DEBT - Short-term Debt (Details) - USD ($) $ in Millions |
Mar. 31, 2025 |
Mar. 31, 2024 |
|---|---|---|
| Short-Term Debt [Line Items] | ||
| Total | $ 1,150.0 | $ 24.6 |
| Unamortized discount and issuance costs | (1.5) | 0.0 |
| Short-term debt, net | 1,148.5 | 24.6 |
| Significant other observable inputs (level 2) | ||
| Short-Term Debt [Line Items] | ||
| Total | $ 1,152.6 | $ 24.6 |
| 2025 Notes | ||
| Short-Term Debt [Line Items] | ||
| Annual Interest Rate | 3.55% | 3.55% |
| Total | $ 600.0 | |
| 2025 Notes | Significant other observable inputs (level 2) | ||
| Short-Term Debt [Line Items] | ||
| Total | $ 599.9 | |
| 2026 Notes | ||
| Short-Term Debt [Line Items] | ||
| Annual Interest Rate | 5.00% | 5.00% |
| Total | $ 550.0 | |
| 2026 Notes | Significant other observable inputs (level 2) | ||
| Short-Term Debt [Line Items] | ||
| Total | $ 552.7 | |
| 2024 Convertible Notes | ||
| Short-Term Debt [Line Items] | ||
| Annual Interest Rate | 0.25% | |
| Total | $ 24.6 | |
| 2024 Convertible Notes | Significant other observable inputs (level 2) | ||
| Short-Term Debt [Line Items] | ||
| Total | $ 24.6 |