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Intangible Assets (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2024 | Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Impairment of assets |  | $ 31.2 | $ 31.2 | $ 5.6 |
Impairment, intangible asset, statement of income or comprehensive income |  | Asset impairment charges |  |  |
Aggregate impairment loss |  | $ 42.3 | 42.3 |  |
Indefinite-lived intangible assets |  |  |  |  | $ 5.4
Impairment of indefinite-lived intangible assets |  |  |  | $ 5.6 |
Impairment, intangible asset, indefinite-lived (excluding goodwill), statement of income or comprehensive income |  |  |  | Goodwill and Intangible Asset Impairment |
Impairment, intangible asset, finite-lived (excluding goodwill), statement of income or comprehensive income |  |  |  | Asset impairment charges |
Amortization expense |  |  | 12.7 | $ 12.1 | $ 15.5
Amortization expense for intangible assets, 2025 | $ 1.8 |  | 1.8 |  |
Amortization expense for intangible assets, 2026 | 1.7 |  | 1.7 |  |
Amortization expense for intangible assets, 2027 | 1.7 |  | 1.7 |  |
Amortization expense for intangible assets, 2028 | 1.6 |  | 1.6 |  |
Amortization expense for intangible assets, 2029 | 1.5 |  | 1.5 |  |
Customer relationships |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Impairment of assets |  |  | 0.9 |  |
Acquired technology |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Impairment of assets | $ 1.2 |  | 23.2 |  |
Finite lives impairment charge |  |  |  | 13.6 |
Acquired intangible assets |  |  |  | 0.0 |
Trade names |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Impairment of assets |  |  | $ 8.3 |  |
Finite lives impairment charge |  |  |  | $ 3.8 |

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