| Document and Entity Information | Dec. 13, 2021 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001334978 |
| Document Type | 8-K |
| Document Period End Date | Dec. 13, 2021 |
| Entity Registrant Name | CLEAR CHANNEL OUTDOOR HOLDINGS, INC. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-32663 |
| Entity Tax Identification Number | 88-0318078 |
| Entity Address, Address Line One | 4830 North Loop 1604W |
| Entity Address, Address Line Two | Suite 111 |
| Entity Address, City or Town | San Antonio |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 78249 |
| City Area Code | (210) |
| Local Phone Number | 547-8800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock |
| Trading Symbol | CCO |
| Security Exchange Name | NYSE |
| Preferred Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Preferred Stock Purchase Rights |
| Security Exchange Name | NYSE |
