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Segment Information - Schedule of Adjusted Depreciation and Amortization (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] |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  | $ 15.6 | $ 17.9 | $ 18.1
Less: Amount included in purchase accounting and related adjustments |  |  |  |  | (5.1) | (5.7) | (5.7)
Adjusted depreciation and amortization | $ 3.2 | $ 2.4 | $ 6.7 | $ 5.2 | 10.5 | 12.2 | 12.4
Depreciation and amortization | 4.2 | 3.8 | 8.8 | 8.0 | 15.6 | 17.9 | 18.1
Corporate and Reconciling Items |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |
Adjusted depreciation and amortization | 3.2 | 2.4 | 6.7 | 5.2 |  |  |
Purchase Accounting and Related Adjustments | Corporate and Reconciling Items |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |
Depreciation and amortization | $ (1.0) | $ (1.4) | (2.1) | (2.8) |  |  |
Starz Business of Lions Gate Entertainment Corp |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |
Depreciation and amortization |  |  | 82.8 | 77.9 | 161.8 | 155.7 | 152.6
Less: Amount included in purchase accounting and related adjustments |  |  | (72.9) | (66.3) | (137.0) | (134.4) | (129.3)
Adjusted depreciation and amortization |  |  | 9.9 | 11.6 | 24.8 | 21.3 | 23.3
Depreciation and amortization |  |  | $ 82.8 | $ 77.9 | $ 161.8 | $ 155.7 | $ 152.6

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