Derivative Instruments (Interest Rate Caps) (Schedule) (Details) (EUR €) In Millions, unless otherwise specified	Sep. 30, 2014
January 2015 — January 2020 735.0 EUR 7.00 Percent [Member] | Interest Rate Cap [Member] | LGE Financing [Member]
Derivative [Line Items]
Notional amount of derivative	€ 735.0
Maximum rate	7.00%
June 2015 to June 2017 50Euro 4.5Percent [Member] | Interest Rate Cap [Member] | Telenet International [Member]
Derivative [Line Items]
Notional amount of derivative	50.0
Maximum rate	4.50%
December 2017 0.8 EUR 6.50 Percent [Member] | Interest Rate Cap [Member] | Telenet NV [Member]
Derivative [Line Items]
Notional amount of derivative	0.8
Maximum rate	6.50%
December 2017 0.8 EUR 5.50 Percent [Member] | Interest Rate Cap [Member] | Telenet NV [Member]
Derivative [Line Items]
Notional amount of derivative	0.8
Maximum rate	5.50%
January 2015 to January 2020 735.0 EUR 7.00 Percent [Member] | Interest Rate Cap Sold [Member] | UPC Broadband Holding [Member]
Derivative [Line Items]
Notional amount of derivative	€ 735.0
Maximum rate	7.00%