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Segment Information - Schedule of Adjusted Share-Based Compensation (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
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |
Total share-based compensation expense |  | $ 12.6 | $ 12.2 | $ 62.5 | [1] | $ 73.4 | [1] | $ 70.2 | [1]
Amount included in restructuring and other |  | 0.0 | (0.5) | (7.7) | [2] | (4.2) | [2] | 0.0 | [2]
Adjusted share-based compensation |  | 12.6 | 11.7 | 54.8 |  | 69.2 |  | 70.2 |
Corporate and reconciling items | Restructuring and other |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |
Amount included in restructuring and other |  | $ 0.0 | $ (0.5) |  |  |  |  |  |
Starz Business of Lions Gate Entertainment Corp |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |
Total share-based compensation expense |  |  |  | 24.6 |  | 25.7 |  | 28.0 |
Amount included in restructuring and other | [2] |  |  | (1.4) |  | 0.0 |  | 0.0 |
Adjusted share-based compensation |  |  |  | $ 23.2 |  | $ 25.7 |  | $ 28.0 |
[1] | Total share-based compensation expense in the years ended March 31, 2024, 2023 and 2022 includes $15.0 million, $26.7 million and $19.6 million, respectively, of corporate allocation of share-based compensation expense, representing the allocation of Lionsgate’s corporate employee share-based compensation expense.
[2] | Represents share-based compensation expense included in restructuring and other expenses reflecting the impact of the acceleration of vesting schedules for equity awards pursuant to certain severance arrangements.

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