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Derivative Instruments (Net Cash Received (Paid) Related to Derivatives) (Schedule) (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Operating activities | $ 58.1 | $ 56.0
Financing activities | (1.5) | (62.1)
Total | $ 56.6 | $ (6.1)

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- 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

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- Definition Proceeds (Repayments) From Derivatives, Continuing Operations + References No definition available. + Details
Name: | lbtya_ProceedsRepaymentsFromDerivativesContinuingOperations
Namespace Prefix: | lbtya_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- 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 No definition available. + Details
Name: | us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration