Asset Retirement Obligations, Related Asset Removal Period

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- Definition

European Governmental Support and Wage Subsidies Received, COVID-19

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- Definition

Government Rent Abatements

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Government Rent Abatements, Foreign Governments

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- Definition

Negotiated Rent Abatements, CARES Act

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Property Tax Relief, COVID-19

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- Definition

Reduction in Net Loss Per Share of Common Stock

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Description of timing for satisfying performance obligation in contract with customer. Includes, but is not limited to, as services are rendered, and upon shipment, delivery or completion of service.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2022 USD ($) segment $ / shares	Sep. 30, 2022 segment	Dec. 31, 2023 USD ($) segment $ / shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	May 01, 2019
Property, Plant and Equipment [Line Items]
Amortization of intangible assets			$ 79.0	$ 35.7	$ 22.6
Number of reportable segments \| segment	4	2	4
Non-cash operating lease expense			$ 26.0	51.3	77.0
ARO, removal period			50 years
Revenue, description of timing			Revenue from the sale of advertising is generally recognized ratably over the term of the contract.
Government rent abatements			$ 11.6	15.3
Government rent abatements, European governments			1.0	2.0
Property tax reliefs from government under COVID19				$ 3.9
European governmental support and wage subsidies received, COVID-19					$ 1.0
Change in Accounting Method Accounted for as Change in Estimate
Property, Plant and Equipment [Line Items]
Amortization of intangible assets	$ 16.1		$ 64.4
Reduction in net loss per share of common stock \| $ / shares	$ 0.03		$ 0.13
Trademarks
Property, Plant and Equipment [Line Items]
Intangible asset, useful life						10 years
Minimum \| Permits
Property, Plant and Equipment [Line Items]
Intangible asset, useful life	8 years		11 years	8 years
Minimum \| Furniture and other equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives			3 years
Minimum \| Furniture And Other Equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives			2 years
Minimum \| Building and improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives			10 years
Maximum \| Permits
Property, Plant and Equipment [Line Items]
Intangible asset, useful life	17 years		16 years	17 years
Maximum \| Furniture and other equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives			20 years
Maximum \| Furniture And Other Equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives			20 years
Operating lease, term			15 years
Maximum \| Building and improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives			39 years
Maximum \| Land
Property, Plant and Equipment [Line Items]
Operating lease, term			20 years
Maximum \| Land \| Americas Outdoor
Property, Plant and Equipment [Line Items]
Operating lease, term			12 months