Derivative Instruments (Interest Rate Collars) (Schedule) (Details) (Interest Rate Collar [Member], EUR €) In Millions, unless otherwise specified	Mar. 31, 2014
January 2020 1,135.0 EUR [Member] | UPC Broadband Holding [Member]
Derivative [Line Items]
Notional amount of derivative	€ 1,135.0
Minimum rate	1.00%
Maximum rate	3.54%
July 2017 950.0 EUR [Member] | Telenet International [Member]
Derivative [Line Items]
Notional amount of derivative	€ 950.0
Minimum rate	2.00%
Maximum rate	4.00%