v3.3.1.900

Derivative Instruments (Realized and Unrealized Gains (Losses) on Derivatives) (Schedule) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Derivative [Line Items] |  |  |
Gain (loss) on derivative instruments, net | $ 88.8 | $ (1,020.4) | $ (1,070.3)
Cross Currency Interest Rate Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Gain (loss) on derivative instruments, net | 293.6 | (586.5) | (958.3)
Equity-related derivative instruments [Member] |  |  |
Derivative [Line Items] |  |  |
Gain (loss) on derivative instruments, net | (236.3) | (362.3) | (109.0)
Foreign currency forward contracts [Member] |  |  |
Derivative [Line Items] |  |  |
Gain (loss) on derivative instruments, net | 31.6 | (72.9) | (6.0)
Other Contract [Member] |  |  |
Derivative [Line Items] |  |  |
Gain (loss) on derivative instruments, net | (0.1) | 1.3 | 3.0
Sumitomo Collar [Member] | Equity-related derivative instruments [Member] |  |  |
Derivative [Line Items] |  |  |
Gain (loss) on derivative instruments, net | (46.0) | (206.4) | (109.0)
Ziggo Collar [Member] | Equity-related derivative instruments [Member] |  |  |
Derivative [Line Items] |  |  |
Gain (loss) on derivative instruments, net | (113.3) | (152.5) | 0.0
ITV Collar [Member] | Equity-related derivative instruments [Member] |  |  |
Derivative [Line Items] |  |  |
Gain (loss) on derivative instruments, net | (77.4) | 0.0 | 0.0
Virgin Media Capped Call [Member] | Equity-related derivative instruments [Member] |  |  |
Derivative [Line Items] |  |  |
Gain (loss) on derivative instruments, net | $ 0.4 | $ (3.4) | $ 0.0

X
- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
Name: | us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CrossCurrencyInterestRateContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_EquityContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeForwardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_OtherContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeByNatureAxis=lbtya_SumitomoCollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeByNatureAxis=lbtya_ZiggoCollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeByNatureAxis=lbtya_ITVCollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeByNatureAxis=lbtya_VirginMediaCappedCallMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |