v3.26.1
EMPLOYEE BENEFITS (Tables)
12 Months Ended
Dec. 31, 2025
Employee Benefits  
Schedule of actuarial employee benefit asset and liabilities
             
              Consolidated
  12/31/2025   12/31/2024   12/31/2025   12/31/2024
  Actuarial asset   Actuarial liabilities
Benefits of pension plans  (53,328)   (47,708)    23,255    18,884
Post-employment healthcare benefits          379,160    454,162
   (53,328)   (47,708)    402,415    473,046
Schedule of reconciliation of employee benefits' assets and liabilities
         
          Consolidated
  12/31/2025   12/31/2024   12/31/2023
Present value of defined benefit obligation 2,888,441   2,904,023   3,329,075
Fair value of plan assets  (3,526,884)    (3,683,575)    (3,713,099)
Deficit(Surplus) (638,443)   (779,552)   (384,024)
Restriction to actuarial assets due to recovery limitation  608,370    750,728    367,265
Liabilities (Assets), net  (30,073)   (28,824)   (16,759)
Schedule of defined benefit obligation
         
          Consolidated
  12/31/2025   12/31/2024   12/31/2023
Present value of obligations at the beginning of the year 2,904,023   3,329,075   3,117,307
Cost of service 1,244    1,509    1,152
Interest cost  345,681    298,872    347,297
Participant contributions made in the year 1,178    1,348    1,404
Benefits paid (343,403)   (334,094)   (324,750)
Actuarial loss/(gain) (20,282)   (392,687)    186,665
Present value of obligations at the end of the year 2,888,441   2,904,023   3,329,075
Schedule of changes in fair value of the plan
         
          Consolidated
  12/31/2025   12/31/2024   12/31/2023
Fair value of plan assets at the beginning of the year  (3,683,575)    (3,713,099)    (3,572,869)
Interest income (444,752)   (335,322)   (401,054)
Benefits Paid  341,856    333,037    324,750
Participant contributions made in the year  (1,178)   (1,348)   (1,404)
Employer contributions made in the year  (1,168)   (165)   (184)
Return on plan assets (less interest income)  261,933    33,322   (62,338)
Fair value of plan assets at the end of the year  (3,526,884)    (3,683,575)    (3,713,099)
Schedule of employee benefits recognized income statement
         
          Consolidated
  12/31/2025   12/31/2024   12/31/2023
Cost of current service 1,244   1,509   1,152
Interest cost  345,681    298,872    347,297
Expected return on plan assets (444,752)   (335,322)   (401,054)
Interest on the asset ceiling effect 95,231    34,663    50,076
Total costs / (income), net  (2,596)   (278)   (2,529)
Schedule of actuarial gains and losses
         
          Consolidated
  12/31/2025   12/31/2024   12/31/2023
Actuarial losses and (gains)  (20,282)   (392,687)    186,665
Return on plan assets (less interest income)  261,933    33,322   (62,338)
Change in the asset’s limit (excluding interest income) (237,589)    348,800   (109,355)
Total cost of actuarial losses and (gains) 4,062   (10,565)    14,972
Schedule of breakdown of actuarial gains and losses
         
          Consolidated
  12/31/2025   12/31/2024   12/31/2023
Loss due to change in financial assumptions   (27,989)   (448,752)    194,988
Loss due to experience adjustments 7,707    60,215   (13,933)
Loss due to changes in assumptions      (4,150)   5,610
Return on plan assets (less interest income)  261,933    33,322   (62,338)
Change in the asset’s limit (excluding interest income) (237,589)    348,800   (109,355)
Actuarial losses and (gains) 4,062   (10,565)    14,972
Schedule of actuarial assumptions used
     
  12/31/2025   12/31/2024
Actuarial financing method Projected unit credit   Projected unit credit
Functional currency Real (R$)   Real (R$)
Recognition of plan assets Fair value   Fair value
Real discount rate Millennium Plan: 7.30%   Millennium Plan: 7.12%
Plan 35%: 7.60%
  Plan 35%: 7.46%
Supplementation: 7.54%    Supplementation: 7.43% 
Mauá Prev: 7.39%   Mauá Prev: 7.34%
Inflation rate 4.05%   4,96%
Nominal salary increase rate 1.00%   1.00%
Nominal benefit increase rate 4.05%   4,96%
Rate of return on investments Millennium Plan: 7.30%   Millennium Plan: 7.12%
Plan 35%: 7.60%   Plan 35%: 7.46%
Supplementation : 7.54%   Supplementation : 7.43%
Mauá Prev: 7.39%   Mauá Prev: 7.34%
General mortality table Millennium Plan: AT-2012 segregated by gender   Millennium Plan: AT-2012 segregated by gender
Plans 35% : AT-2000 Male, aggravated by 15%   Plans 35% : AT-2000 Male, aggravated by 15%
Supplementation: AT-2000 segregated by gender, aggravated by 10%   Supplementation: AT-2000 segregated by gender, aggravated by 10%
Mauá Prev: AT-2012 segregated by gender   Mauá Prev: AT-2012 segregated by gender
  Millennium Plan: Easy light   Millennium Plan: Easy light
Disability table Mauá Prev and ACT: ALVARO VINDAS (D50%)   Mauá Prev and ACT: ALVARO VINDAS (D50%)
Other Plans: Not applicable   Other Plans: Not applicable
     
Disability mortality table Millennium Plan: AT 71   Millennium Plan: AT 71
Plans 35%: MI-2006 - 10% M&F   Plans 35%: MI-2006 - 10% M&F
Supplementation: Winklevoss - 10%   Supplementation: Winklevoss - 10%
Mauá Prev and ACT: IAPB-57   Mauá Prev and ACT: IAPB-57
Turnover table Millennium Plan 5% per year   Millennium Plan 5% per year
Maua Prev: MercerService   Maua Prev: MercerService
Other Plans: Not applicable   Other Plans: Not applicable
Retirement age  100% on the first date he/she becomes eligible for programmed retirement benefit under the plan     100% on the first date he/she becomes eligible for programmed retirement benefit under the plan 
Household of active participants  For the Mauá Prev and ACT Plans, 90% of participants are expected to be married at retirement, while this figure is 95% for other Plans. Female spouses are assumed to be 4 years younger than male participants.     For the Mauá Prev and ACT Plans, 90% of participants are expected to be married at retirement, while this figure is 95% for other Plans. Female spouses are assumed to be 4 years younger than male participants. 
Schedule of average expectancy
                           
  Plan covering 35% of the average salary   Average salary supplementation plan   Mixed supplementary benefit plan (Milênio Plan)    Plan ACT   Mauá Prev
Longevity at age of 65 for current participants 12/31/2025 12/31/2024   12/31/2025 12/31/2024   12/31/2025 12/31/2024   12/31/2025 12/31/2024   12/31/2025 12/31/2024
Male  18.38  18.38    18.75  18.75    21.47  21.47    21.47  21.47    21.47  21.47
Female  18.38  18.38    21.41  21.41    23.34  23.34    23.34  23.34    23.34  23.34
                             
Longevity at age of 40 for current participants                            
Male  40.15  40.15    40.60  40.60    44.07  44.07    44.07  44.07    44.07  44.07
Female  40.15  40.15    44.41  44.41    46.68  46.68    46.68  46.68    46.68  46.68
Schedule of allocation defined benefit assets
                   
      12/31/2025     12/31/2024       12/31/2023
Variable income  291,676   8.27%  358,124   9.72%    190,455   5.13%
Fixed income 2,786,582   79.01% 2,916,385   79.17%    3,143,056   84.65%
Real estate  266,080   7.54%  225,421   6.12%    201,870   5.44%
Others  182,546   5.18%  183,645   4.99%    177,718   4.78%
Total 3,526,884   100.00% 3,683,575   100.00%    3,713,099   100.00%
Schedule of sensitive analysis
       
      12/31/2025
    Consolidated Effect of Plans  
Assumption: Discount rate        
Sensitivity level   0.5% -0.5%  
Effect on current service cost and on interest on actuarial obligations    (11,114) 11,842  
Effect on present value of obligations    (94,507) 100,779  
         
Assumption: Salary growth        
Sensitivity level   0.5% -0.5%  
Effect on current service cost and on interest on actuarial obligations   21  (20)  
Effect on present value of obligations    805  (773)  
         
Assumption: Mortality table        
Sensitivity level   0.5% -0.5%  
Effect on current service cost and on interest on actuarial obligations   1,636 (1,636)  
Effect on present value of obligations   13,894  (13,894)  
         
Assumption: Benefit adjustment        
Sensitivity level   +1 ano - 1 ano  
Effect on current service cost and on interest on actuarial obligations   8,129 (8,030)  
Effect on present value of obligations   67,802  (66,944)  
Schedule of forecast benefit payments defined benefit plans
     
Forecast payments 2025   2024
Year 1 360,546    349,582
Year 2 332,116    325,518
Year 3 322,471    316,201
Year 4 311,975    306,861
Year 5 301,430    296,668
Next 5 years  1,331,249   1,323,196
Total forecast payments  2,959,787   2,918,026
Schedule of post employment health care plan amounts
       
  12/31/2025 12/31/2024   12/31/2023
Present value of obligations  379,161  454,161    481,118
Liabilities  379,161  454,161    481,118
Schedule of reconciliation of the healthcare liabilities
       
  12/31/2025 12/31/2024   12/31/2023
Actuarial liability at the beginning of the year  454,161  481,118    537,290
Expenses recognized in income for the year 54,897 42,749   58,737
Sponsor’s contributions transferred in prior year  (50,098)  (51,884)    (51,788)
Recognition of actuarial loss/(gain)   (79,799)  (17,822)    (63,121)
Actuarial liability at the end of the year   379,161  454,161    481,118
Schedule of actuarial gains and losses recognized in equity
       
  12/31/2025 12/31/2024   12/31/2023
Actuarial gain (loss) on obligation  (79,799)  (17,822)    (63,121)
Gain/(loss) recognized in shareholders' equity   (79,799)  (17,822)    (63,121)
Schedule of weighted average life
         
  12/31/2025   12/31/2024   12/31/2023
Longevity at age of 65 for current participants          
Male 20.24   20.24   20.24
Female 20.24   20.24   20.24
           
Longevity at age of 40 for current participants          
Male 42.74   42.74   42.74
Female 42.74   42.74   42.74
Schedule of actuarial assumptions used for calculating postemployment healthcare benefits
         
  12/31/2025   12/31/2024   12/31/2023
Biometric and Demographic          
General mortality table AT 2000 separated by gender 20%   AT 2000 separated by gender 20%   AT 2000 segregated by gender 20%
Financial          
Actuarial nominal discount rate 11.96%   13.01%   5.33%
Inflation 4.05%   4.96%   3.90%
Real increase in medical costs based on age (Aging Factor)  0.5% - 3.00% real p.a.   0.5% - 3.00% real p.a.   0.5% - 3.00% real p.a.
Nominal increase medical costs growth rate  4.10%   4.10%   4.10%
Average medical cost (Claim cost)  1,388.26    1,320.89     1,204.48 
Schedule of quantitative sensitivity analysis for significant assumptions
     
      12/31/2025
    Healthcare Plan
    Assumption: Discount rate
Sensitivity level   0.5% -0.5%
Effect on current service cost and on interest on actuarial obligations   510,034 (540,863)
Effect on present value of obligations    (10,629,052) 11,323,696
       
    Assumption: Medical Inflation
Sensitivity level   1.0% -1.0%
Effect on current service cost and on interest on actuarial obligations   3,102,518  (2,773,758)
Effect on present value of obligations   25,945,554  (23,196,224)
       
    Assumption: Benefit adjustment
Sensitivity level   +1 year - 1 year
Effect on current service cost and on interest on actuarial obligations    (2,257,050) 2,340,830
Effect on present value of obligations    (18,875,130) 19,575,759
Schedule of forecast benefit payments of the postemployment healthcare plans
       
Forecast benefit payments   12/31/2025   12/31/2024
Year 1   55,486    66,468
Year 2   52,333    62,452
Year 3   49,160    58,572
Year 4   45,963    54,760
Year 5   42,760    51,020
Next 5 years    167,691    202,310
Total forecast payments    413,393    495,582