Debt Instrument, Fair Value Adjustment Due To Acquisition, Amount

No definition available.

Name:	lbtya_DebtInstrumentFairValueAdjustmentDueToAcquisitionAmount
Namespace Prefix:	lbtya_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Deferred License Fees

+ References

No definition available.

+ Details

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

- Definition

Long Term Debt, Operating Related Additions

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

+ Details

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

- Definition

Face (par) amount of debt instrument at time of issuance.

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- 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.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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Balance Type:	credit
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- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

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

Debt (Component of Debt-Footnotes) (Details) € in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2026 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2026 EUR (€)	Jul. 31, 2026 USD ($)	Jul. 31, 2026 EUR (€)	May 31, 2026 USD ($)	May 31, 2026 EUR (€)	Feb. 28, 2026 USD ($)	Feb. 28, 2026 EUR (€)	Jan. 31, 2026 USD ($)	Jan. 31, 2026 EUR (€)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Weighted average interest rate	5.07%		5.07%
Unused borrowing capacity, amount	$ 1,706.6
Deferred liabilities	400.4											$ 423.4
Carrying amount	21,771.9											8,584.8
Trade accounts receivable
Debt Instrument [Line Items]
Secured debt	184.4											228.4
Long-term Debt
Debt Instrument [Line Items]
Estimated fair value	$ 20,400.0											8,600.0
Aggregate Variable and Fixed Rate Indebtedness
Debt Instrument [Line Items]
Weighted average interest rate	4.28%		4.28%
VodafoneZiggo Credit Facility
Debt Instrument [Line Items]
Weighted average interest rate	6.13%		6.13%
Carrying amount	$ 3,054.0
VodafoneZiggo Credit Facility \| VodafoneZiggo Revolving Facility
Debt Instrument [Line Items]
Unused borrowing capacity, amount	$ 907.2		€ 800.0
Wyre Facilities
Debt Instrument [Line Items]
Weighted average interest rate	4.86%		4.86%
Carrying amount	$ 3,389.4
Wyre Facilities \| Line of credit
Debt Instrument [Line Items]
Borrowings repaid	$ 1,033.0		€ 911.0
Wyre DSR Facility
Debt Instrument [Line Items]
Borrowings repaid						$ 266.5	€ 235.0
Wyre Revolving Facility
Debt Instrument [Line Items]
Borrowings repaid						$ 243.8	€ 215.0
Telenet Credit Facility
Debt Instrument [Line Items]
Weighted average interest rate	5.06%		5.06%
Carrying amount	$ 2,267.9											4,748.0
Telenet Credit Facility \| VodafoneZiggo Revolving Facility
Debt Instrument [Line Items]
Unused borrowing capacity, amount	686.0		€ 605.0
Telenet Revolving Facility I
Debt Instrument [Line Items]
Unused borrowing capacity, amount	657.7		580.0					$ 623.7	€ 550.0
Telenet Revolving Facility I \| Revolving Credit Facility
Debt Instrument [Line Items]
Borrowings repaid										$ 102.1	€ 90.0
Telenet Overdraft Facility
Debt Instrument [Line Items]
Unused borrowing capacity, amount	28.3		25.0
Telenet Revolving Facility
Debt Instrument [Line Items]
Unused borrowing capacity, amount	$ 22.7		€ 20.0
VM Ireland Credit Facility
Debt Instrument [Line Items]
Weighted average interest rate	5.92%		5.92%
Unused borrowing capacity, amount	$ 113.4		€ 100.0
Carrying amount	1,020.6											1,056.2
VM Ireland Credit Facility \| VodafoneZiggo Revolving Facility
Debt Instrument [Line Items]
Unused borrowing capacity, amount	$ 113.4		€ 100.0
Vendor Financing
Debt Instrument [Line Items]
Weighted average interest rate	3.82%		3.82%
Operating-related vendor financing additions	$ 443.2	$ 251.6
Carrying amount	1,489.8	$ 391.0										365.9	$ 355.9
Financing Facility \| Line of credit \| Liberty Global Europe Holdings BV
Debt Instrument [Line Items]
Principal amount				$ 340.2	€ 300.0
Egg Power Capex Facility \| Secured debt
Debt Instrument [Line Items]
Carrying amount	92.9											19.8
Formula E
Debt Instrument [Line Items]
Secured debt	56.7											$ 58.7
VodafoneZiggo Acquisition
Debt Instrument [Line Items]
Fair value adjustment	$ 1,100.0