INVESTMENTS AND FAIR VALUE MEASUREMENTS - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Financial Assets: | ||
| Short-term investments: | $ 308.1 | $ 0.0 |
| Derivative assets: | 13.1 | |
| Total assets measured at fair value | 3,724.8 | 4,520.0 |
| Money market funds | ||
| Financial Assets: | ||
| Cash equivalents: | 3,403.6 | 4,520.0 |
| Level 1 | ||
| Financial Assets: | ||
| Short-term investments: | 308.1 | |
| Derivative assets: | 0.0 | |
| Total assets measured at fair value | 3,711.7 | 4,520.0 |
| Level 1 | Money market funds | ||
| Financial Assets: | ||
| Cash equivalents: | 3,403.6 | 4,520.0 |
| Level 2 | ||
| Financial Assets: | ||
| Short-term investments: | 0.0 | |
| Derivative assets: | 0.0 | |
| Total assets measured at fair value | 0.0 | 0.0 |
| Level 2 | Money market funds | ||
| Financial Assets: | ||
| Cash equivalents: | 0.0 | 0.0 |
| Level 3 | ||
| Financial Assets: | ||
| Short-term investments: | 0.0 | |
| Derivative assets: | 13.1 | |
| Total assets measured at fair value | 13.1 | 0.0 |
| Level 3 | Money market funds | ||
| Financial Assets: | ||
| Cash equivalents: | $ 0.0 | $ 0.0 |