Fair Value Measurements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2014
Derivative Instruments Gain Loss [Line Items]
Pre-tax losses from accumulated other comprehensive loss to interest expense expected to be recognized in next twelve months	$ 13

Pretax losses from accumulated other comprehensive loss expected to be recognized in next twelve months.

No definition available.

Name:	nlsnnv_PretaxLossesFromAccumulatedOtherComprehensiveLossExpectedToBeRecognizedInNextTwelveMonths
Namespace Prefix:	nlsnnv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration