Segment Reporting (Performance Measures) (Schedule) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Revenues	$ 5,207.2	$ 4,597.4	$ 14,869.3	$ 13,680.8
Adjusted OIBDA	2,414.6	2,191.9	6,835.8	6,474.2
Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	5,207.2	4,597.4	14,869.3	13,680.8
Adjusted OIBDA	2,414.6	2,191.9	6,835.8	6,474.2
Operating Segments [Member] | European Operations Division U.K / Ireland [Member]
Segment Reporting Information [Line Items]
Revenues	1,581.4	1,783.3	4,985.6	5,254.3
Adjusted OIBDA	696.0	777.0	2,206.1	2,345.9
Operating Segments [Member] | European Operations Division Netherlands [Member]
Segment Reporting Information [Line Items]
Revenues	681.8	681.4	2,030.4	2,072.7
Adjusted OIBDA	375.5	388.6	1,107.5	1,127.5
Operating Segments [Member] | European Operations Division Germany [Member]
Segment Reporting Information [Line Items]
Revenues	639.4	603.5	1,900.0	1,792.4
Adjusted OIBDA	408.0	380.9	1,187.7	1,111.8
Operating Segments [Member] | European Operations Division Belgium [Member]
Segment Reporting Information [Line Items]
Revenues	693.4	512.5	2,010.9	1,515.5
Adjusted OIBDA	311.1	258.3	892.2	766.1
Operating Segments [Member] | European Operations Division Switzerland / Austria [Member]
Segment Reporting Information [Line Items]
Revenues	439.3	437.9	1,319.7	1,326.0
Adjusted OIBDA	273.4	269.6	795.1	778.1
Operating Segments [Member] | European Operations Division Total Western Europe [Member]
Segment Reporting Information [Line Items]
Revenues	4,035.3	4,018.6	12,246.6	11,960.9
Adjusted OIBDA	2,064.0	2,074.4	6,188.6	6,129.4
Operating Segments [Member] | European Operations Division Central and Eastern Europe [Member]
Segment Reporting Information [Line Items]
Revenues	274.5	266.2	814.6	801.6
Adjusted OIBDA	120.4	119.0	345.9	355.5
Operating Segments [Member] | European Operations Division Central and Other [Member]
Segment Reporting Information [Line Items]
Revenues	(1.9)	0.1	(5.2)	(3.7)
Adjusted OIBDA	(77.0)	(74.0)	(243.7)	(214.6)
Operating Segments [Member] | Total European Operations Division [Member]
Segment Reporting Information [Line Items]
Revenues	4,307.9	4,284.9	13,056.0	12,758.8
Adjusted OIBDA	2,107.4	2,119.4	6,290.8	6,270.3
Operating Segments [Member] | Liberty Global Group [Member]
Segment Reporting Information [Line Items]
Revenues	4,313.1	4,288.6	13,068.4	12,772.8
Adjusted OIBDA	2,060.0	2,064.1	6,128.2	6,110.6
Operating Segments [Member] | LiLAC Group CWC [Member]
Segment Reporting Information [Line Items]
Revenues	568.5	0.0	854.1	0.0
Adjusted OIBDA	214.5	0.0	315.5	0.0
Operating Segments [Member] | LiLAC Group Chile [Member]
Segment Reporting Information [Line Items]
Revenues	221.3	204.3	631.9	633.9
Adjusted OIBDA	86.9	82.5	245.0	246.1
Operating Segments [Member] | LiLAC Group Puerto Rico [Member]
Segment Reporting Information [Line Items]
Revenues	104.8	104.5	315.6	274.1
Adjusted OIBDA	56.1	46.4	152.9	120.7
Operating Segments [Member] | LiLAC Division [Member]
Segment Reporting Information [Line Items]
Revenues	894.6	308.8	1,801.6	908.0
Adjusted OIBDA	357.5	128.9	713.4	366.8
Operating Segments [Member] | LiLAC Group Corporate and Other [Member]
Segment Reporting Information [Line Items]
Adjusted OIBDA	(2.9)	(1.1)	(5.8)	(3.2)
Operating Segments [Member] | LiLAC Group [Member]
Segment Reporting Information [Line Items]
Revenues	894.1	308.8	1,800.9	908.0
Adjusted OIBDA	354.6	127.8	707.6	363.6
Intersegment Eliminations [Member] | Liberty Global Group [Member]
Segment Reporting Information [Line Items]
Revenues	(12.8)	(4.6)	(35.4)	(19.9)
Intersegment Eliminations [Member] | LiLAC Group [Member]
Segment Reporting Information [Line Items]
Revenues	(0.5)	0.0	(0.7)	0.0
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenues	18.0	8.3	47.8	33.9
Adjusted OIBDA	$ (47.4)	$ (55.3)	$ (162.6)	$ (159.7)