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INCOME TAXES - Narrative (Details) - International - USD ($) $ in Millions	1 Months Ended		3 Months Ended
	Feb. 29, 2024	Dec. 31, 2023	Mar. 31, 2024	Apr. 09, 2024
Income Taxes [Line Items]
Proposed assessment for claims			$ 119.3
Income tax examination, estimate of possible loss	$ 31.6	$ 79.8
Decrease in unrecognized tax benefits reasonably possible (up to)			$ 4.2
Groupon S.r.l. | Subsequent Event
Income Taxes [Line Items]
Income tax, appeal bond				$ 27.6
Appeal bond, amount due				$ 52.2

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Estimated amount of loss resulting from an adverse tax position.

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