Derivative Instruments (Foreign Currency Forwards) (Schedule) (Details) (Foreign Exchange Forward [Member]) In Millions, unless otherwise specified	Sep. 30, 2014 LGE Financing [Member] Foreign Currency Forward 1 [Member] USD ($)	Sep. 30, 2014 LGE Financing [Member] Foreign Currency Forward 1 [Member] EUR (€)	Sep. 30, 2014 LGE Financing [Member] Foreign Currency Forward 2 [Member] EUR (€)	Sep. 30, 2014 LGE Financing [Member] Foreign Currency Forward 2 [Member] GBP (£)	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 3 [Member] USD ($)	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 3 [Member] CZK	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 4 [Member] CHF	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 4 [Member] EUR (€)	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 5 [Member] CZK	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 5 [Member] EUR (€)	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 6 [Member] EUR (€)	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 6 [Member] HUF	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 7 [Member] EUR (€)	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 7 [Member] PLN	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 8 [Member] EUR (€)	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 8 [Member] GBP (£)	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 9 [Member] CHF	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 9 [Member] EUR (€)	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 10 [Member] CZK	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 10 [Member] EUR (€)	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 11 [Member] EUR (€)	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 11 [Member] HUF	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 12 [Member] EUR (€)	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 12 [Member] PLN	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 13 [Member] EUR (€)	Sep. 30, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 13 [Member] RON	Sep. 30, 2014 Telenet NV [Member] Foreign Currency Forward 14 [Member] USD ($)	Sep. 30, 2014 Telenet NV [Member] Foreign Currency Forward 14 [Member] EUR (€)	Sep. 30, 2014 VTR GlobalCom [Member] Foreign Currency Forward 15 [Member] USD ($)	Sep. 30, 2014 VTR GlobalCom [Member] Foreign Currency Forward 15 [Member] CLP
Derivative [Line Items]
Notional amount of derivative	$ 301.4	€ 236.5	€ 67.2	£ 52.5	$ 1.5	29.8	37.3	€ 30.6	244.5	€ 9.0	€ 8.2	2,550.0	€ 24.0	102.4	€ 2.5	£ 2.1	22.0	€ 18.2	300.0	€ 10.9	€ 14.5	4,500.0	€ 13.2	55.0	€ 7.6	33.5	$ 10.5	€ 7.7	$ 28.2	16,248.6