v3.25.4
PENSIONS PLANS AND OTHER POST-EMPLOYMENT BENEFITS (Details 5) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS    
Balance at the beginning of the year R$ 571,513 R$ 1,003,035
Net defined benefit liability 728,559  
Net defined benefit liability 786,546 728,559
Balance at the end of the year 603,639 571,513
Present value of defined benefit obligation [member]    
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS    
Net defined benefit liability 3,503,160 4,085,376
Net defined benefit liability 3,556,624 3,503,160
Current service costs 76,578 (17,843)
Interest on actuarial liabilities 374,090 358,301
Benefits paid 291,027 278,443
Member contributions paid (233) (182)
Actuarial losses (gains) adjusted by experience 25,662 (26,603)
Actuarial losses (gains) adjusted by financial assumptions (71,246) 706,702
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions 1,162 0
Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control    
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS    
Balance at the beginning of the year (91,892) 5,971
Balance at the end of the year (117,397) (91,892)
Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control | Present value of defined benefit obligation [member]    
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS    
Net defined benefit liability 1,954,418 2,167,726
Net defined benefit liability 1,988,953 1,954,418
Current service costs (1,836) (2,037)
Interest on actuarial liabilities 209,624 186,004
Benefits paid 203,926 196,336
Member contributions paid (233) (182)
Actuarial losses (gains) adjusted by experience (1,910) (94,337)
Actuarial losses (gains) adjusted by financial assumptions (24,858) 299,532
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions 0 0
Post-retirement health plans    
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS    
Balance at the beginning of the year 663,405 997,064
Net defined benefit liability 1,548,742  
Net defined benefit liability 1,567,671 1,548,742
Current service costs (78,414)  
Interest on actuarial liabilities 164,466  
Benefits paid (87,101)  
Member contributions paid 0  
Actuarial losses (gains) adjusted by experience 27,572  
Actuarial losses (gains) adjusted by financial assumptions (46,388)  
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions 1,162 0
Balance at the end of the year 721,036 663,405
Post-retirement health plans | Present value of defined benefit obligation [member]    
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS    
Net defined benefit liability R$ 1,548,742 1,917,650
Net defined benefit liability   1,548,742
Current service costs   (15,806)
Interest on actuarial liabilities   172,297
Benefits paid   82,107
Member contributions paid   0
Actuarial losses (gains) adjusted by experience   67,734
Actuarial losses (gains) adjusted by financial assumptions   R$ 407,170