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REVENUE FROM CONTRACTS WITH CUSTOMERS - Narrative (Details) $ in Millions	Mar. 31, 2018 USD ($)
Revenue From Contract With Customer [Abstract]
Revenue, remaining performance obligation	$ 250.4

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- Definition

Revenue From Contract With Customer [Abstract]

+ References

No definition available.

+ Details

Name:	ihrt_RevenueFromContractWithCustomerAbstract
Namespace Prefix:	ihrt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Revenue, Remaining Performance Obligation

+ References

No definition available.

+ Details

Name:	ihrt_RevenueRemainingPerformanceObligation
Namespace Prefix:	ihrt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant