Description of Business, Basis of Presentation and Significant Accounting Policies - Anti-dilutive Shares Issuable (Details) - shares shares in Millions	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Lions Gate Entertainment Corp.
Anti-dilutive shares issuable [Line Items]
Anti-dilutive shares issuable (in shares)	24.0	23.2	28.7
Equity Unit Purchase Agreements
Anti-dilutive shares issuable [Line Items]
Anti-dilutive shares issuable (in shares)	2.2	0.0	0.0
Equity Unit Purchase Agreements | Lions Gate Entertainment Corp.
Anti-dilutive shares issuable [Line Items]
Anti-dilutive shares issuable (in shares)	16.8	17.1	23.0
Restricted share units | Lions Gate Entertainment Corp.
Anti-dilutive shares issuable [Line Items]
Anti-dilutive shares issuable (in shares)	3.0	1.9	2.2
Other issuable shares | Lions Gate Entertainment Corp.
Anti-dilutive shares issuable [Line Items]
Anti-dilutive shares issuable (in shares)	4.2	4.2	3.5