SUPPLEMENTAL CASH FLOW INFORMATION - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Supplemental Cash Flow Elements [Abstract] | ||
| Cash paid for income taxes, net of refunds received | $ (11.1) | $ 0.3 |
| Cash paid for interest | 6.6 | 1.7 |
| Change in operating lease right-of-use assets and lease liabilities | ||
| Operating lease right-of-use assets | 2.8 | 1.8 |
| Operating lease liabilities | (2.8) | (1.8) |
| Tenant improvement allowance not yet received | 6.5 | 0.0 |
| Purchases of property, plant and equipment and capitalization of intangible assets in accounts payable and accrued liabilities | $ 2.0 | $ 4.9 |