Debt - Schedule of Total Debt, Excluding Film Related Obligations (Details) - USD ($) $ in Millions	Mar. 31, 2025	Mar. 31, 2024
Debt Instrument [Line Items]
Total corporate debt	$ 1,697.8	$ 1,793.5
Unamortized debt issuance costs	(24.8)	(10.2)
Total debt, net	1,673.0	1,783.3
Less current portion	(215.6)	(860.3)
Non-current portion of debt	1,457.4	923.0
Revolving Credit Facility | Intercompany Revolver(1)
Debt Instrument [Line Items]
Total corporate debt	81.6	0.0
Revolving Credit Facility | LGTV Revolver
Debt Instrument [Line Items]
Total corporate debt	0.0	575.0
Revolving Credit Facility | LGTV Term Loan A
Debt Instrument [Line Items]
Total corporate debt	314.4
Term Loans | LGTV Term Loan A
Debt Instrument [Line Items]
Total corporate debt	314.4	399.3
Term Loans | LGTV Term Loan B
Debt Instrument [Line Items]
Total corporate debt	0.0	819.2
Secured Debt | eOne IP Credit Facility
Debt Instrument [Line Items]
Total corporate debt	323.0	0.0
Secured Debt | LG IP Credit Facility
Debt Instrument [Line Items]
Total corporate debt	$ 978.8	$ 0.0