FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of Fair Value Level of Inputs

Below are the three levels of inputs that may be used to measure fair value:

Level 1	Quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.
Level 2	Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Level 3	Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The significant unobservable inputs used to determine the fair value of the individual tower and acquired network location intangible assets subject to impairment in 2023 and 2022 included the following:

	Year Ended December 31,
	2023		2022
	Range	Weighted Average	Range	Weighted Average
Terminal growth rates on cash flows (1)	2% to 7%	3%	3% to 7%	3%
Weighted average cost of capital (2)	6% to 46%	10%	6% to 35%	13%

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(1)On a local currency basis.

(2)Specific to the country of each impaired asset. Due to the underlying economic characteristics of the markets the Company operates in, the weighted average cost of capital may vary significantly from market to market.

The significant unobservable inputs used to determine the fair value of the Spain reporting until as of December 31, 2023 included the following:

	2023
Terminal growth rates on cash flows	2%
Weighted average cost of capital	7%

Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis

The fair values of the Company’s financial assets and liabilities that are required to be measured on a recurring basis at fair value were as follows:

	December 31, 2023					December 31, 2022
	Fair Value Measurements Using					Fair Value Measurements Using
	Level 1		Level 2		Level 3	Level 1		Level 2		Level 3
Assets:
Investments in equity securities (1)	$	28.2	$	5.3	—	$	29.2	—		—
VIL OCDs	—		$	192.3	—	—		—		—
Liabilities:
Interest rate swap agreements	—		—		—	—		$	6.2	—
Fair value of debt related to interest rate swap agreements (2)	—		—		—	$	(4.9)	—		—

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(1)    Investments in equity securities are recorded in Notes receivable and other non-current assets in the consolidated balance sheet at fair value. Unrealized holding gains and losses for equity securities are recorded in Other income (expense) in the consolidated statements of operations in the current period.

During the years ended December 31, 2023 and 2022, the Company recognized unrealized gains (losses) of $4.3 million and $(16.7) million, respectively, for equity securities held as of December 31, 2023.

(2)    Included in the carrying values of the corresponding debt obligations as of December 31, 2022. As of December 31, 2023, the interest rate swap agreements under the 3.000% Notes were settled.

Schedule of Percentages of the Asset Class that were Subject to Fair Value Measurement and Subsequently Impaired

The table below indicates the percentages of the asset class that were subject to fair value measurement and subsequently impaired for the years ended December 31, 2023 and 2022:

	2023	2022
Towers and related assets	1%	1%
Acquired network location intangible assets	1%	2%
Acquired tenant-related intangible assets	1%	5%