Segment Information - Schedule of Reportable Segment Revenues Cost of Revenues and Selling General and Administrative Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues
Revenues	$ 105.5	$ 86.0	$ 253.2	$ 219.4
Cost of revenues
Cost of revenues	40.6	33.1	92.0	80.6
Selling, general and administrative expenses
Selling, general and administrative expense	47.1	39.5	101.2	95.0
Connections Segment [Member]
Revenues
Revenues	95.4	75.0	233.7	198.4
Cost of revenues
Cost of revenues	38.1	30.2	86.9	75.5
Selling, general and administrative expenses
Selling, general and administrative expense	22.1	18.4	45.5	41.3
All Other Category [Member]
Revenues
Revenues	10.1	11.0	19.5	21.0
Cost of revenues
Cost of revenues	2.5	2.4	5.1	4.6
Selling, general and administrative expenses
Selling, general and administrative expense	5.8	6.8	11.9	14.3
Corporate [Member]
Selling, general and administrative expenses
Selling, general and administrative expense	12.6	12.9	25.8	28.6
Other Items [Member]
Cost of revenues
Cost of revenues	0.0	0.5	0.0	0.5
Selling, general and administrative expenses
Selling, general and administrative expense	$ 6.6	$ 1.4	$ 18.0	$ 10.8

Emerald Holding, Inc. 10-Q