v3.3.1.900

Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended	12 Months Ended
	Jul. 31, 2014	Sep. 30, 2013	Dec. 31, 2014
Ziggo Acquisition [Member] | Customer Relationships [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount rate			8.50%
Virgin Media Acquisition [Member] | Customer Relationships [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount rate		9.00%
ITV Collar [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount rate	0.00%
ITV Collar [Member] | Minimum [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated volatilities			23.80%
ITV Collar [Member] | Maximum [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated volatilities			27.30%
Ziggo Collar [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loss on derivative not included on consolidated balance sheet			$ 113.3

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Estimated Volatilities

+ References

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- Definition

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Not Included on Consolidated Balance Sheet

+ References

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- Definition

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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