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COMMITMENTS AND CONTINGENCIES - Narrative (Detail) - USD ($) $ in Millions |  | 4 Months Ended | 8 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 16, 2018 | May 01, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Oct. 09, 2018 | Mar. 26, 2018 | Mar. 21, 2018
Concentration Risk [Line Items] |  |  |  |  |  |  |  |
Operating lease, expense |  | $ 59.2 | $ 128.3 | $ 169.9 | $ 173.4 |  |  |
6.875% Senior Notes Due 2018 |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  | 6.875% |  | 6.875%
7.25% Senior Notes Due 2027 |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  | 7.25% |  | 7.25%
14.0% Senior Notes Due 2021 |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  | 14.00% |
Chapter 11 Cases | CCOH Separation Settlement |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |
Loss contingency, loss in period | $ 149.0 |  |  |  |  |  |  |
Unsecured Revolving Line of Credit Issued To Debtors | CCOH Separation Settlement |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |
Loss contingency, loss in period | $ 200.0 |  |  |  |  |  |  |
Maximum | Unsecured Revolving Line of Credit Issued To Debtors | CCOH Separation Settlement |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |
Settlement agreement, term | 3 years |  |  |  |  |  |  |

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