Quarterly report pursuant to Section 13 or 15(d)

LONG-LIVED ASSETS (Goodwill) (Details)

v3.21.1
LONG-LIVED ASSETS (Goodwill) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Changes in carrying amount of goodwill [Roll Forward]    
Gross goodwill, beginning of period $ 2,564,566,000  
Accumulated impairment losses (435,363,000)  
Net goodwill, beginning of period 2,129,203,000  
Acquisition—current year 532,000  
Acquisitions—prior year (5,136,000)  
Goodwill impairment   $ 0
Foreign exchange (10,905,000)  
Gross goodwill, end of period 2,549,057,000 2,564,566,000
Accumulated impairment losses (435,363,000) (435,363,000)
Net goodwill, end of period 2,113,694,000 2,129,203,000
Concerts [Member]    
Changes in carrying amount of goodwill [Roll Forward]    
Gross goodwill, beginning of period 1,318,273,000  
Accumulated impairment losses (435,363,000)  
Net goodwill, beginning of period 882,910,000  
Acquisition—current year 532,000  
Acquisitions—prior year (1,815,000)  
Foreign exchange (2,980,000)  
Gross goodwill, end of period 1,314,010,000 1,318,273,000
Accumulated impairment losses (435,363,000) (435,363,000)
Net goodwill, end of period 878,647,000 882,910,000
Ticketing [Member]    
Changes in carrying amount of goodwill [Roll Forward]    
Gross goodwill, beginning of period 782,559,000  
Accumulated impairment losses 0  
Net goodwill, beginning of period 782,559,000  
Acquisition—current year 0  
Acquisitions—prior year (3,740,000)  
Foreign exchange (3,673,000)  
Gross goodwill, end of period 775,146,000 782,559,000
Accumulated impairment losses 0 0
Net goodwill, end of period 775,146,000 782,559,000
Sponsorship and Advertising [Member]    
Changes in carrying amount of goodwill [Roll Forward]    
Gross goodwill, beginning of period 463,734,000  
Accumulated impairment losses 0  
Net goodwill, beginning of period 463,734,000  
Acquisition—current year 0  
Acquisitions—prior year 419,000  
Foreign exchange (4,252,000)  
Gross goodwill, end of period 459,901,000 463,734,000
Accumulated impairment losses 0 0
Net goodwill, end of period $ 459,901,000 $ 463,734,000