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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Barter and Trade Revenues and Expenses (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue Recognition, Milestone Method [Line Items]
Trade and barter revenues	$ 243.3	$ 165.8	$ 133.5
Trade and barter expenses	205.1	115.1	112.1
iHeartMedia Segment
Revenue Recognition, Milestone Method [Line Items]
Trade and barter revenues	226.7	153.3	118.3
Trade and barter expenses	$ 191.1	$ 103.1	$ 103.4

X

- Definition

Total expense recognized from advertising barter transactions for each income statement presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68051663&loc=d3e49171-111630

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X

- Definition

Total revenue recognized from advertising barter transactions for each income statement presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68051663&loc=d3e49171-111630

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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