v3.26.1
Pension plan obligations (Details 3) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
IfrsStatementLineItems [Line Items]    
Cost of service, net R$ 3,704 R$ 5,799
Interest cost rates 515,623 463,992
Expected return on the plan's assets (302,466) (274,265)
Interest on the maximum limit of liabilities/(assets) 19,957
Amount received from State of Sao Paulo (undisputed) (104,943) (119,506)
Contributions amount 35,580
Total expenses 167,455 76,020
G 1 Plan [Member]    
IfrsStatementLineItems [Line Items]    
Cost of service, net 3,704 5,799
Interest cost rates 282,334 274,718
Expected return on the plan's assets (302,466) (274,265)
Interest on the maximum limit of liabilities/(assets) 19,957
Amount received from State of Sao Paulo (undisputed)
Contributions amount 35,580
Total expenses 39,109 6,252
G 0 Plan [Member]    
IfrsStatementLineItems [Line Items]    
Cost of service, net
Interest cost rates 233,289 189,274
Expected return on the plan's assets
Interest on the maximum limit of liabilities/(assets)
Amount received from State of Sao Paulo (undisputed) (104,943) (119,506)
Contributions amount
Total expenses R$ 128,346 R$ 69,768