XML 40 R73.htm IDEA: XBRL DOCUMENT v2.4.1.9
Fair Value Measurements (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 9 Months Ended 1 Months Ended
Dec. 31, 2014
Sep. 30, 2013
Jul. 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%us-gaap_FairValueInputsDiscountRate
/ us-gaap_BusinessAcquisitionAxis
= lbtya_ZiggoAcquisitionMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember		    
Virgin Media Acquisition [Member] | Customer Relationships [Member] | Level 3 [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Discount rate   9.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_BusinessAcquisitionAxis
= lbtya_VirginMediaAcquisitionMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember		  
ITV Collar [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Discount rate     0.00%us-gaap_FairValueInputsDiscountRate
/ us-gaap_DerivativeInstrumentRiskAxis
= lbtya_ITVCollarMember
ITV Collar [Member] | Minimum [Member] | Level 3 [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Estimated volatilities 23.80%lbtya_EstimatedVolatilities
/ us-gaap_DerivativeInstrumentRiskAxis
= lbtya_ITVCollarMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		    
ITV Collar [Member] | Maximum [Member] | Level 3 [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Estimated volatilities 27.30%lbtya_EstimatedVolatilities
/ us-gaap_DerivativeInstrumentRiskAxis
= lbtya_ITVCollarMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		    
Ziggo Collar [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Loss on derivative not included on consolidated balance sheet 113.3lbtya_FairValueNetDerivativeAssetLiabilityMeasuredonRecurringBasisUnobservableInputsReconciliationGainLossNotIncludedonConsolidatedBalanceSheet
/ us-gaap_DerivativeInstrumentRiskAxis
= lbtya_ZiggoCollarMember