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Additional Financial Information - Summary of Non Cash Investing Activities (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Cash Flow Supplemental [Line Items] |  |  |
Accrued equity method investment | $ 0.0 | $ 0.0 | $ 19.0

X
- Definition Accrued equity method investment. + References No definition available. + Details
Name: | lgfa_AccruedEquityMethodInvestment
Namespace Prefix: | lgfa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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