Segment Information - Schedule of Reconciliation of Total Segment Assets to Total Consolidated Assets (Details) - USD ($) $ in Millions	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 5,115.2	$ 5,103.0
Operating Segments | Motion Picture
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,867.4	1,851.4
Operating Segments | Television Production
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,279.3	2,347.8
Operating Segments | Other unallocated assets
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	968.5	903.8
Other Unallocated Assets
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 5,115.2	$ 5,103.0