beginning of the period | R$       R$ 23,059,604      
Funding (–) costs | R$       7,585,925      
Payment of principal | R$       (7,975,896)      
Interest payment | R$       (274,654)      
Conversion into shares | R$       (10,298,881)      
GUC | R$ R$ 0 R$ 0   (800,145) R$ 0    
Restructuring effect | R$       108,074      
Interest | R$       (715,156)      
Foreign currency exchange | R$       (934,329)      
Amortized cost | R$       129,485      
Balance at the end of the period | R$ 9,884,027     9,884,027      
Current | R$ 1,347,728     1,347,728     R$ 13,783,259
Non-current | R$ R$ 8,536,299     8,536,299     R$ 9,276,345
Exit notes              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. | Rate           9.90%  
United States of America, Dollars              
Disclosure of detailed information about borrowings [line items]              
Balance in the beginning of the period     $ 21,693,348        
Funding (–) costs     7,255,925        
Payment of principal     (7,952,820)        
Interest payment     (230,232)        
Conversion into shares | R$       (10,298,881)      
GUC | R$       (566,078)      
Restructuring effect | R$       R$ (293,300)      
Interest     (331,547)        
Foreign currency exchange     (934,329)        
Amortized cost     129,485        
Balance at the end of the period     8,471,571        
United States of America, Dollars | Senior notes – 2026              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 0.00%     0.00%      
Effective rate p.a. 0.00%     0.00%      
Balance in the beginning of the period     187,585        
Funding (–) costs     0        
Payment of principal     (2,336)        
Interest payment     0        
Conversion into shares | R$       R$ 0      
GUC | R$       (168,193)      
Restructuring effect | R$       R$ 0      
Interest     (7,049)        
Foreign currency exchange     (10,304)        
Amortized cost     297        
Balance at the end of the period     0        
United States of America, Dollars | Senior notes – 2028              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 0.00%     0.00%      
Effective rate p.a. 0.00%     0.00%      
Balance in the beginning of the period     19,259        
Funding (–) costs     0        
Payment of principal     (183)        
Interest payment     0        
Conversion into shares | R$       R$ 0      
GUC | R$       (17,251)      
Restructuring effect | R$       R$ 0      
Interest     (772)        
Foreign currency exchange     (1,053)        
Amortized cost     0        
Balance at the end of the period     0        
United States of America, Dollars | Senior notes – 2029              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 0.00%     0.00%      
Effective rate p.a. 0.00%     0.00%      
Balance in the beginning of the period     29,246        
Funding (–) costs     0        
Payment of principal     (280)        
Interest payment     0        
Conversion into shares | R$       R$ 0      
GUC | R$       (26,379)      
Restructuring effect | R$       R$ 0      
Interest     (981)        
Foreign currency exchange     (1,606)        
Amortized cost     0        
Balance at the end of the period     0        
United States of America, Dollars | Senior notes – 2030              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 0.00%     0.00%      
Effective rate p.a. 0.00%     0.00%      
Balance in the beginning of the period     192,422        
Funding (–) costs     0        
Payment of principal     (1,493)        
Interest payment     0        
Conversion into shares | R$       R$ 0      
GUC | R$       (174,233)      
Restructuring effect | R$       R$ 0      
Interest     (6,134)        
Foreign currency exchange     (10,562)        
Amortized cost     0        
Balance at the end of the period     0        
United States of America, Dollars | Senior notes 1L – 2028              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 0.00%     0.00%      
Effective rate p.a. 0.00%     0.00%      
Balance in the beginning of the period     6,348,705        
Funding (–) costs     0        
Payment of principal     0        
Interest payment     0        
Conversion into shares | R$       R$ (5,730,235)      
GUC | R$       0      
Restructuring effect | R$       R$ 87,794      
Interest     (564,692)        
Foreign currency exchange     (141,572)        
Amortized cost     0        
Balance at the end of the period     0        
United States of America, Dollars | Senior notes 2L – 2029              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 0.00%     0.00%      
Effective rate p.a. 0.00%     0.00%      
Balance in the beginning of the period     933,400        
Funding (–) costs     0        
Payment of principal     0        
Interest payment     0        
Conversion into shares | R$       R$ (845,232)      
GUC | R$       0      
Restructuring effect | R$       R$ 12,939      
Interest     (80,293)        
Foreign currency exchange     (20,814)        
Amortized cost     0        
Balance at the end of the period     0        
United States of America, Dollars | Senior notes 2L – 2030              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 0.00%     0.00%      
Effective rate p.a. 0.00%     0.00%      
Balance in the beginning of the period     2,133,376        
Funding (–) costs     0        
Payment of principal     0        
Interest payment     0        
Conversion into shares | R$       R$ (1,941,142)      
GUC | R$       0      
Restructuring effect | R$       R$ 29,716      
Interest     (174,378)        
Foreign currency exchange     (47,572)        
Amortized cost     0        
Balance at the end of the period     0        
United States of America, Dollars | DIP – 2026              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 0.00%     0.00%      
Effective rate p.a. 0.00%     0.00%      
Balance in the beginning of the period     9,594,861        
Funding (–) costs     115,359        
Payment of principal     (7,509,038)        
Interest payment     (192,640)        
Conversion into shares | R$       R$ (1,782,272)      
GUC | R$       0      
Restructuring effect | R$       R$ 0      
Interest     192,737        
Foreign currency exchange     (533,335)        
Amortized cost     114,328        
Balance at the end of the period     0        
United States of America, Dollars | Exit notes | Feb-31              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 9.90%     9.90%      
Effective rate p.a. 10.50%     10.50%      
Balance in the beginning of the period     0        
Funding (–) costs     7,046,801        
Payment of principal     0        
Interest payment     0        
Conversion into shares | R$       R$ 0      
GUC | R$       0      
Restructuring effect | R$       R$ 0      
Interest     278,006        
Foreign currency exchange     (75,467)        
Amortized cost     11,912        
Balance at the end of the period     7,261,252        
United States of America, Dollars | Executed letters of credit | Dec-29              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 3.00%     3.00%      
Effective rate p.a. 6.70%     6.70%      
Balance in the beginning of the period     1,376,106        
Funding (–) costs     20,901        
Payment of principal     (74,017)        
Interest payment     (14,824)        
Conversion into shares | R$       R$ 0      
GUC | R$       (179,594)      
Restructuring effect | R$       R$ (423,749)      
Interest     9,246        
Foreign currency exchange     (33,118)        
Amortized cost     0        
Balance at the end of the period     680,951        
United States of America, Dollars | Aircraft, engines and others | Aug-26              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 4.60%     4.60%      
Effective rate p.a. 8.20%     8.20%      
Balance in the beginning of the period     646,364        
Funding (–) costs     0        
Payment of principal     (295,416)        
Interest payment     (15,811)        
Conversion into shares | R$       R$ 0      
GUC | R$       0      
Restructuring effect | R$       R$ 0      
Interest     14,329        
Foreign currency exchange     (45,501)        
Amortized cost     0        
Balance at the end of the period     303,965        
United States of America, Dollars | Aircraft, engines and others | March 29              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 2.60%     2.60%      
Effective rate p.a. 9.80%     9.80%      
Balance in the beginning of the period     220,330        
Funding (–) costs     17,584        
Payment of principal     (62,460)        
Interest payment     (6,370)        
Conversion into shares | R$       R$ 0      
GUC | R$       0      
Restructuring effect | R$       R$ 0      
Interest     6,844        
Foreign currency exchange     (14,383)        
Amortized cost     2,948        
Balance at the end of the period     164,493        
United States of America, Dollars | Aircraft, engines and others | Dec-26              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 4.70%     4.70%      
Effective rate p.a. 4.70%     4.70%      
Balance in the beginning of the period     11,694        
Funding (–) costs     0        
Payment of principal     (7,597)        
Interest payment     (587)        
Conversion into shares | R$       R$ 0      
GUC | R$       (428)      
Restructuring effect | R$       R$ 0      
Interest     225        
Foreign currency exchange     (624)        
Amortized cost     0        
Balance at the end of the period     2,683        
United States of America, Dollars | Aircraft, engines and others | Jul-27              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 11.00%     11.00%      
Effective rate p.a. 11.00%     11.00%      
Balance in the beginning of the period     0        
Funding (–) costs     55,280        
Payment of principal     0        
Interest payment     0        
Conversion into shares | R$       R$ 0      
GUC | R$       0      
Restructuring effect | R$       0      
Interest     1,365        
Foreign currency exchange     1,582        
Amortized cost     0        
Balance at the end of the period     $ 58,227        
Brazil, Brazil Real              
Disclosure of detailed information about borrowings [line items]              
Balance in the beginning of the period | R$       1,366,256      
Funding (–) costs | R$       330,000      
Payment of principal | R$       (23,076)      
Interest payment | R$       (44,422)      
Conversion into shares | R$       0      
GUC | R$       (234,067)      
Restructuring effect | R$       401,374      
Interest | R$       (383,609)      
Foreign currency exchange | R$       0      
Amortized cost | R$       0      
Balance at the end of the period | R$ R$ 1,412,456     R$ 1,412,456      
Brazil, Brazil Real | Executed letters of credit | Dec-35              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 0.00%     0.00%      
Effective rate p.a. 15.70%     15.70%      
Balance in the beginning of the period | R$       R$ 669,542      
Funding (–) costs | R$       0      
Payment of principal | R$       0      
Interest payment | R$       0      
Conversion into shares | R$       0      
GUC | R$       (7,847)      
Restructuring effect | R$       401,374      
Interest | R$       (412,118)      
Foreign currency exchange | R$       0      
Amortized cost | R$       0      
Balance at the end of the period | R$ R$ 650,951     R$ 650,951      
Brazil, Brazil Real | Executed derivatives              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 0.00%     0.00%      
Effective rate p.a. 0.00%     0.00%      
Balance in the beginning of the period | R$       R$ 38,241      
Funding (–) costs | R$       0      
Payment of principal | R$       0      
Interest payment | R$       0      
Conversion into shares | R$       0      
GUC | R$       (38,241)      
Restructuring effect | R$       0      
Interest | R$       0      
Foreign currency exchange | R$       0      
Amortized cost | R$       0      
Balance at the end of the period | R$ R$ 0     R$ 0      
Brazil, Brazil Real | Debentures | Feb-31              
Disclosure of detailed information about borrowings [line items]              
Average nominal rate p.a. 3.00%     3.00%      
Effective rate p.a. 17.60%     17.60%      
Balance in the beginning of the period | R$       R$ 658,473      
Funding (–) costs | R$       0      
Payment of principal | R$       (23,076)      
Interest payment | R$       (44,422)      
Conversion into shares | R$       0      
GUC | R$       (187,979)      
Restructuring effect | R$       0      
Interest | R$       27,989      
Foreign currency exchange | R$       0      
Amortized cost | R$       0      
Balance at the end of the period | R$ R$ 430,985     R$ 430,985      
Brazil, Brazil Real | Working capital | Dec-26              
Disclosure of detailed information about borrowings [line items]              
Effective rate p.a. 14.20%     14.20%      
Balance in the beginning of the period | R$       R$ 0      
Funding (–) costs | R$       330,000      
Payment of principal | R$       0      
Interest payment | R$       0      
Conversion into shares | R$       0      
GUC | R$       0      
Restructuring effect | R$       0      
Interest | R$       520      
Foreign currency exchange | R$       0      
Amortized cost | R$       0      
Balance at the end of the period | R$ R$ 330,520     R$ 330,520