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Related Party Transactions - Narrative (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
May 13, 2024 | Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
Related Party Transaction [Line Items] |  |  |  |
Due from LG Studios Business (Note 17) |  | $ 81,600,000 | $ 0 |
General and administration |  | 101,800,000 | 129,200,000 | $ 124,000,000.0
Segment Reporting, Reconciling Item, Corporate Nonsegment | Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
General and administration |  | 2,300,000 | $ 25,600,000 | $ 21,900,000
Business separation cost |  | 10,000,000 |  |
Intercompany Revolver | Revolving Credit Facility |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Debt maximum covenant amount | $ 150,000,000.0 |  |  |
Debt instrument, basis spread on variable rate | 1.75% |  |  |
Intercompany Revolver | Revolving Credit Facility | Related Party |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Due from LG Studios Business (Note 17) |  | $ 81,600,000 |  |

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