Additional basis points on discount rate used to calculate redemption premium on debt instrument.

No definition available.

Name:	lbtya_DebtInstrumentAdditionalBasisPointsonDiscountRateUsedtoCalculateRedemptionPremium
Namespace Prefix:	lbtya_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13476-108611

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=lbtya_TelenetFinanceVNotes625PercentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lbtya_TelenetFinanceVNotes675PercentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=lbtya_DebtInstrumentRedemptionPeriodSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=lbtya_DebtInstrumentRedemptionPeriodSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=lbtya_DebtInstrumentRedemptionPeriodEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt and Capital Lease Obligations (Telenet SPE Notes) (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Stated interest rate of debt	4.875%		4.875%
Outstanding principal amount		$ 45,781.2	$ 42,541.8
Estimated fair value			344.4
Carrying value		45,426.3	42,315.9
Telenet SPE Notes [Member]
Debt Instrument [Line Items]
Outstanding principal amount		2,097.2	1,297.3
Estimated fair value		2,155.8	1,383.9
Carrying value			$ 1,282.0
Redemption price	100.00%
Additional basis points used to determine redemption premium	50.00%		50.00%
Gains (losses) on extinguishment of debt		$ (34.3)
6.25% Telenet Finance V Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt	6.25%		6.25%
Outstanding principal amount	€ 450.0		$ 474.6
Estimated fair value			505.2
Carrying value			$ 468.4
6.25% Telenet Finance V Notes [Member] \| 2017
Debt Instrument [Line Items]
Redemption price	103.125%
6.25% Telenet Finance V Notes [Member] \| 2018
Debt Instrument [Line Items]
Redemption price	102.083%
6.25% Telenet Finance V Notes [Member] \| 2019
Debt Instrument [Line Items]
Redemption price	101.563%
6.25% Telenet Finance V Notes [Member] \| 2020
Debt Instrument [Line Items]
Redemption price	100.00%
6.25% Telenet Finance V Notes [Member] \| 2021
Debt Instrument [Line Items]
Redemption price	100.00%
6.75% Telenet Finance V Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt	6.75%		6.75%
Outstanding principal amount	€ 250.0		$ 263.7
Estimated fair value			293.5
Carrying value			$ 259.8
6.75% Telenet Finance V Notes [Member] \| 2018
Debt Instrument [Line Items]
Redemption price	103.375%
6.75% Telenet Finance V Notes [Member] \| 2019
Debt Instrument [Line Items]
Redemption price	102.531%
6.75% Telenet Finance V Notes [Member] \| 2020
Debt Instrument [Line Items]
Redemption price	101.688%
6.75% Telenet Finance V Notes [Member] \| 2021
Debt Instrument [Line Items]
Redemption price	100.844%
6.75% Telenet Finance V Notes [Member] \| 2022
Debt Instrument [Line Items]
Redemption price	100.00%
6.75% Telenet Finance V Notes [Member] \| 2023
Debt Instrument [Line Items]
Redemption price	100.00%
Telenet Finance VI Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt	4.875%		4.875%
Outstanding principal amount	€ 530.0		$ 559.0
Estimated fair value			585.2
Carrying value			$ 553.8
Telenet Finance VI Notes [Member] \| 2021
Debt Instrument [Line Items]
Redemption price	102.438%
Telenet Finance VI Notes [Member] \| 2022
Debt Instrument [Line Items]
Redemption price	101.219%
Telenet Finance VI Notes [Member] \| 2023
Debt Instrument [Line Items]
Redemption price	100.609%
Telenet Finance VI Notes [Member] \| 2024 and thereafter
Debt Instrument [Line Items]
Redemption price	100.00%