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Segment Information - Summary Of Reconciles Total Share Based Compensation Expense (Parentheticals) (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Total share-based compensation expense | $ 46.9 | $ 53.6 | $ 62.5 | $ 73.4 | $ 70.2
LIONSGATE STUDIOS CORP. |  |  |  |  |
Total share-based compensation expense |  |  | $ 15.0 | $ 26.7 | $ 19.6

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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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