Quarterly report pursuant to Section 13 or 15(d)

BASIS OF PRESENTATION AND OTHER INFORMATION (Basis of Presentation and Other Information) (Details)

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BASIS OF PRESENTATION AND OTHER INFORMATION (Basis of Presentation and Other Information) (Details) - USD ($)
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Accounting Policies [Abstract]      
Cash received that includes the face value of tickets sold on behalf of ticketing clients and their share of service charges. $ 614,400,000   $ 837,700,000
Non-cash transactions that are not reflected in our consolidated statements of cash flows 11,800,000    
Tax benefit recognized for losses incurred $ 0 $ 0