FAIR VALUE MEASUREMENTS - Activity for Investments (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Fair Value Disclosures [Abstract] | ||||
| Proceeds from Investment Sales | $ 6.6 | $ 0.0 | $ 16.6 | $ 3.0 |
| Purchases of Investments | 5.0 | 1.5 | 6.5 | 3.0 |
| Gross Realized Gains on Investment Sales | 0.2 | 0.0 | 4.2 | 0.3 |
| Gross Realized Losses on Investment Sales | $ 0.3 | $ 0.0 | $ 0.5 | $ 0.2 |