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

No definition available.

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- Definition

Debt Instrument, Floor Interest Rate

+ References

No definition available.

+ Details

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- Definition

Payments For Debt Redemption Premium

+ References

No definition available.

+ Details

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- Definition

Write-off of Unamortized Debt Discount (Premium)

+ References

No definition available.

+ Details

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

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-Name Accounting Standards Codification
-Topic 835
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-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

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- Definition

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

+ 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(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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.

+ References

No definition available.

+ Details

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- 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

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- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

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-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629

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- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Details

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Debt and Capital Lease Obligations (Virgin Media Refinancing Transaction) (Details) $ in Millions		1 Months Ended			3 Months Ended
	Mar. 21, 2017 USD ($)	Feb. 15, 2017 GBP (£)	Jan. 31, 2017 GBP (£)	Jan. 31, 2017 USD ($)	Mar. 31, 2017	Jan. 15, 2021	Mar. 21, 2017 GBP (£)	Mar. 21, 2017 USD ($)	Feb. 15, 2017 USD ($)	Jan. 31, 2017 USD ($)
Senior Notes [Member] \| 2025 VM Variable Sterling Senior Secured Notes [Member]
Debt Instrument [Line Items]
Principal amount of debt							£ 521,300,000	$ 653.8
Interest rate							6.00%	6.00%
Virgin Media Secured Finance [Member] \| Senior Notes [Member] \| April 2027 VM Senior Secured Notes [Member]
Debt Instrument [Line Items]
Principal amount of debt			£ 675,000,000.0							$ 846.6
Interest rate			5.00%							5.00%
Additional basis points used to determine redemption premium			50.00%							50.00%
Virgin Media Secured Finance [Member] \| Senior Notes [Member] \| April 2027 VM Senior Secured Notes [Member] \| 2022
Debt Instrument [Line Items]
Redemption price					102.50%
Virgin Media Secured Finance [Member] \| Senior Notes [Member] \| April 2027 VM Senior Secured Notes [Member] \| 2023
Debt Instrument [Line Items]
Redemption price					101.25%
Virgin Media Secured Finance [Member] \| Senior Notes [Member] \| April 2027 VM Senior Secured Notes [Member] \| 2024
Debt Instrument [Line Items]
Redemption price					100.625%
Virgin Media Secured Finance [Member] \| Senior Notes [Member] \| April 2027 VM Senior Secured Notes [Member] \| 2025 and thereafter
Debt Instrument [Line Items]
Redemption price					100.00%
Virgin Media Secured Finance [Member] \| Senior Notes [Member] \| 2025 VM Variable Sterling Senior Secured Notes [Member]
Debt Instrument [Line Items]
Additional basis points used to determine redemption premium					0.50%
Virgin Media Secured Finance [Member] \| Senior Notes [Member] \| 2025 VM Variable Sterling Senior Secured Notes [Member] \| 2021
Debt Instrument [Line Items]
Redemption price					105.00%
Virgin Media Secured Finance [Member] \| Senior Notes [Member] \| 2025 VM Variable Sterling Senior Secured Notes [Member] \| 2022
Debt Instrument [Line Items]
Redemption price					102.50%
Virgin Media Secured Finance [Member] \| Senior Notes [Member] \| 2025 VM Variable Sterling Senior Secured Notes [Member] \| 2023
Debt Instrument [Line Items]
Redemption price					100.00%
Virgin Media Secured Finance [Member] \| Medium-term Notes [Member] \| VM Credit Facility J [Member]
Debt Instrument [Line Items]
Principal amount of debt		£ 865,000,000.0							$ 1,084.9
Virgin Media Secured Finance [Member] \| Medium-term Notes [Member] \| VM Credit Facility J [Member] \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		3.50%
Floor rate		0.00%							0.00%
Long-term Debt [Member] \| April 2021 VM Sterling Senior Secured Notes [Member]
Debt Instrument [Line Items]
Extinguishment of debt			£ 640,000,000.0	$ 802.7
Long-term Debt [Member] \| VM Credit Facility E [Member]
Debt Instrument [Line Items]
Extinguishment of debt			£ 849,400,000	1,065.3
Long-term Debt [Member] \| January 2021 VM Sterling Senior Secured Notes [Member]
Debt Instrument [Line Items]
Principal amount of debt							£ 521,300,000	$ 653.8
Long-term Debt [Member] \| Virgin Media [Member] \| April 2021 VM Sterling Senior Secured Notes [Member]
Debt Instrument [Line Items]
Loss (gain) on debt modification and extinguishment				39.9
Payments for debt redemption premium				32.6
Write-off of deferred financing costs				7.3
Long-term Debt [Member] \| Virgin Media [Member] \| VM Credit Facility E [Member]
Debt Instrument [Line Items]
Loss (gain) on debt modification and extinguishment				2.4
Write-off of deferred financing costs				2.0
Write-off of unamortized debt discount (premium)				$ 0.4
Long-term Debt [Member] \| Virgin Media [Member] \| January 2021 VM Sterling Senior Secured Notes [Member]
Debt Instrument [Line Items]
Loss (gain) on debt modification and extinguishment	$ (5.7)
Write-off of deferred financing costs	1.3
Write-off of unamortized debt discount (premium)	$ (7.0)
Scenario, Forecast [Member] \| Senior Notes [Member] \| 2025 VM Variable Sterling Senior Secured Notes [Member]
Debt Instrument [Line Items]
Interest rate						11.00%