Derivative Instruments (Foreign Currency Forwards) (Schedule) (Details) - Jun. 30, 2015 - Foreign Exchange Forward [Member] € in Millions, £ in Millions, SFr in Millions, RON in Millions, PLN in Millions, HUF in Millions, CZK in Millions, CLP in Millions, $ in Millions	GBP (£)	HUF	CHF (SFr)	CZK	PLN	EUR (€)	USD ($)	CLP	RON
LGE Financing [Member] | Foreign Currency Forward 1 [Member]
Derivative [Line Items]
Notional amount of derivative						€ 334.8	$ 375.6
UPC Broadband Holding [Member] | Foreign Currency Forward 2 [Member]
Derivative [Line Items]
Notional amount of derivative				CZK 405.0			16.6
UPC Broadband Holding [Member] | Foreign Currency Forward 3 [Member]
Derivative [Line Items]
Notional amount of derivative			SFr 58.3			50.5
UPC Broadband Holding [Member] | Foreign Currency Forward 4 [Member]
Derivative [Line Items]
Notional amount of derivative				405.0		14.6
UPC Broadband Holding [Member] | Foreign Currency Forward 5 [Member]
Derivative [Line Items]
Notional amount of derivative		HUF 4,500.0				14.4
UPC Broadband Holding [Member] | Foreign Currency Forward 6 [Member]
Derivative [Line Items]
Notional amount of derivative					PLN 120.0	28.3
UPC Broadband Holding [Member] | Foreign Currency Forward 7 [Member]
Derivative [Line Items]
Notional amount of derivative						27.0			RON 121.1
UPC Broadband Holding [Member] | Foreign Currency Forward 8 [Member]
Derivative [Line Items]
Notional amount of derivative	£ 2.7					3.6
UPC Broadband Holding [Member] | Foreign Currency Forward 9 [Member]
Derivative [Line Items]
Notional amount of derivative			SFr 35.5			34.0
UPC Broadband Holding [Member] | Foreign Currency Forward 10 [Member]
Derivative [Line Items]
Notional amount of derivative				CZK 500.0		18.4
UPC Broadband Holding [Member] | Foreign Currency Forward 11 [Member]
Derivative [Line Items]
Notional amount of derivative		HUF 6,000.0				19.2
UPC Broadband Holding [Member] | Foreign Currency Forward 12 [Member]
Derivative [Line Items]
Notional amount of derivative					PLN 60.0	14.4
UPC Broadband Holding [Member] | Foreign Currency Forward 13 [Member]
Derivative [Line Items]
Notional amount of derivative						1.1			RON 5.0
Telenet [Member] | Foreign Currency Forward 14 [Member]
Derivative [Line Items]
Notional amount of derivative						€ 48.4	54.3
VTR [Member] | Foreign Currency Forward 15 [Member]
Derivative [Line Items]
Notional amount of derivative							$ 84.1	CLP 52,149.9