INCOME TAXES (Details 5) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Sep. 30, 2019 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Reconciliation of Unrecognized Tax Benefits [Roll Forward] | |||
| Beginning balance | $ 33.8 | $ 36.3 | |
| Increase for current year tax positions | 2.0 | 2.1 | |
| Increase for prior year tax positions | 1.5 | 0.3 | |
| Decrease for prior year tax positions | $ 14.3 | 14.3 | 4.9 |
| Decrease due to tax settlements | (0.2) | 0.0 | |
| Ending balance | $ 22.8 | $ 33.8 | |