Debt instrument maturity year.

No definition available.

Name:	nlsnnv_DebtInstrumentMaturityYear
Namespace Prefix:	nlsnnv_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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

- 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=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
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

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

- Details

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

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=nlsnnv_LiborOrEuroLiborBasedVariableRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

Name:	us-gaap_VariableRateAxis=nlsnnv_EuroLiborBasedVariableRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

Long-term Debt and Other Financing Arrangements - Summary of Long-Term Debt (Parenthetical) (Detail) € in Millions, $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jun. 30, 2015 EUR (€)	Dec. 31, 2014 EUR (€)
Senior Secured Term Loan Facility Due 2019 \| Libor Based Variable Rate
Debt Instrument [Line Items]
Debt instrument face value	$ 1,580	$ 1,580
Debt instrument, variable rate	2.18%	2.18%
Debt instrument, maturity year	2019	2019
Senior Secured Term Loan Facility Due 2019 \| Euro LIBOR or LIBOR Based Variable Rate
Debt Instrument [Line Items]
Debt instrument face value		$ 575
Debt instrument, maturity year		2019
Senior Secured Term Loan Due 2017 \| Libor Based Variable Rate
Debt Instrument [Line Items]
Debt instrument face value	$ 500	$ 500
Debt instrument, variable rate	2.43%	2.43%
Debt instrument, maturity year	2017	2017
Senior Secured Term Loan Facility Due 2021 \| Libor Based Variable Rate
Debt Instrument [Line Items]
Debt instrument face value	$ 1,100	$ 1,100
Debt instrument, variable rate	3.18%	3.18%
Debt instrument, maturity year	2021	2021
Senior Secured Term Loan Facility Due 2021 \| Euro Libor Based Variable Rate
Debt Instrument [Line Items]
Debt instrument face value \| €			€ 286	€ 286
Debt instrument, variable rate	2.93%	2.93%
Debt instrument, maturity year	2021	2021
Senior Debenture Loan Due 2020
Debt Instrument [Line Items]
Debt instrument face value	$ 800	$ 800
Debt instrument interest rate stated percentage	4.50%		4.50%
Debt instrument, maturity year	2020
Senior Debenture Loan Due 2022
Debt Instrument [Line Items]
Debt instrument face value	$ 2,300	1,550
Debt instrument interest rate stated percentage	5.00%		5.00%
Debt instrument, maturity year	2022
Senior Debenture Loan Due 2021
Debt Instrument [Line Items]
Debt instrument face value	$ 625	$ 625
Debt instrument interest rate stated percentage	5.50%		5.50%
Debt instrument, maturity year	2021