v3.3.1.900

Derivative Instruments (Net Cash Received (Paid) Related to Derivatives) (Schedule) (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |  |
Operating activities | $ (445.7) | $ (402.1) | $ (435.5)
Investing activities | (30.2) | (66.5) | 23.7
Financing activities | (221.0) | 524.5 | (108.4)
Total | $ (696.9) | $ 55.9 | $ (520.2)

X
- Definition Payments for (Proceeds from) Derivative Instrument, Operating Activities + References No definition available. + Details
Name: | lbtya_PaymentsForProceedsFromDerivativeInstrumentOperatingActivities
Namespace Prefix: | lbtya_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Payments For Proceeds From Derivatives Continuing Operations + References No definition available. + Details
Name: | lbtya_PaymentsForProceedsFromDerivativesContinuingOperations
Namespace Prefix: | lbtya_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net cash outflow or inflow from derivative instruments during the period, which are classified as financing activities, excluding those designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3505-108585 + Details
Name: | us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net cash outflow or inflow from derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments. + References No definition available. + Details
Name: | us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration