Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

v3.19.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2019
Apr. 30, 2019
Document Information [Line Items]    
Entity Registrant Name GCI LIBERTY, INC.  
Entity Central Index Key 0000808461  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Mar. 31, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Emerging Growth Company false  
Entity Small Business false  
Series A common stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   101,078,857
Series B common stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   4,441,109