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

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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

+ 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

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: 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 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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

+ Details

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

- 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.

+ 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 210.5-02.19(b),22(b))

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

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ 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 210.5-02.19(b),22(b))

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

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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

Debt and Capital Lease Obligations (Telenet Credit Facility) (Details) € in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2015 USD ($)	Jul. 01, 2015 EUR (€)	Jul. 01, 2015 USD ($)
Telenet Credit Facility M [Member]
Debt Instrument [Line Items]
Interest rate	6.375%
Facility amount	$ 500.0
Unused borrowing capacity	0.0
Carrying value	$ 557.7
Telenet Credit Facility O [Member]
Debt Instrument [Line Items]
Interest rate	6.625%
Facility amount	$ 300.0
Unused borrowing capacity	0.0
Carrying value	334.6
Telenet Credit Facility P [Member]
Debt Instrument [Line Items]
Facility amount	400.0
Unused borrowing capacity	0.0
Carrying value	$ 446.1
Telenet Credit Facility P [Member] \| EURIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	3.875%
Telenet Credit Facility S [Member]
Debt Instrument [Line Items]
Facility amount	$ 36.9
Unused borrowing capacity	41.1
Carrying value	$ 0.0
Fee on unused portion of credit facility	1.10%
Telenet Credit Facility S [Member] \| Subsequent Event [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Facility amount			$ 11.2
Telenet Credit Facility S [Member] \| EURIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%
Telenet Credit Facility U [Member]
Debt Instrument [Line Items]
Interest rate	6.25%
Facility amount	$ 450.0
Unused borrowing capacity	0.0
Carrying value	$ 501.9
Telenet Credit Facility V [Member]
Debt Instrument [Line Items]
Interest rate	6.75%
Facility amount	$ 250.0
Unused borrowing capacity	0.0
Carrying value	278.8
Telenet Credit Facility W [Member]
Debt Instrument [Line Items]
Facility amount	474.1
Unused borrowing capacity	0.0
Carrying value	$ 527.7
Telenet Credit Facility W [Member] \| EURIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	3.25%
Telenet Credit Facility X [Member]
Debt Instrument [Line Items]
Facility amount	$ 286.0
Unused borrowing capacity	319.0
Carrying value	$ 0.0
Fee on unused portion of credit facility	1.10%
Telenet Credit Facility X [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Facility amount		€ 95.0	106.0
Telenet Credit Facility X [Member] \| EURIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%
Telenet Credit Facility X2 [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Facility amount		85.0	$ 94.8
Telenet Credit Facility X2 [Member] \| Subsequent Event [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Facility amount \| €		€ 10.0
Telenet Credit Facility Y [Member]
Debt Instrument [Line Items]
Facility amount	$ 882.9
Unused borrowing capacity	0.0
Carrying value	$ 982.8
Telenet Credit Facility Y [Member] \| EURIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	3.50%
Telenet Credit Facility Z [Member]
Debt Instrument [Line Items]
Facility amount	$ 200.0
Carrying value	$ 0.0
Fee on unused portion of credit facility	0.80%
Telenet Credit Facility Z [Member] \| EURIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Telenet Credit Facility AA [Member]
Debt Instrument [Line Items]
Facility amount	$ 800.0
Carrying value	$ 0.0
Telenet Credit Facility AA [Member] \| EURIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	3.50%
Elimination of Telenet Facilities M, O, P, U and V in Consolidation [Member]
Debt Instrument [Line Items]
Unused borrowing capacity	$ 0.0
Carrying value	(2,119.1)
Telenet Credit Facility [Member]
Debt Instrument [Line Items]
Unused borrowing capacity	360.1
Carrying value	$ 1,510.5