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FAIR VALUE MEASUREMENTS - Schedule of Assets and Liabilities at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash, cash equivalents, and restricted cash | $ 133.5 | $ 157.7
Marketable securities | 162.1 | 162.2
EVE Investment | 12.2 | 15.4
Total | 307.8 | 335.3
Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash, cash equivalents, and restricted cash | 133.5 | 157.7
Marketable securities | 162.1 | 162.2
EVE Investment | 2.5 | 4.0
Total | 298.1 | 323.9
Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash, cash equivalents, and restricted cash | 0.0 | 0.0
Marketable securities | 0.0 | 0.0
EVE Investment | 0.0 | 0.0
Total | 0.0 | 0.0
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash, cash equivalents, and restricted cash | 0.0 | 0.0
Marketable securities | 0.0 | 0.0
EVE Investment | 9.7 | 11.4
Total | $ 9.7 | $ 11.4

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