Derivative Instruments (Foreign Currency Forwards) (Schedule) (Details) (Foreign Exchange Forward [Member]) In Millions, unless otherwise specified	Mar. 31, 2014 LGE Financing [Member] Foreign Currency Forward 1 [Member] USD ($)	Mar. 31, 2014 LGE Financing [Member] Foreign Currency Forward 1 [Member] EUR (€)	Mar. 31, 2014 LGE Financing [Member] Foreign Currency Forward 2 [Member] USD ($)	Mar. 31, 2014 LGE Financing [Member] Foreign Currency Forward 2 [Member] EUR (€)	Mar. 31, 2014 UPC Holding [Member] Foreign Currency Forward 3 [Member] USD ($)	Mar. 31, 2014 UPC Holding [Member] Foreign Currency Forward 3 [Member] CHF	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 4 [Member] USD ($)	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 4 [Member] CZK	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 5 [Member] CHF	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 5 [Member] EUR (€)	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 6 [Member] CZK	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 6 [Member] EUR (€)	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 7 [Member] EUR (€)	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 7 [Member] HUF	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 8 [Member] EUR (€)	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 8 [Member] PLN	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 9 [Member] EUR (€)	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 9 [Member] GBP (£)	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 10 [Member] CHF	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 10 [Member] EUR (€)	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 11 [Member] CZK	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 11 [Member] EUR (€)	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 12 [Member] EUR (€)	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 12 [Member] HUF	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 13 [Member] EUR (€)	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 13 [Member] PLN	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 14 [Member] EUR (€)	Mar. 31, 2014 UPC Broadband Holding [Member] Foreign Currency Forward 14 [Member] RON	Mar. 31, 2014 Telenet NV [Member] Foreign Currency Forward 15 [Member] USD ($)	Mar. 31, 2014 Telenet NV [Member] Foreign Currency Forward 15 [Member] EUR (€)	Mar. 31, 2014 VTR GlobalCom [Member] Foreign Currency Forward 16 [Member] USD ($)	Mar. 31, 2014 VTR GlobalCom [Member] Foreign Currency Forward 16 [Member] CLP
Derivative [Line Items]
Notional amount of derivative	$ 2.6	€ 2.0	$ 150.0	€ 109.1	$ 479.0	415.1	$ 3.0	59.3	72.5	€ 59.2	477.6	€ 18.0	€ 16.5	5,100.0	€ 48.0	208.5	€ 4.3	£ 3.6	27.5	€ 22.6	300.0	€ 10.9	€ 10.0	3,100.0	€ 12.0	50.0	€ 3.6	16.0	$ 36.0	€ 26.6	$ 26.3	14,250.1