Additional Financial Information - Receivables Transferred Under Individual Agreements or Purchases (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Carrying value of receivables transferred and derecognized			$ 512.3	$ 400.5	$ 285.0
Net cash proceeds received			491.9	383.0	278.3
Loss recorded related to transfers of receivables			20.4	17.5	6.7
Third-Party Purchases \| Trade Accounts Receivable
Accumulated Other Comprehensive Income (Loss) [Line Items]
Carrying value of receivables transferred and derecognized	$ 107.4	$ 104.3
Net cash proceeds received	104.1	101.6
Loss recorded related to transfers of receivables	3.3	2.7
Starz Business of Lions Gate Entertainment Corp
Accumulated Other Comprehensive Income (Loss) [Line Items]
Carrying value of receivables transferred and derecognized	206.3	287.1	987.1	1,190.1	1,288.5
Net cash proceeds received from Lionsgate	0.0	49.8	85.5	183.7	172.9
Loss recorded related to transfers of receivables	1.7	2.2	7.5	6.7	2.7
Starz Business of Lions Gate Entertainment Corp \| Third-Party Purchases
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net cash proceeds received	$ 204.6	$ 235.1	$ 894.0	$ 999.7	$ 1,112.9

Cash Flows Between Transferor and Transferee, Net Proceeds (Disbursements)

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Transfer of financial assets accounted for as sales cash proceeds received from related party.

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Transfer of Financial Assets Accounted for as Sales, Amount Derecognized During Period

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Reflects, by transferred financial asset type, the amount of sales proceeds in excess of or deficient from the sum of the carrying amounts of transferred financial assets plus transaction costs, including those transactions in which the seller/transferor has continuing involvement with the financial assets that have been transferred.

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