REVENUE RECOGNITION (Performance Obligation) (Details) - Sponsorship and Advertising [Member] $ in Millions  | 
 Jun. 30, 2021  
USD ($) 
 | 
|---|---|
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Revenue related to future benefits to be provided by the Company | $ 1,000.0 | 
| Percentage of revenue on contracts to be recognized during the remainder of 2021 | 22.00% | 
| Percentage of revenue on contracts to be recognized in 2022 | 34.00% | 
| Percentage of revenue on contracts to be recognized in 2023 | 16.00% | 
| Percentage of revenue to be recognized on contracts thereafter | 28.00% | 
| X | ||||||||||
- Definition Represents the percentage of the remaining performance obligation to be recognized as revenue in the first fiscal year following the latest fiscal year. No definition available. 
  | 
| X | ||||||||||
- Definition Represents the percentage of the remaining performance obligation to be recognized as revenue in the remainder of the fiscal year. No definition available. 
  | 
| X | ||||||||||
- Definition Represents the percentage of the remaining performance obligation to be recognized as revenue after the third fiscal year following the latest fiscal year. No definition available. 
  | 
| X | ||||||||||
- Definition Represents the percentage of the remaining performance obligation to be recognized as revenue in the second fiscal year following the latest fiscal year. No definition available. 
  | 
| X | ||||||||||
- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
  | 
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
  | 
| X | ||||||||||
- Details 
  |