Liberty Broadband (LBRDK) 8-K 16 Mar 21 Liberty Broadband Corporation Declares Quarterly Cash Dividend Financial data

Document and Entity Information

Document and Entity Information	Mar. 15, 2021
Document Information [Line Items]
Document Type	8-K
Document Period End Date	Mar. 15, 2021
Entity Registrant Name	LIBERTY BROADBAND CORPORATION
Entity Incorporation, State or Country Code	DE
Entity File Number	001-36713
Entity Tax Identification Number	47-1211994
Entity Address, Address Line One	12300 Liberty Blvd.
Entity Address, City or Town	Englewood
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80112
City Area Code	720
Local Phone Number	875-5700
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	0001611983
Amendment Flag	false
Common Class A
Document Information [Line Items]
Title of 12(b) Security	Series A common stock
Trading Symbol	LBRDA
Security Exchange Name	NASDAQ
Common Class C
Document Information [Line Items]
Title of 12(b) Security	Series C common stock
Trading Symbol	LBRDK
Security Exchange Name	NASDAQ
Preferred Class A
Document Information [Line Items]
Title of 12(b) Security	Series A Cumulative Redeemable preferred stock
Trading Symbol	LBRDP
Security Exchange Name	NASDAQ