Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.3.1.900
Document and Entity Information - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2015
Jan. 31, 2016
Jun. 30, 2015
Entity Registrant Name Liberty Broadband Corp    
Entity Central Index Key 0001611983    
Document Type 10-K    
Document Period End Date Dec. 31, 2015    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 4.7
Document Fiscal Year Focus 2015    
Document Fiscal Period Focus FY    
Class A common stock      
Entity Common Stock, Shares Outstanding   26,176,694  
Class B common stock      
Entity Common Stock, Shares Outstanding   2,467,547  
Class C common stock      
Entity Common Stock, Shares Outstanding   74,672,640