FINANCING ARRANGEMENTS - Revolving Credit Agreement (Details) - USD ($) $ in Millions		1 Months Ended	18 Months Ended	30 Months Ended
	Jan. 22, 2024	Feb. 29, 2024	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Nov. 30, 2023	Mar. 31, 2023	Feb. 28, 2023
Rights Offering
Debt Instrument [Line Items]
Sale of stock, consideration raised	$ 80.0	$ 80.0
Existing Credit Agreement
Debt Instrument [Line Items]
Letters of credit and other cash collateral			$ 32.8	$ 32.8	$ 33.7
Existing Credit Agreement \| Minimum
Debt Instrument [Line Items]
Unused commitment fee percentage				0.25%
Existing Credit Agreement \| Maximum
Debt Instrument [Line Items]
Unused commitment fee percentage				0.35%
Existing Credit Agreement \| LIBOR \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate				0.50%
Existing Credit Agreement \| LIBOR \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate				2.00%
Revolving Credit Facility \| 2023 Fourth Amended Credit Agreement
Debt Instrument [Line Items]
Monthly minimum liquidity balance							$ 50.0
Credit facility maximum borrowing capacity							75.0
Revolving Credit Facility \| 2022 Third Amended Credit Agreement
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity								$ 150.0
Revolving Credit Facility \| Existing Credit Agreement
Debt Instrument [Line Items]
Unused commitment fee percentage				0.40%
Interest rate term, ratio of funded indebtedness to EBITDA				3.00
Percentage of outstanding capital stock, domestic subsidiaries						100.00%
Percentage of outstanding capital stock, first tier foreign subsidiaries						65.00%
Principal amount		42.8
Payoff of interest		0.1
Penalty fees		$ 0.2
Revolving Credit Facility \| Existing Credit Agreement \| SOFR
Debt Instrument [Line Items]
Basis spread on variable rate			0.10%
Revolving Credit Facility \| Existing Credit Agreement \| ABR and Canadian Prime Rate
Debt Instrument [Line Items]
Basis spread on variable rate				1.25%
Revolving Credit Facility \| Existing Credit Agreement \| Fixed Rate
Debt Instrument [Line Items]
Basis spread on variable rate				2.25%
Letter of Credit \| 2023 Fourth Amended Credit Agreement
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity							$ 75.0

Groupon, Inc. 10-K