PENSIONS PLANS AND OTHER POST-EMPLOYMENT BENEFITS (Details 11)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS
Long-term inflation rate in post-retirement pension and health plans	3.50%
Annual increase in the use of medical services according to age	4.00%
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
Nominal annual adjustment rate of pension benefits	3.50%	3.50%
Mortality table for disabled individuals (as a percent)	60.00%	60.00%
Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control \| Minimum
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS
Discount rate to present value of defined benefit liability	10.96%	11.07%
Future salary growth rate	4.57%	4.57%
Estimated retirement age	57 years	57 years
Mortality table for nondisabled individuals (as a percent)	10.00%	10.00%
Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control \| Maximum
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS
Discount rate to present value of defined benefit liability	11.49%	11.67%
Future salary growth rate	6.60%	6.60%
Estimated retirement age	60 years	60 years
Mortality table for nondisabled individuals (as a percent)	50.00%	50.00%
Light-Forte, Álvaro Vindas
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS
Disability table ( as a percent)	50.00%	50.00%
Light-Fraca
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS
Disability table ( as a percent)	50.00%	50.00%
Post-retirement health plans
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS
Medical expense growth rate	6.61%	6.61%
Mortality table for nondisabled individuals (as a percent)	10.00%	10.00%
Mortality table for disabled individuals (as a percent)	60.00%	60.00%
Post-retirement health plans \| Minimum
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS
Discount rate to present value of defined benefit liability	10.79%	11.07%
Medical service eligibility age	59 years	59 years
Estimated retirement age	59 years	59 years
Post-retirement health plans \| Maximum
PENSION PLANS AND OTHER POST-EMPLOYMENT BENEFITS
Discount rate to present value of defined benefit liability	10.96%	11.20%
Medical service eligibility age	63 years	63 years
Estimated retirement age	63 years	63 years

The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [domain]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2025-01-01
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The expected rate of increases in pension that is used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [domain]; Defined benefit obligation, at present value; Actuarial assumptions [domain]]

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The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [domain]; Defined benefit obligation, at present value; Actuarial assumptions [domain]]

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Medical cost trend rate used as significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [domain]]

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Long-term inflation rate in post-retirement pension and health plans

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