Name:	lgfa_FilmMonetizedonItsOwnFilmMonetizedinFilmGroupandEntertainmentLicenseAgreementforProgramMaterialAmortizationExpense
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Investment In Films And Television Programs and Program Rights.

No definition available.

Name:	lgfa_InvestmentInFilmsAndTelevisionProgramsandProgramRightsAbstract
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Amount of amortization expense for capitalized cost for right acquired by broadcaster under license agreement for program material.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 920
-SubTopic 350
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=120155617&loc=SL120155632-234783

Name:	us-gaap_EntertainmentLicenseAgreementForProgramMaterialAmortizationExpense
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Amount of amortization expense for capitalized film cost for film predominantly monetized with other films and license agreements.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
-Paragraph 4A
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=120154696&loc=SL120155244-107959

Name:	us-gaap_FilmMonetizedInFilmGroupAmortizationExpense
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Amount of amortization expense for capitalized film cost for film predominantly monetized on its own.