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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2011
Contingency related to spectrum fees
Commitments and contingencies
Spectrum fees paid		$ 2.6
Legal claims regarding tax filings with the Guyana Revenue Authority
Commitments and contingencies
Future payments related to disputed tax assessments	$ 44.1
Accrued contingent liability	$ 5.0
Legal claims regarding tax filings with the Guyana Revenue Authority | Minimum
Commitments and contingencies
Percentage of return on investment ensured by the government of Guyana	15.00%

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- Definition

Represents the return on investment ensured by the government of Guyana, in which if the entity's return on investment falls below the ensured percentage, the Government of Guyana is obligated to reimburse any necessary amount.

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- Definition

Represents the amount of spectrum fees paid as full settlement.

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Amount of loss contingency liability.

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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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