RESTRUCTURING COSTS - Schedule of Changes in Restructuring Reserve (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Restructuring Reserve [Roll Forward] | ||
| Restructuring reserve, beginning balance | $ 44.2 | $ 10.4 |
| Paid/Utilized | (13.8) | (7.4) |
| Expense | (8.8) | 3.0 |
| Restructuring reserve, ending balance | 21.6 | 6.0 |
| Severance and benefits | ||
| Restructuring Reserve [Roll Forward] | ||
| Restructuring reserve, beginning balance | 44.1 | 10.3 |
| Paid/Utilized | (13.6) | (6.4) |
| Expense | (8.9) | 2.0 |
| Restructuring reserve, ending balance | 21.6 | 5.9 |
| Plant closing and other | ||
| Restructuring Reserve [Roll Forward] | ||
| Restructuring reserve, beginning balance | 0.1 | 0.1 |
| Paid/Utilized | (0.2) | (1.0) |
| Expense | 0.1 | 1.0 |
| Restructuring reserve, ending balance | $ 0.0 | $ 0.1 |