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LONG-TERM DEBT - Schedule of Long-term Debt (Details) - USD ($) |  |  |  |  |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 17, 2018 | Aug. 16, 2018 | Jun. 29, 2018 | Jun. 14, 2018 | Jan. 16, 2018 | Jan. 04, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Feb. 04, 2019 | Jun. 01, 2018 | Mar. 26, 2018
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Consolidated Secured Debt |  |  |  |  |  |  | $ 3,882,000 | $ 13,283,883,000 |  |  |  |
Total debt |  |  |  |  |  |  | 20,472,917,000 | 20,649,181,000 |  |  |  |
Long-term debt fees |  |  |  |  |  |  | (25,808,000) | (109,071,000) |  |  |  |
Debt subject to compromise |  |  |  |  |  |  | 15,149,477,000 | 0 |  |  |  |
Less: current portion |  |  |  |  |  |  | 46,332,000 | 14,972,367,000 |  |  |  |
Total long-term debt |  |  |  |  |  |  | 5,277,108,000 | 5,676,814,000 |  |  |  |
Draws on revolving credit facilities |  |  |  |  |  |  | 143,332,000 | 100,000,000 | $ 100,000,000 |  |  |
Payments on credit facilities |  |  |  |  |  |  | $ 258,308,000 | 25,909,000 | $ 2,100,000 |  |  |
Interest Rate |  |  |  |  |  |  | 8.75% |  |  |  |  |
Write-off of deferred long-term debt fees |  |  |  |  |  |  | $ 67,079,000 |  |  |  |  |
Write-off of original issue discount on debt subject to compromise |  |  |  |  |  |  | 131,100,000 |  |  |  |  |
Term Loan |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Consolidated Secured Debt |  |  |  |  |  |  | 0 | 6,300,000,000 |  |  |  |
Receivables Based Credit Facility Due 2019 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Consolidated Secured Debt |  |  |  |  |  |  | 0 | 405,000,000 |  |  |  |
DIP Facility |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Consolidated Secured Debt |  |  |  |  |  |  | 0 | 0 |  |  |  |
Draws on revolving credit facilities |  |  |  |  |  |  | 125,000,000 |  |  |  |  |
Priority Guarantee Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Consolidated Secured Debt |  |  |  |  |  |  | $ 0 | 6,570,361,000 |  |  |  |
Interest Rate |  |  |  |  |  |  | 9.00% |  |  |  |  |
CCO Receivables Based Credit Facility Due 2023 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Consolidated Secured Debt |  |  |  |  |  |  | $ 0 | 0 |  |  |  |
Other Secured Subsidiary Debt |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Consolidated Secured Debt |  |  |  |  |  |  | 3,882,000 | 8,522,000 |  |  |  |
14.0% Senior Notes Due 2021 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  | $ 0 | $ 1,763,925,000 |  |  |  |
Interest Rate |  |  |  |  |  |  | 14.00% | 14.00% |  |  |  | 14.00%
Legacy Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  | $ 0 | $ 475,000,000 |  |  |  |
10.0% Senior Notes Due 2018 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  | $ 0 | $ 47,482,000 |  |  |  |
Interest Rate |  |  |  |  |  |  | 10.00% | 10.00% |  |  |  |
Subsidiary Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  | $ 5,300,000,000 | $ 5,300,000,000 |  |  |  |
Other Subsidiary Debt |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  | 46,105,000 | 24,615,000 |  |  |  |
Purchase accounting adjustments and original issue discount |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  | $ (739,000) | (136,653,000) |  |  |  |
Priority Guarantee Notes Due 2019 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  |  | 9.00% |  |  |  |  |
11.25% Priority Guarantee Notes due 2021 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  |  | 11.25% |  |  |  |  |
Priority Guarantee Notes Due 2022 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  |  | 9.00% |  |  |  |  |
10.625% Priority Guarantee Notes due 2023 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  |  | 10.625% |  |  |  |  |
Line of Credit | DIP Facility |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 450,000,000.0 |  |  |  |  |
Letters of credit outstanding |  |  |  |  |  |  | 70,200,000 |  |  |  |  |
Borrowing capacity |  |  |  |  |  |  | 342,300,000 |  |  |  |  |
Secured debt | DIP Facility |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Payments on credit facilities | $ 25,000,000 | $ 100,000,000 |  |  |  |  |  |  |  |  |  |
Subsidiary Senior Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  | 5,300,000,000 | 5,300,000,000 |  |  |  |
Subsidiary Senior Notes | 7.625% Series A Senior Subordinated Notes Due 2020 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  | $ 275,000,000 | $ 275,000,000 |  |  |  |
Interest Rate |  |  |  |  |  |  | 7.625% | 7.625% |  |  |  |
Subsidiary Senior Notes | 7.625% Series B Senior Subordinated Notes Due 2020 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  | $ 1,925,000,000 | $ 1,925,000,000 |  |  |  |
Interest Rate |  |  |  |  |  |  | 7.625% | 7.625% |  |  |  |
Legacy Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  | $ 475,000,000 | $ 475,000,000 |  |  |  |
iHeartCommunications | 10.0% Senior Notes Due 2018 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Repaid at maturity |  |  |  |  | $ 42,100,000 | $ 5,300,000 |  |  |  |  |  |
iHeartCommunications | Line of Credit | DIP Facility |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
DIP Facility |  |  |  | $ 450,000,000.0 |  |  |  |  |  |  |  |
Draws on revolving credit facilities |  |  |  | 125,000,000 |  |  |  |  |  |  |  |
iHeartCommunications | Secured debt | Receivables Based Credit Facility Due 2019 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Payments on credit facilities |  |  |  | $ 306,400,000 |  |  |  |  |  |  |  |
iHeartCommunications | Senior Notes | 10.0% Senior Notes Due 2018 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Senior notes exchanged for Priority Guarantee Notes |  |  |  |  | $ 42,100,000 | $ 5,400,000 |  |  |  |  |  |
iHeartCommunications | Senior Notes | Legacy Notes Due 2018 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan |  |  |  |  |  |  | $ 175,000,000.0 |  |  |  |  |
Interest Rate |  |  |  |  |  |  | 6.875% |  |  |  |  |
iHeartCommunications | Senior Notes | Legacy Notes Due 2027 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan |  |  |  |  |  |  | $ 300,000,000.0 |  |  |  |  |
Interest Rate |  |  |  |  |  |  | 7.25% |  |  |  |  |
iHeartCommunications | Senior Notes | Legacy Notes Due 2016 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan |  |  |  |  |  |  | $ 57,100,000.0 |  |  |  |  |
Interest Rate |  |  |  |  |  |  | 5.50% |  |  |  |  |
LIBOR | iHeartCommunications | Line of Credit | DIP Facility |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 2.25% |  |  |  |  |  |  |  |
Revolving credit facility | iHeartCommunications | CCO Receivables Based Credit Facility Due 2023 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  | $ 125,000,000.0 |  |  |  |  |  |  |  |  |
Minimum incremental increase in capacity |  |  | $ 50,000,000 |  |  |  |  |  |  |  |  |
Revolving credit facility | iHeartCommunications | Receivables Based Credit Facility Due 2023 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  | $ 75,000,000.0 |
Revolving credit facility | iHeartCommunications | Line of Credit | Receivables Based Credit Facility Due 2019 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Payments on credit facilities |  |  |  | $ 74,300,000 |  |  |  |  |  |  |  |
Revolving credit facility | iHeartCommunications | Line of Credit | DIP Facility |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
DIP Facility |  |  |  | 450,000,000 |  |  |  |  |  |  |  |
Revolving credit facility | iHeartCommunications | Line of Credit | CCO Receivables Based Credit Facility Due 2023 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
DIP Facility |  |  |  | $ 75,000,000 |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 125,000,000 |  |  |  |  |
Credit facility term |  |  | 5 years |  |  |  |  |  |  |  |  |
Letters of credit outstanding |  |  |  |  |  |  | 94,400,000 |  |  |  |  |
Borrowing capacity |  |  |  |  |  |  | 30,600,000 |  |  |  |  |
Availability Block Requirement | Line of Credit | DIP Facility |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowing capacity |  |  |  |  |  |  | 37,500,000 |  |  |  |  |
Liabilities Subject To Compromise | Term Loan |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Consolidated Secured Debt |  |  |  |  |  |  | 6,300,000,000 |  |  |  |  |
Liabilities Subject To Compromise | Priority Guarantee Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Consolidated Secured Debt |  |  |  |  |  |  | 1,750,000,000 |  |  |  |  |
Liabilities Subject To Compromise | Other Secured Subsidiary Debt |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Consolidated Secured Debt |  |  |  |  |  |  | 6,100,000 |  |  |  |  |
Liabilities Subject To Compromise | 14.0% Senior Notes Due 2021 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan |  |  |  |  |  |  | 1,781,600,000.0 |  |  |  |  |
Liabilities Subject To Compromise | Legacy Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan |  |  |  |  |  |  | 475,000,000 |  |  |  |  |
Liabilities Subject To Compromise | Other Subsidiary Debt |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term loan |  |  |  |  |  |  | 16,500,000.0 |  |  |  |  |
Liabilities Subject To Compromise | Priority Guarantee Notes Due 2019 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Consolidated Secured Debt |  |  |  |  |  |  | 1,999,800,000 |  |  |  |  |
Liabilities Subject To Compromise | 11.25% Priority Guarantee Notes due 2021 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Consolidated Secured Debt |  |  |  |  |  |  | 870,500,000 |  |  |  |  |
Liabilities Subject To Compromise | Priority Guarantee Notes Due 2022 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Consolidated Secured Debt |  |  |  |  |  |  | 1,000,000,000 |  |  |  |  |
Liabilities Subject To Compromise | 10.625% Priority Guarantee Notes due 2023 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total Consolidated Secured Debt |  |  |  |  |  |  | $ 950,000,000 |  |  |  |  |
Subsequent Event | Subsidiary Senior Notes | 7.625% Series A Senior Subordinated Notes Due 2020 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  |  |  |  | $ 275,000,000 |  |
Interest Rate |  |  |  |  |  |  |  |  |  | 7.625% |  |
Subsequent Event | Subsidiary Senior Notes | 7.625% Series B Senior Subordinated Notes Due 2020 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  |  |  |  | $ 1,925,000,000 |  |
Interest Rate |  |  |  |  |  |  |  |  |  | 7.625% |  |
Subsequent Event | Subsidiary Senior Notes | New CCWH Subordinated Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  |  |  |  | $ 2,235,000,000 |  |
Interest Rate |  |  |  |  |  |  |  |  |  | 9.25% |  |

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