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v3.21.1

Share-based Compensation (Narrative) (Details) | Mar. 31, 2021
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Share-based Payment Arrangement [Abstract] |
Percent of annual incentive compensation receivable in shares | 100.00%

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- Definition Shareholder Inventive Program, Percent of Annual Incentive Compensation + References No definition available. + Details
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Namespace Prefix: | lbtya_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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