Debt - Schedule of Total Debt, Excluding Film Related Obligations (Details) - USD ($) $ in Millions	Dec. 31, 2024	Mar. 31, 2024
Debt Instrument [Line Items]
Total corporate debt	$ 2,020.3	$ 1,793.5
Unamortized debt issuance costs	(24.1)	(10.2)
Total debt, net	1,996.2	1,783.3
Less current portion	(253.4)	(860.3)
Non-current portion of debt	1,742.8	923.0
Revolving Credit Facility \| Intercompany Revolver
Debt Instrument [Line Items]
Total corporate debt	134.4	0.0
Revolving Credit Facility \| LGTV Revolver
Debt Instrument [Line Items]
Total corporate debt	390.0	575.0
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	331.5	0.0
Secured Debt \| LG IP Credit Facility
Debt Instrument [Line Items]
Total corporate debt	$ 850.0	$ 0.0

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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