XML 10 R45.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Investment In Films and Television Programs and Program Rights (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018
Investment In Films And Television Programs and Program Rights [Abstract] |  |  |  |
Fair value film write-downs | $ 37.2 | $ 10.5 | $ 38.8 | $ 17.4

X
- Definition Fair value film write-downs recorded during the period. + References No definition available. + Details
Name: | lgfa_FairValueFilmWriteDowns
Namespace Prefix: | lgfa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Investment In Films And Television Programs and Program Rights. + References No definition available. + Details
Name: | lgfa_InvestmentInFilmsAndTelevisionProgramsandProgramRightsAbstract
Namespace Prefix: | lgfa_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration