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Related Party Transactions - Schedule of Net Transfers (Parenthetical) (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
Related Party
Related Party Transaction [Line Items]
Transfers to parent, net	$ 35.0
Starz Business of Lions Gate Entertainment Corp
Related Party Transaction [Line Items]
Transfer from parent net cash flows provided by financing activities	2.7	$ 76.1	$ 146.7	$ 228.0	$ 171.1
Transfer to parent company aggregate share based compensation discontinued operations	0.3	$ 0.3	$ 1.8	$ 3.0	$ 1.9
Starz Business of Lions Gate Entertainment Corp | Related Party
Related Party Transaction [Line Items]
Transfers to parent, net	$ 35.0

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(ii))
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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