Condensed Consolidated Statement of Equity - 6 months ended Jun. 30, 2015 - USD ($) $ in Millions	Total	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive earnings, net of taxes	Treasury shares, at cost	Total Liberty Global shareholders	Non-controlling interests	Class A Ordinary Shares [Member] Old Liberty Global Ordinary Shares	Class B Ordinary Shares [Member] Old Liberty Global Ordinary Shares	Class C Ordinary Shares [Member] Old Liberty Global Ordinary Shares
Beginning balance at Dec. 31, 2014	$ 14,116.0	$ 17,070.8	$ (4,007.6)	$ 1,646.6	$ (4.2)	$ 14,714.5	$ (598.5)	$ 2.5	$ 0.1	$ 6.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(931.6)		(1,002.2)			(1,002.2)	70.6
Other comprehensive earnings, net of taxes	238.6			238.5		238.5	0.1
Repurchase and cancellation of Old Liberty Global Ordinary Shares (note 9)	(935.8)	(935.7)				(935.8)				(0.1)
Share-based compensation (note 10)	104.3	104.3				104.3
Liberty Global call option contracts	(81.6)	(81.5)				(81.6)				(0.1)
Adjustments due to changes in subsidiaries’ equity and other, net	(36.7)	(54.9)			3.4	(51.5)	14.8
Ending balance at Jun. 30, 2015	$ 12,473.2	$ 16,103.0	$ (5,009.8)	$ 1,885.1	$ (0.8)	$ 12,986.2	$ (513.0)	$ 2.5	$ 0.1	$ 6.1