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Segment Information - Summary Of General And Administration Of The Company (Parentheticals) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Allocated share based compensation expenses | $ 8.4 | $ 8.0 | $ 62.5 | $ 73.4 | $ 70.2
Allocation of Corporate and Shared Employee Share Based Compensation |  |  |  |  |
Allocated share based compensation expenses |  |  | 15.0 | 26.7 | 19.6
Starz Business of Lions Gate Entertainment Corp |  |  |  |  |
Allocated share based compensation expenses | 5.2 | 4.0 | 24.6 | 25.7 | 28.0
Starz Business of Lions Gate Entertainment Corp | Allocation Of Lions Gate Corporate And Shared Employees Share Based Compensation |  |  |  |  |
Allocated share based compensation expenses | $ 0.7 | $ 1.4 | $ 5.6 | $ 9.7 | $ 7.8

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