Fair Value Measurements Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013	Jan. 31, 2014 NA Truck [Member]	Apr. 30, 2014 NA Truck [Member]	Apr. 30, 2014 Brazilian Reporting Unit [Member]	Apr. 30, 2014 Brazilian Reporting Unit [Member]	Jan. 31, 2014 Brazilian Reporting Unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Maturity Term			90 days
Marketable Securities, Maturity Term			90 days
Goodwill, Impairment Loss							$ 142	$ 142
Indefinite-Lived Intangible Assets (Excluding Goodwill)									43
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)							7	7
Other Assets					18
Asset impairment charges	$ 151	$ 0	$ 169	$ 0	$ 18	$ 19	$ 149