Segment Information - Capital Expenditures (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting, Other Significant Reconciling Item [Line Items]
Capital expenditures	$ 13.5	$ 9.9	$ 6.5
Lions Gate Entertainment Corp.
Segment Reporting, Other Significant Reconciling Item [Line Items]
Capital expenditures	31.1	34.7	49.0
Reportable Segments | Television Production
Segment Reporting, Other Significant Reconciling Item [Line Items]
Capital expenditures	0.3	0.3	0.3
Reportable Segments | Television Production | Lions Gate Entertainment Corp.
Segment Reporting, Other Significant Reconciling Item [Line Items]
Capital expenditures	0.3	0.3	0.3
Reportable Segments | Motion Picture
Segment Reporting, Other Significant Reconciling Item [Line Items]
Capital expenditures	0.0	0.0	0.0
Reportable Segments | Motion Picture | Lions Gate Entertainment Corp.
Segment Reporting, Other Significant Reconciling Item [Line Items]
Capital expenditures	0.0	0.0	0.0
Corporate
Segment Reporting, Other Significant Reconciling Item [Line Items]
Capital expenditures	13.2	9.6	6.2
Corporate | Lions Gate Entertainment Corp.
Segment Reporting, Other Significant Reconciling Item [Line Items]
Capital expenditures	$ 13.2	$ 9.6	$ 6.2