LONG-TERM DEBT - Surety Bonds, Letters of Credit and Guarantees (Narrative) (Details) $ in Millions	Dec. 31, 2019 USD ($)
Surety bonds
Guarantor Obligations [Line Items]
Outstanding surety bonds, commercial standby letters of credit and bank guarantees	$ 17.1
Commercial standby letters of credit
Guarantor Obligations [Line Items]
Outstanding surety bonds, commercial standby letters of credit and bank guarantees	48.1
iHeartCommunications, Inc. | Commercial standby letters of credit
Guarantor Obligations [Line Items]
Outstanding surety bonds, commercial standby letters of credit and bank guarantees	$ 0.9