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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Barter and Trade Revenues and Expenses (Detail) - USD ($) $ in Millions | 12 Months Ended
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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

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- 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 + Details
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- 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 + Details
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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. + Details
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- Details
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