Document and Entity Information (USD $) In Billions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Jun. 30, 2014	Feb. 06, 2015
Document and Entity Information [Line Items]
Entity Registrant Name	Liberty Global plc
Entity Central Index Key	0001570585
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float		$ 32.5
Class A Ordinary Shares [Member]
Document and Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)			251,290,944
Class B Ordinary Shares [Member]
Document and Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)			10,139,184
Class C Ordinary Shares [Member]
Document and Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)			625,736,759