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Debt - Summary Of Accounting For The Senior Notes redemption (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
Disclosure Of Debt Instrument Redemption And Issuance Transactions [Line Items]
Loss on extinguishment of debt	$ (1.0)	$ 0.0	$ (1.3)	$ (1.3)	$ (3.4)
Starz Business of Lions Gate Entertainment Corp
Disclosure Of Debt Instrument Redemption And Issuance Transactions [Line Items]
Loss on extinguishment of debt	$ (4.9)	$ 21.2	$ 21.2	$ 58.7	(24.8)
Senior Notes redemption and issuance | Starz Business of Lions Gate Entertainment Corp
Disclosure Of Debt Instrument Redemption And Issuance Transactions [Line Items]
Loss on extinguishment of debt					24.8
Recorded as a Reduction of Outstanding Debt Balances & Amortized Over Life of New Issuances					38.1
Total					62.9
New Debt Issuance Costs and Call Premiums | Senior Notes redemption and issuance | Starz Business of Lions Gate Entertainment Corp
Disclosure Of Debt Instrument Redemption And Issuance Transactions [Line Items]
Loss on extinguishment of debt					20.7
Recorded as a Reduction of Outstanding Debt Balances & Amortized Over Life of New Issuances					25.4
Total					46.1
Previously Incurred Debt Issuance Costs | Senior Notes redemption and issuance | Starz Business of Lions Gate Entertainment Corp
Disclosure Of Debt Instrument Redemption And Issuance Transactions [Line Items]
Loss on extinguishment of debt					4.1
Recorded as a Reduction of Outstanding Debt Balances & Amortized Over Life of New Issuances					12.7
Total					$ 16.8

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481303/470-50-40-2

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481303/470-50-40-4

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