XML 20 R1.htm IDEA: XBRL DOCUMENT v3.19.1
Document and Entity Information - USD ($)
 12 Months Ended
Mar. 31, 2019
May 20, 2019
Sep. 30, 2018
Document Information [Line Items]      
Entity Registrant Name LIONS GATE ENTERTAINMENT CORP /CN/    
Entity Central Index Key 0000929351    
Document Type 10-K    
Document Period End Date Mar. 31, 2019    
Amendment Flag false    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --03-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Emerging Growth Company false    
Entity Small Business false    
Entity Shell Company false    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 4,255,846,171
Class A Voting Common Shares      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   82,605,121  
Class B Non-Voting Common Shares      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   133,601,545