Acquisitions (Virgin Media) (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended						0 Months Ended	7 Months Ended			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jun. 07, 2013	Jun. 07, 2013 Options [Member]	Jun. 07, 2013 Restricted Stock Units (RSUs) [Member]	Jun. 07, 2013 Virgin Media Acquisition [Member]	Dec. 31, 2013 Virgin Media Acquisition [Member] VM Convertible Notes [Member]	Dec. 31, 2013 Virgin Media Acquisition [Member] Capacity Arrangement Contract [Member]	Jun. 07, 2013 Virgin Media Acquisition [Member] Capacity Arrangement Contract [Member]	Dec. 31, 2013 Merger Agreement Creating Ultimate Parent Company [Member] VM Senior Notes [Member]	Dec. 31, 2013 Class A Ordinary Shares [Member] vote	Dec. 31, 2013 Class B Ordinary Shares [Member] vote	Dec. 31, 2013 Class C Ordinary Shares [Member]	Dec. 31, 2012 Series A Common Stock [Member]	Dec. 31, 2012 Series B Common Stock [Member]	Dec. 31, 2012 Series C Common Stock [Member]	Jun. 07, 2013 Virgin Media [Member] Merger Agreement Creating Ultimate Parent Company [Member]	Jun. 07, 2013 Virgin Media [Member] Class A Ordinary Shares [Member]	Jun. 07, 2013 Virgin Media [Member] Class A Ordinary Shares [Member] Merger Agreement Creating Ultimate Parent Company [Member]	Jun. 07, 2013 Virgin Media [Member] Class C Ordinary Shares [Member]	Jun. 07, 2013 Virgin Media [Member] Class C Ordinary Shares [Member] Merger Agreement Creating Ultimate Parent Company [Member]	Jun. 07, 2013 Virgin Media [Member] Common Stock [Member]	Jun. 07, 2013 Liberty Global plc [Member] Class A Ordinary Shares [Member]	Jun. 07, 2013 Liberty Global plc [Member] Class A Ordinary Shares [Member] Merger Agreement Creating Ultimate Parent Company [Member] vote	Jun. 07, 2013 Liberty Global plc [Member] Class B Ordinary Shares [Member]	Jun. 07, 2013 Liberty Global plc [Member] Class B Ordinary Shares [Member] Merger Agreement Creating Ultimate Parent Company [Member] vote	Jun. 07, 2013 Liberty Global plc [Member] Class C Ordinary Shares [Member]	Jun. 07, 2013 Liberty Global plc [Member] Class C Ordinary Shares [Member] Merger Agreement Creating Ultimate Parent Company [Member]	Jun. 07, 2013 Liberty Global plc [Member] Series A Common Stock [Member]	Jun. 07, 2013 Liberty Global plc [Member] Series C Common Stock [Member]
Business Acquisition [Line Items]
Common stock, par/nominal value (in dollars per share)	$ 0.01											$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Acquired entity cash received from acquiring entity (in dollars per share)																		$ 17.50
Acquired entity shares received of acquiring entity (in shares)																				0.2582		0.1928			1		1		1
Common stock, issued (in shares)												222,081,117	10,147,184	161,996,684	142,284,430	10,206,145	106,402,667		70,233,842		52,444,170			141,234,331		10,176,295		105,572,797
Number of votes allowed per class of stock (in votes)												10	1												1		10
Granted security interest in escrow account	$ 0	$ 0	$ 1,522.5								$ 3,557.5
Common stock, outstanding (in shares)												222,081,117	10,147,184	161,996,684	142,284,430	10,206,145	106,402,667						272,013,333
Share price (in dollar/euro per share)																														$ 76.24	$ 71.51
Stock incentive awards outstanding (in shares)				13,030,000	9,860,000	3,170,000
Weighted average useful life of acquired intangible assets							7 years
Other current liabilities							1,892.2			35.6
Other current liabilities amortized									22.8
Percentage of debt instrument conversion								94.40%
Transaction fees							$ 50.3