v3.26.1
Pension plan obligations (Details 1) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
IfrsStatementLineItems [Line Items]    
Defined benefit obligation, beginning R$ (4,267,083) R$ (5,081,485)
Interest cost 28,454 35,951
Current service cost (28,454) (35,951)
Interest cost (515,623) (463,992)
Actuarial (gains)/losses recorded as other comprehensive income (450,173) 852,128
Benefits paid 489,496 462,217
Defined benefit obligation, ending (4,771,837) (4,267,083)
Fair value of the plan's assets, beginning 2,468,182 2,938,614
Expected return of the plans assets 302,466 274,265
Companys contributions 35,580 39,676
Participants contributions 24,749 30,180
Benefits paid (261,415) (240,667)
Actuarial gains/(losses) recorded as other comprehensive income 62,114 (573,886)
Fair value of the plan's assets, ending 2,631,676 2,468,182
Asset ceiling (132,244)
(Deficit)/Surplus (2,140,161) (1,931,145)
G 1 Plan [Member]    
IfrsStatementLineItems [Line Items]    
Defined benefit obligation, beginning (2,335,938) (2,982,863)
Interest cost (28,454) 35,951
Current service cost 28,454 (35,951)
Interest cost (282,334) (274,718)
Actuarial (gains)/losses recorded as other comprehensive income (345,879) 716,927
Benefits paid 261,415 240,667
Defined benefit obligation, ending (2,731,190) (2,335,938)
Fair value of the plan's assets, beginning 2,468,182 2,938,614
Expected return of the plans assets 302,466 274,265
Companys contributions 35,580 39,676
Participants contributions 24,749 30,180
Benefits paid (261,415) (240,667)
Actuarial gains/(losses) recorded as other comprehensive income 62,114 (573,886)
Fair value of the plan's assets, ending 2,631,676 2,468,182
Asset ceiling (132,244)
(Deficit)/Surplus (99,514)
G 0 Plan [Member]    
IfrsStatementLineItems [Line Items]    
Defined benefit obligation, beginning (1,931,145) (2,098,622)
Interest cost
Current service cost
Interest cost (233,289) (189,274)
Actuarial (gains)/losses recorded as other comprehensive income (104,294) 135,201
Benefits paid 228,081 221,550
Defined benefit obligation, ending (2,040,647) (1,931,145)
Fair value of the plan's assets, beginning
Expected return of the plans assets
Companys contributions
Participants contributions
Benefits paid
Actuarial gains/(losses) recorded as other comprehensive income
Fair value of the plan's assets, ending
Asset ceiling
(Deficit)/Surplus R$ (2,040,647) R$ (1,931,145)