Subsequent Events (Details)	Sep. 30, 2014 Virgin Media Finance [Member] VM Senior Notes [Member] USD ($)	Sep. 30, 2014 Virgin Media Finance [Member] VM Senior Notes [Member] GBP (£)	Sep. 30, 2014 Virgin Media Finance [Member] 2024 VM Senior Notes [Member]	Oct. 07, 2014 Subsequent Event [Member] Virgin Media Finance [Member] 2024 VM Sterling Senior Notes [Member] USD ($)	Oct. 07, 2014 Subsequent Event [Member] Virgin Media Finance [Member] 2024 VM Sterling Senior Notes [Member] GBP (£)	Oct. 07, 2014 Subsequent Event [Member] Virgin Media Finance [Member] 2024 VM Dollar Senior Notes [Member] USD ($)	Oct. 07, 2014 Subsequent Event [Member] Virgin Media Finance [Member] VM Dollar Senior Notes, 2019 [Member] USD ($)	Oct. 07, 2014 Subsequent Event [Member] Virgin Media Finance [Member] VM Sterling Senior Notes, 2019 [Member] USD ($)	Oct. 07, 2014 Subsequent Event [Member] Virgin Media Finance [Member] VM Sterling Senior Notes, 2019 [Member] GBP (£)	Oct. 07, 2014 Subsequent Event [Member] Virgin Media Finance [Member] VM Senior Notes [Member] USD ($)	Oct. 07, 2014 Subsequent Event [Member] Virgin Media Finance [Member] VM Senior Notes [Member] GBP (£)	Oct. 07, 2014 Subsequent Event [Member] Virgin Media Finance [Member] 2024 VM Senior Notes [Member]	Oct. 22, 2014 Subsequent Event [Member] UnityMedia KabelBW [Member] 2025 UM Senior Notes [Member] USD ($)	Oct. 22, 2014 Subsequent Event [Member] UnityMedia KabelBW [Member] 2025 UM Senior Notes [Member] EUR (€)	Oct. 07, 2014 Subsequent Event [Member] UnityMedia KabelBW [Member] 2025 UM Senior Notes [Member]	Oct. 22, 2014 Subsequent Event [Member] UnityMedia KabelBW [Member] 2019 UM Senior Notes [Member] USD ($)	Oct. 22, 2014 Subsequent Event [Member] UnityMedia KabelBW [Member] 2019 UM Senior Notes [Member] EUR (€)
Subsequent Event [Line Items]
Principal amount of debt				$ 486,600,000	£ 300,000,000	$ 500,000,000							$ 900,000,000
Interest rate				6.375%	6.375%	6.00%	8.375%	8.875%	8.875%				6.125%	6.125%		9.625%	9.625%
Debt redemption amount							507,100,000	411,200,000	253,500,000							839,900,000	665,000,000
Debt acceleration covenant threshold for event of default	$ 121,700,000	£ 75,000,000								$ 121,700,000	£ 75,000,000		$ 94,700,000	€ 75,000,000
Additional basis points used to determine redemption premium												50.00%	50.00%	50.00%
Mandatory redemption price on senior Notes in event that certain assets sold or specific control changed			101.00%										101.00%	101.00%
2019				103.188%	103.188%	103.00%
2020				102.125%	102.125%	102.00%									103.063%
2021				101.063%	101.063%	101.00%									102.042%
2022															101.021%
2022 and thereafter				100.00%	100.00%	100.00%
2023 and thereafter															100.00%