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Schedule I - Condensed Financial Information of Registrant Condensed Statements of (Loss) Income and Comprehensive (Loss) Income (Detail) - USD ($) $ in Millions |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 31, 2024 | Oct. 31, 2023 | Oct. 31, 2022 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Condensed Income Statements Captions [Line Items] |  |  |  |  |  |
Revenues |  |  |  | $ 398.8 | $ 382.8 | $ 325.9
Selling, general and administrative expense |  |  |  | 170.4 | 168.3 | 145.0
Depreciation and amortization expense |  |  |  | 28.3 | 45.0 | 59.5
Goodwill impairment charge | $ 0.0 | $ 0.0 | $ 0.0 | 0.0 | 0.0 | 6.3
Intangible asset impairment charge |  |  |  | 7.3 | 0.0 | 1.6
Operating income |  |  |  | 46.8 | 34.7 | 179.8
Interest expense |  |  |  | 47.8 | 43.3 | 24.5
Interest income |  |  |  | 8.5 | 8.2 | 2.7
Loss on disposal of fixed assets |  |  |  | 0.0 | (0.2) | 0.0
Income (loss) before income taxes |  |  |  | 7.5 | (2.9) | 158.0
Provision for income taxes |  |  |  | 5.3 | 5.3 | 27.2
Accretion to redemption value of redeemable convertible preferred stock |  |  |  | (12.7) | (42.0) | (38.8)
Participation rights on if-converted basis |  |  |  | 0.0 | 0.0 | (60.2)
Net income (loss) and comprehensive income (loss) attributable to Emerald Holding, Inc. |  |  |  | 2.2 | (8.2) | 130.8
Parent Company [Member] |  |  |  |  |  |
Condensed Income Statements Captions [Line Items] |  |  |  |  |  |
Equity in net income (losses) and comprehensive income (losses) of subsidiaries |  |  |  | 2.2 | (8.2) | 130.8
Accretion to redemption value of redeemable convertible preferred stock |  |  |  | (12.7) | (42.0) | (38.8)
Participation rights on if-converted basis |  |  |  |  |  | (60.2)
Net income (loss) and comprehensive income (loss) attributable to Emerald Holding, Inc. |  |  |  | $ (10.5) | $ (50.2) | $ 31.8

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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
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- Definition Amount of decrease to net income for accretion of temporary equity to its redemption value to derive net income apportioned to common stockholders. + References No definition available. + Details
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