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Cash flow information (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]      
Total debt, beginning balance R$ 9,666,604 R$ 8,857,525 R$ 8,659,420
Increase (decrease) through obtaining or losing control of subsidiaries or other businesses, liabilities arising from financing activities 2,763,026 4,611,757 2,742,805
Business combination     (20,780)
Increase decrease through payments (5,157,819) 5,180,179 2,556,703
Increase decrease through write off     675
Increase (decrease) through effect of changes in foreign exchange rates, liabilities arising from financing activities (987,131) 1,204,927 (474,721)
Increase decrease through interest accrued 452,576 586,977 (611,685)
Increase decrease through interest paid (367,332) 349,353 (145,066)
Increase decrease through Cancellation/expiration 19,008 65,050  
Total debt, ending balance 6,350,916 9,666,604 8,857,525
Borrowings [Domain]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Total debt, beginning balance 1,666,432 2,199,422 1,865,880
Increase (decrease) through obtaining or losing control of subsidiaries or other businesses, liabilities arising from financing activities 2,626,479 1,666,432 2,252,550
Business combination     (978)
Increase decrease through payments (3,768,173) 2,255,259 1,833,937
Increase decrease through write off     0
Increase (decrease) through effect of changes in foreign exchange rates, liabilities arising from financing activities (311,426) 66,632 (147,802)
Increase decrease through interest accrued 104,790 91,881 (61,753)
Increase decrease through interest paid (80,208) 102,676 0
Increase decrease through Cancellation/expiration 0 0  
Total debt, ending balance 237,894 1,666,432 2,199,422
Lease liabilities [member]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Total debt, beginning balance 311,347 304,762 285,638
Increase (decrease) through obtaining or losing control of subsidiaries or other businesses, liabilities arising from financing activities 136,547 157,750 116,774
Business combination     (19,802)
Increase decrease through payments (123,150) 125,966 132,737
Increase decrease through write off     675
Increase (decrease) through effect of changes in foreign exchange rates, liabilities arising from financing activities (9,055) 20,716 (6,967)
Increase decrease through interest accrued 14,736 19,135 (22,927)
Increase decrease through interest paid 0 0 0
Increase decrease through Cancellation/expiration 19,008 65,050  
Total debt, ending balance 311,417 311,347 304,762
Debentures [Member]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Total debt, beginning balance 1,874,875 2,806,774 2,596,519
Increase (decrease) through obtaining or losing control of subsidiaries or other businesses, liabilities arising from financing activities 0 0 373,481
Business combination     0
Increase decrease through payments (1,266,496) 1,170,612 527,687
Increase decrease through write off     0
Increase (decrease) through effect of changes in foreign exchange rates, liabilities arising from financing activities 0 0 0
Increase decrease through interest accrued 66,313 271,451 (392,857)
Increase decrease through interest paid (23,717) 32,738 (28,396)
Increase decrease through Cancellation/expiration 0 0  
Total debt, ending balance 650,975 1,874,875 2,806,774
Fair value adjustments, liabilities arising from financing activities 3,840 (200,648)  
Bonds [Domain]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Total debt, beginning balance 5,813,950 3,546,567 3,911,383
Increase (decrease) through obtaining or losing control of subsidiaries or other businesses, liabilities arising from financing activities 0 2,787,575 0
Business combination     0
Increase decrease through payments 0 1,628,342 62,342
Increase decrease through write off     0
Increase (decrease) through effect of changes in foreign exchange rates, liabilities arising from financing activities (666,650) 1,117,579 (319,952)
Increase decrease through interest accrued 266,737 204,510 (134,148)
Increase decrease through interest paid (263,407) 213,939 (116,670)
Increase decrease through Cancellation/expiration 0 0  
Total debt, ending balance 5,150,630 5,813,950 R$ 3,546,567
Fair value adjustments, liabilities arising from financing activities R$ (113,541) R$ (300,209)