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Restructuring and Other - Summary of Changes in the Restructuring and Other Severance Liability (Parenthetical) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Severance Liability |  |  |  |  |  |  |  | $ 19.3 |  |  |  |  |
Impact of accelerated vesting on equity awards |  | $ 0.0 | $ 6.8 | $ 4.7 |  | $ 7.3 |  | 7.7 | [1] | $ 4.2 | [1] | $ 0.0 | [1]
Accounts Payable and Accrued Liabilities | Employee Severance |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining severance liability, expected to be paid in next 12 months |  | $ 23.2 |  | 23.2 |  |  |  |  |  |  |  |  |
Starz Business of Lions Gate Entertainment Corp |  |  |  |  |  |  |  |  |  |  |  |  |
Severance Liability |  |  |  | 1.5 |  |  |  | 1.6 |  |  |  |  |
Impact of accelerated vesting on equity awards | [1] |  |  | $ 0.3 | [2] | $ 0.9 | [2] | $ 1.4 |  | $ 0.0 |  | $ 0.0 |
[1] | 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.
[2] | Represents the impact of the acceleration of vesting schedules for equity awards pursuant to certain severance arrangements.

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- Definition Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4.b.2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 + Details
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