ACCOUNTING POLICIES (Employee Liabilities) (Details) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2025
USD ($)
installment
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
method
plan
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] | |||
| Number of installments, repayment | installment | 148 | ||
| Monthly fee burden | 1 | ||
| Deferred compensation share-based arrangements, liability | $ 84.7 | $ 86.0 | |
| Stock granted, value | $ 93.3 | $ 94.0 | |
| Usiminas | |||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | |||
| Number of post retirement plans | plan | 2 | ||
| Number of payment methods for post retirement plans | method | 2 | ||
| Incentive Retention Program | Capital Units | |||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | |||
| Vesting period (years) | 4 years | ||
| Redemption, period (years) | 10 years | ||
| Early redemption, period (years) | 7 years | ||
| Mandatory redemption period (years) | 7 years |