| **STOCK BASED COMPENSATION - Stock Incentive Plan (Details) - USD ($) $ in Millions** | 6 Months Ended |
|---------------------------------------------------------------------------------------|----------------|
||
| **Share-Based Payment Arrangement [Abstract]**                                        |           |   |
| Stock-based compensation expense                                                      | $ 27.4         | $ 22.8 |
| Recognized income tax benefits associated with stock-based compensation expense       | $ 3.4          | $ 3.0 |

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| - References
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| - Definition
Amount of tax benefit for recognition of expense of award under share-based payment arrangement.
+ References
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| - Definition
Amount of noncash expense for share-based payment arrangement.
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