Investment In Films And Television Programs (Narrative) (Details)	9 Months Ended
Dec. 31, 2012
Investment In Films And Television Programs [Abstract]
Percentage of unamortized film costs, one year	46.00%
Percentage of unamortized film costs, three years	81.00%

The percentage of unamortized film costs for released films and television programs, net of accumulated amortization and excluding acquired film libraries, that it expects to amortize within three years from the date of the balance sheet.

No definition available.

Name:	lgf_ExpectedPercentageOfCompletedFilmsAndTelevisionProgramsExcludingAcquiredLibraryNetOfAccumulatedAmortizationAmortizedDuringThreeYearPeriod
Namespace Prefix:	lgf_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration