Long-lived Assets (Schedule of Changes in Carrying Amount of Goodwill) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2015 USD ($)
Goodwill [Roll Forward]
Goodwill beginning balance	$ 29,001.6
Acquisitions and related adjustments	190.4
Foreign currency translation adjustments	(1,033.0)
Goodwill ending balance	28,159.0
European Operations Division U.K / Ireland [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	9,245.1
Acquisitions and related adjustments	0.4
Foreign currency translation adjustments	66.2
Goodwill ending balance	9,311.7
European Operations Division Netherlands [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	8,605.0
Acquisitions and related adjustments	138.0
Foreign currency translation adjustments	(687.9)
Goodwill ending balance	8,055.1
European Operations Division Germany [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	3,456.9
Acquisitions and related adjustments	0.0
Foreign currency translation adjustments	(270.6)
Goodwill ending balance	3,186.3
European Operations Division Belgium [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	1,978.9
Acquisitions and related adjustments	0.0
Foreign currency translation adjustments	(154.9)
Goodwill ending balance	1,824.0
European Operations Division Switzerland / Austria [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	3,591.9
Acquisitions and related adjustments	0.0
Foreign currency translation adjustments	122.1
Goodwill ending balance	3,714.0
European Operations Division Total Western Europe [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	26,877.8
Acquisitions and related adjustments	138.4
Foreign currency translation adjustments	(925.1)
Goodwill ending balance	26,091.1
European Operations Division Central and Eastern Europe [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	1,302.1
Acquisitions and related adjustments	0.5
Foreign currency translation adjustments	(85.7)
Goodwill ending balance	1,216.9
Total European Operations Division [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	28,179.9
Acquisitions and related adjustments	138.9
Foreign currency translation adjustments	(1,010.8)
Goodwill ending balance	27,308.0
Corporate and Other [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	34.4
Acquisitions and related adjustments	0.0
Foreign currency translation adjustments	0.1
Goodwill ending balance	34.5
Liberty Global Group [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	28,214.3
Acquisitions and related adjustments	138.9
Foreign currency translation adjustments	(1,010.7)
Goodwill ending balance	27,342.5
LiLAC Group Chile [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	440.3
Acquisitions and related adjustments	0.0
Foreign currency translation adjustments	(22.3)
Goodwill ending balance	418.0
LiLAC Group Puerto Rico [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	226.1
Acquisitions and related adjustments	51.5
Foreign currency translation adjustments	0.0
Goodwill ending balance	277.6
LiLAC Division [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	666.4
Acquisitions and related adjustments	51.5
Foreign currency translation adjustments	(22.3)
Goodwill ending balance	695.6
LiLAC Group Corporate and Other [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	120.9
Acquisitions and related adjustments	0.0
Foreign currency translation adjustments	0.0
Goodwill ending balance	120.9
LiLAC Group [Member]
Goodwill [Roll Forward]
Goodwill beginning balance	787.3
Acquisitions and related adjustments	51.5
Foreign currency translation adjustments	(22.3)
Goodwill ending balance	$ 816.5