Investment in Films and Television Programs - Schedule of Impairments by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Write downs on investments in films and television programs	$ 33.6	$ 55.8	$ 10.8
Film, Monetized on Its Own, and Film Group, Impairment, Statement of Income [Extensible Enumeration]	Total direct operating expense on consolidated statements of operations, Restructuring and other	Total direct operating expense on consolidated statements of operations, Restructuring and other
Reportable Segments | Motion Picture
Segment Reporting Information [Line Items]
Write downs on investments in films and television programs	$ 19.7	$ 34.6	6.2
Reportable Segments | Television Production
Segment Reporting Information [Line Items]
Write downs on investments in films and television programs	6.7	8.4	4.6
Corporate
Segment Reporting Information [Line Items]
Write downs on investments in films and television programs	$ 7.2	$ 12.8	$ 0.0