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Participations and Residuals (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Mar. 31, 2015
Participations And Residuals [abstract]  
Percentage of accrued participations and residuals payable within one year 58.00%lgf_PercentageOfAccruedParticipationsAndResidualsPayableWithinOneYear
Contribution of TIK Films, in general, subject to certain limitations 25.00%lgf_TheatricalSlateParticipationArrangementPercentageContribution
Theatrical slate participation arrangement, length of term ending January 23, 2018 3 years
Theatrical slate participation arrangement, amount payable to TIK Films $ 13.6lgf_TheatricalSlateParticipationArrangementAmountPayable