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Additional Financial Information - Summary of the Receivables Transferred Under the Pooled Monetization Agreement (Parenthetical) (Details) - USD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Accounts Receivables Transferred Under Agreement [Line Items] |  |  |
Receivables Repurchased during the Period | $ 46.0 | $ 27.4 | $ 25.5

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- References No definition available. + Details
Name: | lgfa_AccountsReceivablesTransferredUnderAgreementLineItems
Namespace Prefix: | lgfa_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Receivables repurchased during the period. + References No definition available. + Details
Name: | lgfa_ReceivablesRepurchasedDuringThePeriod
Namespace Prefix: | lgfa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration