Derivative Instruments (Net Cash Received (Paid) Related to Derivatives) (Schedule) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Operating activities	$ (415.5)	$ (393.4)
Investing activities	(16.6)	(66.6)
Financing activities	(146.7)	537.0
Total	$ (578.8)	$ 77.0

Payments for (Proceeds from) Derivative Instrument, Operating Activities

No definition available.

Name:	lbtya_PaymentsForProceedsFromDerivativeInstrumentOperatingActivities
Namespace Prefix:	lbtya_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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

- Details

Name:	us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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=31042434&loc=d3e3505-108585

+ Details

Name:	us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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