Business Acquisition Acquired Entity Cash Per Share Received from Acquiring Entity in Part Non-cash Transaction

No definition available.

Name:	lbtya_BusinessAcquisitionAcquiredEntityCashPerSharetoBeReceivedfromAcquiringEntityinPartNoncashTransaction
Namespace Prefix:	lbtya_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Business Acquisition Acquired Entity Shares Received of Acquiring Entity in Part Non-cash Transaction

+ References

No definition available.

+ Details

Name:	lbtya_BusinessAcquisitionAcquiredEntitySharesReceivedofAcquiringEntityinPartNoncashTransaction
Namespace Prefix:	lbtya_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Business Acquisition Granted Security Interest In Escrow Account

+ References

No definition available.

+ Details

Name:	lbtya_BusinessAcquisitionGrantedSecurityInterestInEscrowAccount
Namespace Prefix:	lbtya_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Amortized

+ References

No definition available.

+ Details

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

- Definition

Business Combination, Stock Incentive Awards Outstanding

+ References

No definition available.

+ Details

Name:	lbtya_BusinessCombinationStockIncentiveAwardsOutstanding
Namespace Prefix:	lbtya_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of Debt Instrument Conversion

+ References

No definition available.

+ Details

Name:	lbtya_PercentageofDebtInstrumentConversion
Namespace Prefix:	lbtya_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

+ Details

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Amount of other liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 30
-Article 5

+ Details

Name:	us-gaap_CommonStockSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 30
-Article 5

+ Details

Name:	us-gaap_CommonStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=lbtya_VirginMediaAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lbtya_VMConvertibleNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=lbtya_CapacityArrangementContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=lbtya_MergerAgreementCreatingUltimateParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lbtya_VmSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=lbtya_ClassOrdinarySharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=lbtya_ClassBOrdinarySharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=lbtya_ClassCOrdinarySharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=lbtya_VirginMediaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=us-gaap_ParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Acquisitions (Virgin Media) (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions		7 Months Ended	12 Months Ended
	Jun. 07, 2013	Dec. 31, 2013	Dec. 31, 2014	Feb. 28, 2013
Business Acquisition [Line Items]
Stock incentive awards outstanding (in shares)	13,030,000
Options [Member]
Business Acquisition [Line Items]
Stock incentive awards outstanding (in shares)	9,860,000
RSUs [Member]
Business Acquisition [Line Items]
Stock incentive awards outstanding (in shares)	3,170,000
Virgin Media Acquisition [Member]
Business Acquisition [Line Items]
Weighted average useful life of acquired intangible assets	7 years
Other accrued and current liabilities	$ (1,892.2)
Acquisition costs	51.5
Virgin Media Acquisition [Member] \| VM Convertible Notes [Member]
Business Acquisition [Line Items]
Percentage of debt instrument conversion		94.40%
Virgin Media Acquisition [Member] \| Capacity Arrangement Contract [Member]
Business Acquisition [Line Items]
Other accrued and current liabilities	$ (35.6)
Other current liabilities amortized		$ 22.8	$ 12.8
Virgin Media Merger Agreement [Member] \| VM Senior Notes [Member]
Business Acquisition [Line Items]
Granted security interest in escrow account				$ 3,557.5
Class A Ordinary Shares [Member]
Business Acquisition [Line Items]
Common stock, issued (in shares)		222,081,117	251,167,686
Common stock, outstanding (in shares)		222,081,117	251,167,686
Class B Ordinary Shares [Member]
Business Acquisition [Line Items]
Common stock, issued (in shares)		10,147,184	10,139,184
Common stock, outstanding (in shares)		10,147,184	10,139,184
Class C Ordinary Shares [Member]
Business Acquisition [Line Items]
Common stock, issued (in shares)		556,221,669	630,353,372
Common stock, outstanding (in shares)		556,221,669	630,353,372
Virgin Media [Member] \| Virgin Media Merger Agreement [Member]
Business Acquisition [Line Items]
Acquired entity cash received from acquiring entity (in dollars per share)	$ 17.50
Virgin Media [Member] \| Class A Ordinary Shares [Member]
Business Acquisition [Line Items]
Common stock, issued (in shares)	70,233,842
Virgin Media [Member] \| Class A Ordinary Shares [Member] \| Virgin Media Merger Agreement [Member]
Business Acquisition [Line Items]
Acquired entity shares received of acquiring entity (in shares)	0.2582
Virgin Media [Member] \| Class C Ordinary Shares [Member]
Business Acquisition [Line Items]
Common stock, issued (in shares)	175,122,182
Virgin Media [Member] \| Class C Ordinary Shares [Member] \| Virgin Media Merger Agreement [Member]
Business Acquisition [Line Items]
Acquired entity shares received of acquiring entity (in shares)	0.6438
Virgin Media [Member] \| Common Stock [Member]
Business Acquisition [Line Items]
Common stock, outstanding (in shares)	272,013,333
Liberty Global [Member] \| Class A Ordinary Shares [Member]
Business Acquisition [Line Items]
Common stock, issued (in shares)	141,234,331
Liberty Global [Member] \| Class A Ordinary Shares [Member] \| Virgin Media Merger Agreement [Member]
Business Acquisition [Line Items]
Acquired entity shares received of acquiring entity (in shares)	1
Liberty Global [Member] \| Class B Ordinary Shares [Member]
Business Acquisition [Line Items]
Common stock, issued (in shares)	10,176,295
Liberty Global [Member] \| Class B Ordinary Shares [Member] \| Virgin Media Merger Agreement [Member]
Business Acquisition [Line Items]
Acquired entity shares received of acquiring entity (in shares)	1
Liberty Global [Member] \| Class C Ordinary Shares [Member]
Business Acquisition [Line Items]
Common stock, issued (in shares)	362,556,220
Liberty Global [Member] \| Class C Ordinary Shares [Member] \| Virgin Media Merger Agreement [Member]
Business Acquisition [Line Items]
Acquired entity shares received of acquiring entity (in shares)	1
Liberty Global [Member] \| Series A Common Stock [Member]
Business Acquisition [Line Items]
Share price (in dollar/euro per share)	$ 38.94
Liberty Global [Member] \| Series C Common Stock [Member]
Business Acquisition [Line Items]
Share price (in dollar/euro per share)	$ 36.37