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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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