| Cover Page | Aug. 06, 2020 |
| Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Aug. 6, 2020 |
| Entity Registrant Name | LIONS GATE ENTERTAINMENT CORP /CN/ |
| Entity Incorporation, State or Country Code | A1 |
| Entity File Number | 1-14880 |
| Entity Address, Address Line One | 250 Howe Street |
| Entity Address, Address Line Two | 20th Floor |
| Entity Address, City or Town | Vancouver |
| Entity Address, State or Province | BC |
| Entity Address, Postal Zip Code | V6C 3R8 |
| City Area Code | 877 |
| Local Phone Number | 848-3866 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000929351 |
| Amendment Flag | false |
| Common Class A | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Class A Voting Common Shares, no par value per share |
| Trading Symbol | LGF.A |
| Security Exchange Name | NYSE |
| Common Class B | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Class B Non-Voting Common Shares, no par value per share |
| Trading Symbol | LGF.B |
| Security Exchange Name | NYSE |
| Principal Executive Offices | |
| Entity Information [Line Items] | |
| Entity Address, Address Line One | 2700 Colorado Avenue |
| Entity Address, City or Town | Santa Monica |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 90404 |
