DISCONTINUED OPERATIONS - Cash Flow and Non-Cash Information Related to Discontinued Operations (Details) - Discontinued Operations, Disposed of by Sale - ATC TIPL - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||
| Capital expenditures | $ 0.0 | $ (44.3) | |
| Significant non-cash items: | |||
| Depreciation, amortization and accretion | 0.0 | 81.7 | |
| Stock-based compensation expense | $ 2.0 | 0.0 | 4.1 |
| Impairments, net loss on sale of long-lived assets, non-cash restructuring and merger related expenses | 0.0 | (3.0) | |
| Loss (gain) on investments, unrealized foreign currency loss (gain) and other non-cash expense | $ 0.0 | $ (44.0) | |