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INCOME TAXES - Narrative (Details) - International - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Jul. 31, 2024 | Mar. 31, 2025
Operating Loss Carryforwards [Line Items] |  |
Decrease in unrecognized tax benefits reasonably possible (up to) |  | $ 2.7
Groupon S.r.l. |  |
Operating Loss Carryforwards [Line Items] |  |
Income tax examination, estimate of possible loss | $ 32.2 | $ 123.5
Provisional payments term | 72 months |

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