Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 588.4	$ 625.0
Motion Picture
Disaggregation of Revenue [Line Items]
Revenue	347.3	406.5
Television Production
Disaggregation of Revenue [Line Items]
Revenue	241.1	218.5
Operating segments | Motion Picture
Disaggregation of Revenue [Line Items]
Revenue	347.3	406.5
Operating segments | Motion Picture | Starz Business
Disaggregation of Revenue [Line Items]
Revenue	64.2	16.5
Operating segments | Motion Picture | Theatrical
Disaggregation of Revenue [Line Items]
Revenue	36.0	65.9
Operating segments | Motion Picture | Total Home Entertainment
Disaggregation of Revenue [Line Items]
Revenue	149.3	200.0
Operating segments | Motion Picture | Digital Media
Disaggregation of Revenue [Line Items]
Revenue	140.1	174.1
Operating segments | Motion Picture | Packaged Media
Disaggregation of Revenue [Line Items]
Revenue	9.2	25.9
Operating segments | Motion Picture | Television
Disaggregation of Revenue [Line Items]
Revenue	88.0	48.5
Operating segments | Motion Picture | International
Disaggregation of Revenue [Line Items]
Revenue	68.3	81.0
Operating segments | Motion Picture | Other
Disaggregation of Revenue [Line Items]
Revenue	5.7	11.1
Operating segments | Television Production
Disaggregation of Revenue [Line Items]
Revenue	241.1	218.5
Operating segments | Television Production | Starz Business
Disaggregation of Revenue [Line Items]
Revenue	39.6	81.0
Operating segments | Television Production | Total Home Entertainment
Disaggregation of Revenue [Line Items]
Revenue	19.8	12.2
Operating segments | Television Production | Digital Media
Disaggregation of Revenue [Line Items]
Revenue	18.9	11.8
Operating segments | Television Production | Packaged Media
Disaggregation of Revenue [Line Items]
Revenue	0.9	0.4
Operating segments | Television Production | Television
Disaggregation of Revenue [Line Items]
Revenue	160.2	150.0
Operating segments | Television Production | International
Disaggregation of Revenue [Line Items]
Revenue	35.5	31.9
Operating segments | Television Production | Other
Disaggregation of Revenue [Line Items]
Revenue	$ 25.6	$ 24.4