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Acquisitions (Narrative) (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2023 | Dec. 27, 2023 | Mar. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Business Acquisition [Line Items] |  |  |  |  |  |
Cash paid for acquisition of eOne, net of cash acquired |  |  |  |  | $ 331.1 | $ 0.0
Cash acquired |  | $ 54.1 |  |  |  |
Forecast |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Proceeds from reverse recapitalization transaction |  |  | $ 350.0 |  |  |
Proceeds from private investments in public equities |  |  | $ 175.0 |  |  |
Forecast | Studio Business |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Ownership percentage, parent |  |  | 87.30% |  |  |
Screaming Eagle | Forecast | Studio Business |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Ownership percentage by noncontrolling owners |  |  | 12.70% |  |  |
eOne |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Purchase price |  | 375.0 |  |  |  |
Cash paid for acquisition of eOne, net of cash acquired |  | 331.0 |  |  |  |
Cash acquired |  | $ 54.1 |  |  |  |
Revenue since acquisition date | $ 0.0 |  |  |  |  |
Net income since acquisition date | $ 0.0 |  |  |  |  |
Acquisition related costs |  |  |  | $ 5.6 | 8.8 |
Pro forma impairment of goodwill and trade name at eOne |  |  |  |  | $ 296.2 |
eOne | Film and Television Library | Minimum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  | 5 years |  |  |  |
eOne | Film and Television Library | Maximum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  | 10 years |  |  |  |
eOne | Trade Names |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  | 5 years |  |  |  |

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