Consolidated Statements of Stockholders’ Deficit Consolidated Statements of Stockholders' Deficit (Parenthetical) - USD ($) $ in Millions	12 Months Ended
Oct. 31, 2014	Oct. 31, 2013
Statement of Stockholders' Equity [Abstract]
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Tax	$ 16	$ 0
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Repurchase, Tax	$ 3

Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Repurchase, Tax

No definition available.

Name:	nav_AdjustmentstoAdditionalPaidinCapitalEquityComponentofConvertibleDebtRepurchaseTax
Namespace Prefix:	nav_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration