SCHEDULE I (Parent Company Information) (CONDENSED BALANCE SHEET (Parenthetical) (Details) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Liberty Global Group [Member] | Class A Ordinary Shares
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	253,827,604	252,766,455
Common stock, outstanding (in shares)	253,827,604	252,766,455
Liberty Global Group [Member] | Class B Ordinary Shares
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	10,805,850	10,472,517
Common stock, outstanding (in shares)	10,805,850	10,472,517
Liberty Global Group [Member] | Class C Ordinary Shares
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	634,391,072	584,044,394
Common stock, outstanding (in shares)	634,391,072	584,044,394
LiLAC Group [Member] | Class A Ordinary Shares
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	50,317,930	12,630,580
Common stock, outstanding (in shares)	50,317,930	12,630,580
LiLAC Group [Member] | Class B Ordinary Shares
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	1,888,323	523,423
Common stock, outstanding (in shares)	1,888,323	523,423
LiLAC Group [Member] | Class C Ordinary Shares
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	120,889,034	30,772,874
Common stock, outstanding (in shares)	120,889,034	30,772,874
Liberty Global Plc | Liberty Global Group [Member] | Class A Ordinary Shares
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	253,827,604	252,766,455
Common stock, outstanding (in shares)	253,827,604	252,766,455
Liberty Global Plc | Liberty Global Group [Member] | Class B Ordinary Shares
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	10,805,850	10,472,517
Common stock, outstanding (in shares)	10,805,850	10,472,517
Liberty Global Plc | Liberty Global Group [Member] | Class C Ordinary Shares
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	634,391,072	584,044,394
Common stock, outstanding (in shares)	634,391,072	584,044,394
Liberty Global Plc | LiLAC Group [Member] | Class A Ordinary Shares
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	50,317,930	12,630,580
Common stock, outstanding (in shares)	50,317,930	12,630,580
Liberty Global Plc | LiLAC Group [Member] | Class B Ordinary Shares
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	1,888,323	523,423
Common stock, outstanding (in shares)	1,888,323	523,423
Liberty Global Plc | LiLAC Group [Member] | Class C Ordinary Shares
Condensed Financial Statements, Captions [Line Items]
Common stock, nominal value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued (in shares)	120,889,034	30,772,874
Common stock, outstanding (in shares)	120,889,034	30,772,874