Document and Entity Information - shares	6 Months Ended
Sep. 30, 2018	Nov. 05, 2018
Document Information [Line Items]
Entity Registrant Name	LIONS GATE ENTERTAINMENT CORP /CN/
Entity Central Index Key	0000929351
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Class A Voting Shares
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		82,068,047
Class B Non-Voting Shares
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		132,351,596

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End date of current fiscal year in the format --MM-DD.

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This is focus fiscal period of the document report. For a first quarter 2006 quarterly report, which may also provide financial information from prior periods, the first fiscal quarter should be given as the fiscal period focus. Values: FY, Q1, Q2, Q3, Q4, H1, H2, M9, T1, T2, T3, M8, CY.

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This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.

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The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.

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The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word "Other".

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