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Acquisitions - Schedule of Pro Forma Statement of Operations Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023
Business Acquisition [Line Items] |  |  |  |
Revenues |  |  | $ 3,380.0 | $ 3,911.6
Net income (loss) attributable to Lionsgate Studios Corp. |  |  | $ (376.5) | $ 63.4
eOne |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Revenues | $ 832.5 | $ 2,525.6 |  |
Net income (loss) attributable to Lionsgate Studios Corp. | $ (21.2) | $ (323.7) |  |

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