Investment in Films and Television Programs and Licensed Program Rights - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Acquired film and television libraries, unamortized costs	$ 235.7	$ 223.1
Lions Gate Entertainment Corp.
Segment Reporting Information [Line Items]
Acquired film and television libraries, unamortized costs	$ 235.7	$ 223.1
Acquired libraries, remaining amortization period	13 years 3 months 18 days