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LONG-TERM DEBT - Clear Channel International B.V. Senior Notes (Narrative) (Details) - USD ($) | Aug. 14, 2017 | Dec. 31, 2018
--- | --- | ---
Debt Instrument [Line Items] |  |
Stated interest rate |  | 8.75%
Senior Notes | Clear Channel International B.V. Senior Notes Due 2020 |  |
Debt Instrument [Line Items] |  |
Stated interest rate | 8.75% | 8.75%
Clear Channel International B.V. | Senior Notes | Clear Channel International B.V. Senior Notes Due 2020 |  |
Debt Instrument [Line Items] |  |
Principal amount of Senior Notes | $ 150,000,000.0 |
Proceeds from issuance of senior long-term debt | $ 156,000,000 |

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