Segment Reporting (Performance Measures) (Schedule) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Information [Line Items]
Revenues	$ 5,074.1	$ 4,566.5	$ 9,662.1	$ 9,083.4
Adjusted OIBDA	2,305.7	2,185.0	4,421.2	4,282.3
Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	5,074.1	4,566.5	9,662.1	9,083.4
Adjusted OIBDA	2,305.7	2,185.0	4,421.2	4,282.3
Operating Segments [Member] | European Operations Division U.K / Ireland [Member]
Segment Reporting Information [Line Items]
Revenues	1,717.7	1,759.6	3,404.2	3,471.0
Adjusted OIBDA	765.5	805.6	1,510.1	1,568.9
Operating Segments [Member] | European Operations Division Netherlands [Member]
Segment Reporting Information [Line Items]
Revenues	678.8	683.9	1,348.6	1,391.3
Adjusted OIBDA	364.1	371.0	732.0	738.9
Operating Segments [Member] | European Operations Division Germany [Member]
Segment Reporting Information [Line Items]
Revenues	643.5	591.0	1,260.6	1,188.9
Adjusted OIBDA	400.3	366.9	779.7	730.9
Operating Segments [Member] | European Operations Division Belgium [Member]
Segment Reporting Information [Line Items]
Revenues	707.3	500.3	1,317.5	1,003.0
Adjusted OIBDA	311.3	260.8	581.1	507.8
Operating Segments [Member] | European Operations Division Switzerland / Austria [Member]
Segment Reporting Information [Line Items]
Revenues	447.0	448.8	880.4	888.1
Adjusted OIBDA	263.6	259.7	521.7	508.5
Operating Segments [Member] | European Operations Division Total Western Europe [Member]
Segment Reporting Information [Line Items]
Revenues	4,194.3	3,983.6	8,211.3	7,942.3
Adjusted OIBDA	2,104.8	2,064.0	4,124.6	4,055.0
Operating Segments [Member] | European Operations Division Central and Eastern Europe [Member]
Segment Reporting Information [Line Items]
Revenues	274.0	267.2	540.1	535.4
Adjusted OIBDA	114.6	118.4	225.5	236.5
Operating Segments [Member] | European Operations Division Central and Other [Member]
Segment Reporting Information [Line Items]
Revenues	(0.9)	(1.0)	(3.3)	(3.8)
Adjusted OIBDA	(82.1)	(72.7)	(166.4)	(140.6)
Operating Segments [Member] | Total European Operations Division [Member]
Segment Reporting Information [Line Items]
Revenues	4,467.4	4,249.8	8,748.1	8,473.9
Adjusted OIBDA	2,137.3	2,109.7	4,183.7	4,150.9
Operating Segments [Member] | Liberty Global Group [Member]
Segment Reporting Information [Line Items]
Revenues	4,471.2	4,255.1	8,755.3	8,484.2
Adjusted OIBDA	2,074.6	2,057.4	4,068.2	4,046.5
Operating Segments [Member] | LiLAC Group CWC [Member]
Segment Reporting Information [Line Items]
Revenues	285.6	0.0	285.6	0.0
Adjusted OIBDA	101.0	0.0	101.0	0.0
Operating Segments [Member] | LiLAC Group Chile [Member]
Segment Reporting Information [Line Items]
Revenues	210.6	220.8	410.6	429.6
Adjusted OIBDA	81.8	87.6	158.1	163.6
Operating Segments [Member] | LiLAC Group Puerto Rico [Member]
Segment Reporting Information [Line Items]
Revenues	106.9	90.6	210.8	169.6
Adjusted OIBDA	50.0	40.8	96.8	74.3
Operating Segments [Member] | LiLAC Division [Member]
Segment Reporting Information [Line Items]
Revenues	603.1	311.4	907.0	599.2
Adjusted OIBDA	232.8	128.4	355.9	237.9
Operating Segments [Member] | LiLAC Group Corporate and Other [Member]
Segment Reporting Information [Line Items]
Adjusted OIBDA	(1.7)	(0.8)	(2.9)	(2.1)
Operating Segments [Member] | LiLAC Group [Member]
Segment Reporting Information [Line Items]
Revenues	602.9	311.4	906.8	599.2
Adjusted OIBDA	231.1	127.6	353.0	235.8
Intersegment Eliminations [Member] | Liberty Global Group [Member]
Segment Reporting Information [Line Items]
Revenues	(11.4)	(7.5)	(22.6)	(15.3)
Intersegment Eliminations [Member] | LiLAC Group [Member]
Segment Reporting Information [Line Items]
Revenues	(0.2)	0.0	(0.2)	0.0
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenues	15.2	12.8	29.8	25.6
Adjusted OIBDA	$ (62.7)	$ (52.3)	$ (115.5)	$ (104.4)