Debt - Debt and Lease Covenants (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Debt Instrument [Line Items]
Payments to subsidiary to meet convenant requirement	$ 0	$ 0	$ 0
Navistar Financial Corporation [Member]
Debt Instrument [Line Items]
Fixed charge coverage ratio	125.00%