Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Jul. 29, 2015
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-Q
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Amendment Flag	false
Liberty Global Group [Member] | Class A Ordinary Shares [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		252,508,015
Liberty Global Group [Member] | Class B Ordinary Shares [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		10,472,517
Liberty Global Group [Member] | Class C Ordinary Shares [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		611,655,865
LiLAC Group [Member] | Class A Ordinary Shares [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		12,625,362
LiLAC Group [Member] | Class B Ordinary Shares [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		523,626
LiLAC Group [Member] | Class C Ordinary Shares [Member]
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		30,776,883