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Segment Information - Schedule of Adjusted Depreciation and Amortization (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended				12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024		Dec. 31, 2023		Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Allocated share based compensation expenses	$ 14.3	$ 12.7	$ 31.4		$ 34.2		$ 62.5	$ 73.4	$ 70.2
Share-based compensation			46.9		53.6		62.5	73.4	70.2
Starz Business of Lions Gate Entertainment Corp
Allocated share based compensation expenses			13.7	[1]	20.3	[1]	24.6	25.7	28.0
Share-based compensation			13.7		20.3		24.6	25.7	28.0
Starz Business of Lions Gate Entertainment Corp | Lions Gate Corporate Employee Share Based Compensation
Allocated share based compensation expenses							$ 5.6	$ 9.7	$ 7.8
Share-based compensation			$ 0.7		$ 4.5
[1] Included in net earnings (loss) from discontinued operations for the nine months ended December 31, 2024 was share-based compensation expense of $0.3 million (2023 — $1.4 million).

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
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-Topic 718
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-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
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Amount of noncash expense for share-based payment arrangement.

+ References

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