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Segment Information - Schedule of Adjusted Share-Based Compensation (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 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 | [1] |  |  |  |  |  |  | $ 62.5 |  | $ 73.4 |  | $ 70.2 |
Amount included in restructuring and other |  | $ (4.6) | $ 0.0 | $ (4.6) |  | $ (0.5) |  | (7.7) | [2] | (4.2) | [2] | 0.0 | [2]
Adjusted share-based compensation |  |  |  |  |  |  |  | 54.8 |  | 69.2 |  | 70.2 |
Total share-based compensation expense |  | 19.9 | 17.4 | 32.5 |  | 29.5 |  |  |  |  |  |  |
Adjusted share-based compensation |  | 15.3 | 17.4 | 27.9 |  | 29.0 |  | 54.8 | [3] | 69.2 | [3] | 70.2 | [3]
Restructuring and other |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total share-based compensation expense |  | 4.6 | 0.0 | 4.6 |  | 0.5 |  |  |  |  |  |  |
Corporate and Reconciling Items |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted share-based compensation |  | $ 15.3 | $ 17.4 | 27.9 |  | 29.0 |  |  |  |  |  |  |
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 |  |  |  | (4.6) |  |  |  |  |  |  |  |  |
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 |  |  |  | 9.6 |  | 13.0 |  | 24.6 |  | 25.7 |  | 28.0 |
Amount included in restructuring and other | [2] |  |  | (0.3) | [4] | (0.9) | [4] | (1.4) |  | 0.0 |  | 0.0 |
Adjusted share-based compensation |  |  |  | 9.3 |  | 12.1 |  | 23.2 |  | 25.7 |  | 28.0 |
Adjusted share-based compensation |  |  |  | $ 9.3 |  | $ 12.1 |  | $ 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.
[3] | The following table reconciles total share-based compensation expense to adjusted share-based compensation expense:
[4] | Represents the impact of the acceleration of vesting schedules for equity awards pursuant to certain severance arrangements.

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