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Document and Entity Information Document - USD ($)
 12 Months Ended
Sep. 30, 2018
Jul. 31, 2018
Mar. 25, 2018
Entity Information [Line Items]      
Entity Registrant Name Lee Enterprises, Inc.    
Entity Central Index Key 0000058361    
Current Fiscal Year End Date --09-30    
Entity Filer Category Accelerated Filer    
Document Type 10-K    
Document Period End Date Sep. 30, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   57,148,888  
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 102,433,453