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BASIS OF PRESENTATION - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) claim
Segment Reporting Information [Line Items]
Number of proofs of claims | claim	1,200
Amount of proofs of claims | $	$ 99.1
Other
Segment Reporting Information [Line Items]
Revenue from contract with customer, contract term	10 years
Maximum | Americas and International Outdoor Advertising
Segment Reporting Information [Line Items]
Revenue from contract with customer, contract term	1 year

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- Definition

Revenue From Contract With Customer, Contract Term

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- Definition

Amount of bankruptcy claim filed with bankruptcy court.

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The aggregate number of claims filed with the bankruptcy court.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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