Debt and Capital Lease Obligations (Telenet Credit Facility) (Details)							12 Months Ended								12 Months Ended								1 Months Ended					1 Months Ended
	Dec. 31, 2014 Telenet Credit Facility [Member] USD ($)	Dec. 31, 2014 Telenet Credit Facility [Member] EUR (€)	Dec. 31, 2014 Telenet Facility M [Member] USD ($)	Dec. 31, 2014 Telenet Facility M [Member] EUR (€)	Dec. 31, 2014 Telenet Facility O [Member] USD ($)	Dec. 31, 2014 Telenet Facility O [Member] EUR (€)	Dec. 31, 2014 Telenet Facility P [Member] USD ($)	Dec. 31, 2014 Telenet Facility P [Member] EUR (€)	Dec. 31, 2014 Telenet Facility S [Member] USD ($)	Dec. 31, 2014 Telenet Facility S [Member] EUR (€)	Dec. 31, 2014 Telenet Facility U [Member] USD ($)	Dec. 31, 2014 Telenet Facility U [Member] EUR (€)	Dec. 31, 2014 Telenet Facility V [Member] USD ($)	Dec. 31, 2014 Telenet Facility V [Member] EUR (€)	Dec. 31, 2014 Telenet Facility W [Member] USD ($)	Dec. 31, 2014 Telenet Facility W [Member] EUR (€)	Dec. 31, 2014 Telenet Facility X [Member] USD ($)	Dec. 31, 2014 Telenet Facility X [Member] EUR (€)	Dec. 31, 2014 Telenet Facility Y [Member] USD ($)	Dec. 31, 2014 Telenet Facility Y [Member] EUR (€)	Dec. 31, 2014 Telenet Facility S and X [Member]	Dec. 31, 2014 Elimination of Telenet Facilities M, N, O, P, U and V in Consolidation [Member] USD ($)	Apr. 30, 2014 Telenet [Member] USD ($)	Apr. 30, 2014 Telenet [Member] Telenet Facility S [Member] USD ($)	Apr. 30, 2014 Telenet [Member] Telenet Facility S [Member] EUR (€)	Apr. 29, 2014 Telenet [Member] Telenet Facility S [Member] USD ($)	Apr. 29, 2014 Telenet [Member] Telenet Facility S [Member] EUR (€)	Apr. 30, 2014 Telenet [Member] Senior Secured Notes Due 2016 [Member] USD ($)	Apr. 30, 2014 Telenet [Member] Senior Secured Notes Due 2016 [Member] EUR (€)
Line of Credit Facility [Line Items]
Portion of debt, default of which triggers event of default	$ 60,500,000	€ 50,000,000
Line of credit interest rate description							EURIBOR	EURIBOR	EURIBOR	EURIBOR					EURIBOR	EURIBOR	EURIBOR	EURIBOR	EURIBOR	EURIBOR
Basis spread on variable rate							3.875%	3.875%	2.75%	2.75%					3.25%	3.25%	2.75%	2.75%	3.50%	3.50%
Stated interest rate of debt			6.375%	6.375%	6.625%	6.625%					6.25%	6.25%	6.75%	6.75%														5.30%	5.30%
Facility amount				500,000,000		300,000,000		400,000,000		36,900,000		450,000,000		250,000,000		474,100,000		286,000,000		882,900,000
Unused borrowing capacity	390,800,000		0		0		0		44,700,000		0		0		0		346,100,000		0			0
Outstanding principal amount	1,638,600,000		605,000,000		363,000,000		484,000,000		0		544,500,000		302,500,000		572,500,000		0		1,066,100,000			(2,299,000,000)		44,700,000	36,900,000	191,200,000	158,000,000
Fee on unused portion of credit facility																					1.10%
Gains (losses) on extinguishment of debt																							(11,900,000)
Write off of deferred debt issuance cost																							7,100,000
Payment for debt redemption premium																							3,600,000
Amortization of debt discount (premium)																							1,200,000
Extinguishment of debt																												$ 121,000,000	€ 100,000,000