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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Voluntary Filing Under Chapter 11 (Narrative) (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) segment	May 01, 2019 USD ($)	Apr. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)
Subsequent Event [Line Items]
Number of operating segments \| segment	2
Long-term debt	$ 5,765,416,000			$ 15,195,582,000
iHeartCommunications, Inc.
Subsequent Event [Line Items]
Long-term debt		$ 5,800,000,000	$ 16,000,000,000
Secured Debt
Subsequent Event [Line Items]
Long-term debt	4,322,263,000			0
Secured Debt \| Term Loan Facility
Subsequent Event [Line Items]
Long-term debt	$ 2,251,271,000	3,500,000,000		0
Term loan		3,500,000,000
Stated interest rate	5.25%
Secured Debt \| Term Loan Facility \| iHeartCommunications, Inc.
Subsequent Event [Line Items]
Term loan		3,500,000,000.0
Secured Debt \| 6.375% Senior Secured Notes due 2026
Subsequent Event [Line Items]
Long-term debt	$ 800,000,000	800,000,000		$ 0
Term loan	$ 800,000,000	800,000,000
Stated interest rate	6.375%
Senior Notes \| 8.375% Senior Unsecured Notes due 2027 \| iHeartCommunications, Inc.
Subsequent Event [Line Items]
Term loan		$ 1,450,000,000.00
Stated interest rate		8.375%
Senior Notes \| 6.375% Senior Secured Notes due 2026 \| iHeartCommunications, Inc.
Subsequent Event [Line Items]
Term loan		$ 800,000,000
Stated interest rate		6.375%
Revolving Credit Facility \| Line of Credit \| ABL Facility \| iHeartCommunications, Inc.
Subsequent Event [Line Items]
Maximum borrowing capacity		$ 450,000,000