Quarterly report pursuant to Section 13 or 15(d)

REVENUE RECOGNITION Ticketing Contract Advances (Details)

v3.8.0.1
REVENUE RECOGNITION Ticketing Contract Advances (Details) - Ticketing [Member] - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Capitalized Contract Cost [Line Items]      
Amortization of ticketing contract advances $ 42.2 $ 40.1  
Prepaid Expenses and Other Current Assets [Member]      
Capitalized Contract Cost [Line Items]      
Ticketing contract advances 66.8   $ 76.0
Other Noncurrent Assets [Member]      
Capitalized Contract Cost [Line Items]      
Ticketing contract advances $ 78.1   $ 78.6