Segment Reporting (Capital Expenditures of Reportable Segments) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Total property and equipment additions	$ 1,965.5	$ 1,881.0
Assets acquired under capital-related vendor financing arrangements	(675.9)	(401.8)
Assets acquired under capital leases	(74.5)	(89.8)
Changes in current liabilities related to capital expenditures	47.3	12.6
Total capital expenditures	1,262.4	1,402.0
European Operations Division U.K / Ireland [Member]
Segment Reporting Information [Line Items]
Total property and equipment additions	723.2	739.6
European Operations Division Netherlands [Member]
Segment Reporting Information [Line Items]
Total property and equipment additions	251.9	109.4
European Operations Division Germany [Member]
Segment Reporting Information [Line Items]
Total property and equipment additions	268.1	280.8
European Operations Division Belgium [Member]
Segment Reporting Information [Line Items]
Total property and equipment additions	139.9	211.7
European Operations Division Switzerland / Austria [Member]
Segment Reporting Information [Line Items]
Total property and equipment additions	139.3	158.7
European Operations Division Total Western Europe [Member]
Segment Reporting Information [Line Items]
Total property and equipment additions	1,522.4	1,500.2
European Operations Division Central and Eastern Europe [Member]
Segment Reporting Information [Line Items]
Total property and equipment additions	113.3	106.7
European Operations Division Central and Other [Member]
Segment Reporting Information [Line Items]
Total property and equipment additions	162.2	135.7
Total European Operations Division [Member]
Segment Reporting Information [Line Items]
Total property and equipment additions	1,797.9	1,742.6
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Total property and equipment additions	41.7	3.9
Liberty Global Group [Member]
Segment Reporting Information [Line Items]
Total property and equipment additions	1,839.6	1,746.5
LiLAC Group Chile [Member]
Segment Reporting Information [Line Items]
Total property and equipment additions	89.6	101.3
LiLAC Group Puerto Rico [Member]
Segment Reporting Information [Line Items]
Total property and equipment additions	36.3	33.2
LiLAC Group [Member]
Segment Reporting Information [Line Items]
Total property and equipment additions	$ 125.9	$ 134.5