Segment Information - Schedule of Reconciliation of Total Assets By Segment to Consolidated Assets (Details) - USD ($) $ in Millions	Jun. 30, 2025	Mar. 31, 2025
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 5,160.9	$ 6,822.1
Operating segments \| Motion Picture
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,092.6	1,867.4
Operating segments \| Television Production
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,364.6	2,279.3
Operating segments \| Other unallocated assets
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	703.7	776.0
Operating segments \| Assets of discontinued operations
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	0.0	1,899.4
Other unallocated assets
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 5,160.9	$ 6,822.1

Amount of asset recognized for present right to economic benefit.

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+ Details