Capital Stock - Narrative - Equity (Details) - Lions Gate Entertainment Corp. - shares shares in Millions	Mar. 31, 2025	Mar. 31, 2024
Old Lions Gate Class A Voting Shares
Class of Stock [Line Items]
Authorized common shares (in shares)	500.0	500.0
Old Lions Gate Class B Non-Voting Shares
Class of Stock [Line Items]
Authorized common shares (in shares)	500.0	500.0