Derivative Instruments (Foreign Currency Forwards) (Schedule) (Details) - Jun. 30, 2016 € 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
Foreign Currency Forward 1 [Member] | LGE Financing [Member]
Derivative [Line Items]
Notional amount of derivative						€ 193.0	$ 221.5
Foreign Currency Forward 2 [Member] | LGE Financing [Member]
Derivative [Line Items]
Notional amount of derivative	£ 86.0						125.5
Foreign Currency Forward 3 [Member] | LGE Financing [Member]
Derivative [Line Items]
Notional amount of derivative	167.4						208.7
Foreign Currency Forward 4 [Member] | LGE Financing [Member]
Derivative [Line Items]
Notional amount of derivative	0.9					1.1
Foreign Currency Forward 5 [Member] | UPC Broadband Holding [Member]
Derivative [Line Items]
Notional amount of derivative				CZK 60.0			2.5
Foreign Currency Forward 6 [Member] | UPC Broadband Holding [Member]
Derivative [Line Items]
Notional amount of derivative			SFr 71.1			65.2
Foreign Currency Forward 7 [Member] | UPC Broadband Holding [Member]
Derivative [Line Items]
Notional amount of derivative				540.0		20.1
Foreign Currency Forward 8 [Member] | UPC Broadband Holding [Member]
Derivative [Line Items]
Notional amount of derivative		HUF 6,000.0				18.9
Foreign Currency Forward 9 [Member] | UPC Broadband Holding [Member]
Derivative [Line Items]
Notional amount of derivative					PLN 158.3	36.0
Foreign Currency Forward 10 [Member] | UPC Broadband Holding [Member]
Derivative [Line Items]
Notional amount of derivative						4.6			RON 21.0
Foreign Currency Forward 11 [Member] | UPC Broadband Holding [Member]
Derivative [Line Items]
Notional amount of derivative	£ 2.7					3.6
Foreign Currency Forward 12 [Member] | UPC Broadband Holding [Member]
Derivative [Line Items]
Notional amount of derivative				CZK 320.0		11.8
Foreign Currency Forward 13 [Member] | UPC Broadband Holding [Member]
Derivative [Line Items]
Notional amount of derivative		HUF 3,500.0				11.1
Foreign Currency Forward 14 [Member] | UPC Broadband Holding [Member]
Derivative [Line Items]
Notional amount of derivative					PLN 153.0	34.4
Foreign Currency Forward 15 [Member] | Telenet [Member]
Derivative [Line Items]
Notional amount of derivative						€ 38.9	43.6
Foreign Currency Forward 16 [Member] | VTR [Member]
Derivative [Line Items]
Notional amount of derivative							$ 186.0	CLP 131,568.4