Share-based Compensation (Option Plans) (Details) In Millions, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013 Telenet USD ($)	Jun. 30, 2013 Telenet EUR (€)	Jun. 30, 2013 Specific Stock Option Plan [Member] Telenet EUR (€)		Jun. 30, 2013 Class A Ordinary Shares [Member] Stock Options [Member] USD ($)	Jun. 30, 2013 Class C Ordinary Shares [Member] Stock Options [Member] USD ($)
Number of shares
Outstanding at beginning of period (in shares)			833,594		804,617	842,771
Virgin Media Replacement Awards (in shares)					3,934,574	2,935,250
Granted (in shares)			256,490	[1]	62,314	67,334
Cancelled (in shares)					(25,541)	(19,061)
Exercised (in shares)					(417,212)	(322,482)
Other period increase (decrease) - (in dollars/euros per share)			252,540
Outstanding at end of period (in shares)			1,342,624		4,358,752	3,503,812
Exercisable at end of period (in shares)			0		2,564,458	2,131,055
Weighted average exercise price
Options outstanding at beginning of period (in dollars/euros per share)			€ 18.66		$ 25.90	$ 24.59
Virgin Media Replacement Awards (in dollars/euros per share)					$ 31.16	$ 27.16
Granted (in dollars/euros per share)	$ 23.72	€ 18.24	€ 20.27	[1]	$ 73.66	$ 68.16
Cancelled (in dollars/euros per share)					$ 76.24	$ 71.51
Exercised (in dollars/euros per share)					$ 24.01	$ 21.23
Other period increase (decrease) - in shares			€ (3.58)
Options outstanding at end of period (in dollars/euros per share)			€ 15.46		$ 31.33	$ 27.74
Exercisable at end of period (in dollars/euros per share)			€ 0.00		$ 26.98	$ 23.58
Weighted average remaining contractual term, in years
Outstanding at end of period			4 years 2 months 12 days		6 years 3 months 18 days	6 years 1 month 6 days
Exercisable at end of period			0 years		4 years 10 months 24 days	4 years 8 months 12 days
Aggregate intrinsic value
Outstanding at end of period			€ 26.6		$ 184.0	$ 140.7
Exercisable at end of period			€ 0		$ 119.3	$ 94.4

[1] Represents the number of options granted during the three months ended March, 31, 2013. The vesting of these options was accelerated to March 31, 2013 in connection with the resignation of Telenet’s Chief Executive Officer. As a result of this accelerated vesting, Telenet recorded additional share-based compensation of $6.2 million during the first quarter of 2013. All of the vested options pursuant to the Telenet Specific Stock Option Plan become exercisable during defined exercise periods following January 1, 2014. The fair value of these options was calculated on the date that the performance criteria was set using an expected volatility of 23.3%, an expected life of 3.3 years, and a risk-free return of 0.33%. The grant date fair value of these options was €18.24 ($23.72).