BASIS OF PRESENTATION (Policies)	9 Months Ended
BASIS OF PRESENTATION (Policies)	Sep. 30, 2018
Accounting Policies [Abstract]
Principles of Consolidation	The accompanying consolidated financial statements were prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) and, in the opinion of management, include all normal and recurring adjustments necessary to present fairly the results of the interim periods shown. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted pursuant to such SEC rules and regulations. Management believes that the disclosures made are adequate to make the information presented not misleading. Due to seasonality and other factors, the results for the interim periods may not be indicative of results for the full year. The financial statements contained herein should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s 2017 Annual Report on Form 10-K. The consolidated financial statements include the accounts of the Company and its subsidiaries. Also included in the consolidated financial statements are entities for which the Company has a controlling financial interest or is the primary beneficiary. Investments in companies in which the Company owns 20% to 50% of the voting common stock or otherwise exercises significant influence over operating and financial policies of the company are accounted for under the equity method. All significant intercompany transactions are eliminated in the consolidation process.
New Accounting Pronouncements Recently Adopted and Not Yet Adopted	New Accounting Pronouncements Recently Adopted Revenue from Contracts with Customers As of January 1, 2018, the Company adopted the new accounting standard, ASC 606, Revenue from Contracts with Customers. This standard provides guidance for the recognition, measurement and disclosure of revenue from contracts with customers and supersedes previous revenue recognition guidance under U.S. GAAP. The Company has applied this standard using the full retrospective method and concluded that its adoption did not have a material impact on the Company’s Consolidated Balance Sheets, Consolidated Statements of Comprehensive Income (Loss), or Consolidated Statements of Cash Flows for prior periods. Please refer to Note 2, Revenues, for more information. New Accounting Pronouncements Not Yet Adopted During the first quarter of 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842). The new leasing standard presents significant changes to the balance sheets of lessees. The most significant change to the standard includes the recognition of right-of-use assets and lease liabilities by lessees for those leases classified as operating leases. Lessor accounting also is updated to align with certain changes in the lessee model and the new revenue recognition standard which was adopted this year. The standard is effective for annual periods, and for interim periods within those annual periods, beginning after December 15, 2018. The standard is expected to have a material impact on our consolidated balance sheet, but is not expected to materially impact our consolidated statement of comprehensive income (loss) or cash flows. The Company is continuing to evaluate the impact of the provisions of this new standard on its consolidated financial statements. In July 2018, The FASB issued ASU No. 2018-11, Leases (Topic 842) - Targeted Improvements. The update provides an additional (optional) transition method to adopt the new lease standard, allowing entities to apply the new lease standard at the adoption date. The Company plans to adopt Topic 842 following this optional transition method. The update also provides lessors a practical expedient to allow them to not separate non-lease components from the associated lease component and instead to account for those components as a single component if certain criteria are met. The updated practical expedient for lessors will not have a material effect to the Company’s consolidated financial statements. During the first quarter of 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350). This update eliminates the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge. Entities will record an impairment charge based on the excess of a reporting unit's carrying amount over its fair value. The standard is effective for annual and any interim impairment tests performed for periods beginning after December 15, 2019. The Company is currently evaluating the impact of the provisions of this new standard on its consolidated financial statements. During the third quarter of 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40), Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract. This update requires that a customer in a cloud computing arrangement that is a service contract follow the internal use software guidance in Accounting Standards Codification (ASC) 350-402 to determine which implementation costs to capitalize as assets. The standard is effective for fiscal years beginning after December 15, 2019. The Company is currently evaluating the impact of the provisions of this new standard on its consolidated financial statements.
Accounts Receivable	Accounts Receivable Accounts receivable are recorded when the Company has an unconditional right to payment, either because it has satisfied a performance obligation prior to receiving payment from the customer or has a non-cancelable contract that has been billed in advance in accordance with the Company’s normal billing terms. Accounts receivable are recorded at the invoiced amount, net of reserves for sales allowances and allowances for doubtful accounts. The Company evaluates the collectability of its accounts receivable based on a combination of factors. In circumstances where it is aware of a specific customer’s inability to meet its financial obligations, it records a specific reserve to reduce the amounts recorded to what it believes will be collected. For all other customers, it recognizes reserves for bad debt based on historical experience of bad debts as a percent of accounts receivable for each business unit, adjusted for relative improvements or deteriorations in the agings and changes in current economic conditions. The Company believes its concentration of credit risk is limited due to the large number and the geographic diversification of its customers.
Revenue Recognition	Revenue Recognition The Company recognizes revenue when or as it satisfies a performance obligation by transferring a promised good or service to a customer. Where third-parties are involved in the provision of goods and services to a customer, revenue is recognized at the gross amount of consideration the Company expects to receive if the Company controls the promised good or service before it is transferred to the customer; otherwise, revenue is recognized at the net amount the Company retains. The Company receives payments from customers based on billing schedules that are established in its contracts, and deferred income is recorded when payment is received from a customer before the Company has satisfied the performance obligation or a non-cancelable contract has been billed in advance in accordance with the Company’s normal billing terms. The primary source of revenue in the iHM segment is the sale of advertising on the Company’s broadcast radio stations, its iHeartRadio mobile application and website, station websites, and national and local live events. Revenues for advertising spots are recognized at the point in time when the advertisement is broadcast or streamed, while revenues for online display advertisements are recognized over time based on impressions delivered or time elapsed, depending upon the terms of the contract. Revenues for event sponsorships are recognized over the period of the event. iHM also generates revenues from programming talent, network syndication, traffic and weather data, and other miscellaneous transactions, which are recognized when the services are transferred to the customer. iHM’s contracts with advertisers are typically a year or less in duration and are generally billed monthly upon satisfaction of the performance obligations. The Americas outdoor and International outdoor segments generate revenue primarily from the sale of advertising space on printed and digital displays, including billboards, street furniture displays, transit displays and retail displays, which may be sold as individual units or as a network package. Revenues from these contracts, which typically cover periods of a few weeks to one year, are generally recognized ratably over the term of the contract as the advertisement is displayed. These segments also generate revenue from production and creative services, which are distinct from the advertising display services, and related revenue is recognized at the point in time the Company installs the advertising copy at the display site. Americas outdoor contracts are generally billed monthly in advance, and International outdoor includes a combination of advance billings and billings upon completion of service. The Company also generates revenue through contractual commissions realized from the sale of national spot and online advertising on behalf of clients of its full-service media representation business, Katz Media, which is reported in the Company’s Other segment. Revenues from these contracts are recognized at the point in time when the advertisements are broadcast. Because the Company is a representative of its media clients and does not control the advertising inventory before it is transferred to the advertiser, the Company recognizes revenue at the net amount of contractual commissions retained for its representation services. The Company’s media representation contracts typically have terms up to ten years in duration and are generally billed monthly upon satisfaction of the performance obligations. The Company recognizes revenue in amounts that reflect the consideration it expects to receive in exchange for transferring goods or services to customers, excluding sales taxes and other similar taxes collected on behalf of governmental authorities (the "transaction price”). When this consideration includes a variable amount, the Company estimates the amount of consideration it expects to receive and only recognizes revenue to the extent that it is probable it will not be reversed in a future reporting period. Because the transfer of promised goods and services to the customer is generally within a year of scheduled payment from the customer, the Company is not typically required to consider the effects of the time value of money when determining the transaction price. Advertising revenue is reported net of agency commissions. Trade and barter transactions represent the exchange of advertising spots or display space for merchandise, services or other assets in the ordinary course of business. The transaction price for these contracts is measured at the estimated fair value of the non-cash consideration received unless this is not reasonably estimable, in which case the consideration is measured based on the standalone selling price of the advertising spots or display space promised to the customer. Revenue is recognized on trade and barter transactions when the advertisements are broadcasted or displayed, and expenses are recorded ratably over a period that estimates when the merchandise, services or other assets received are utilized, or when the event occurs. Trade and barter revenues and expenses from continuing operations are included in consolidated revenue and selling, general and administrative expenses, respectively.