Debt and Capital Lease Obligations (Telenet SPE Notes) (Details)	Dec. 31, 2014 Telenet SPE Notes [Member]	Dec. 31, 2014 Telenet Finance Notes [Member]	Dec. 31, 2014 Telenet Finance III Notes [Member]	Dec. 31, 2014 6.25% Telenet Finance V Notes [Member]	Dec. 31, 2014 6.75% Telenet Finance V Notes [Member]	Dec. 31, 2014 Telenet SPE [Member]	Dec. 31, 2014 Telenet SPE [Member] Telenet Finance Notes [Member] USD ($)	Dec. 31, 2014 Telenet SPE [Member] Telenet Finance Notes [Member] EUR (€)	Dec. 31, 2014 Telenet SPE [Member] Telenet Finance III Notes [Member] USD ($)	Dec. 31, 2014 Telenet SPE [Member] Telenet Finance III Notes [Member] EUR (€)	Dec. 31, 2014 Telenet SPE [Member] Telenet Finance IV Notes [Member] USD ($)	Dec. 31, 2014 Telenet SPE [Member] Telenet Finance IV Notes [Member] EUR (€)	Dec. 31, 2014 Telenet SPE [Member] 6.25% Telenet Finance V Notes [Member] USD ($)	Dec. 31, 2014 Telenet SPE [Member] 6.25% Telenet Finance V Notes [Member] EUR (€)	Dec. 31, 2014 Telenet SPE [Member] 6.75% Telenet Finance V Notes [Member] USD ($)	Dec. 31, 2014 Telenet SPE [Member] 6.75% Telenet Finance V Notes [Member] EUR (€)
Debt Instrument [Line Items]
Percent of ownership in special purpose financing entity						100.00%
Principal amount of debt							$ 605,000,000	€ 500,000,000	$ 363,000,000	€ 300,000,000	$ 484,000,000	€ 400,000,000	$ 544,500,000	€ 450,000,000	$ 302,500,000	€ 250,000,000
Stated interest rate of debt		6.375%	6.625%	6.25%	6.75%		6.375%	6.375%	6.625%	6.625%			6.25%	6.25%	6.75%	6.75%
Debt instrument, redemption rate	100.00%