Fair Value Measurements Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended			9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013	Jan. 31, 2014 NA Truck [Member]	Jul. 31, 2014 NA Truck [Member]	Jan. 31, 2014 Amortizing Intangible Assets and Long-Lived Assets [Domain] NA Truck [Member]	Jul. 31, 2014 Brazilian Reporting Unit [Member]	Apr. 30, 2014 Brazilian Reporting Unit [Member]	Jul. 31, 2013 Brazilian Reporting Unit [Member]	Jul. 31, 2014 Brazilian Reporting Unit [Member]	Jul. 31, 2013 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								$ 0	$ 142	$ 0	$ 142	$ 0
Indefinite-Lived Intangible Assets (Excluding Goodwill)									43
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)								0	7	0	7	0
Other Assets							18
Asset impairment charges	$ 4	$ 17	$ 173	$ 17	$ 18	$ 19			$ 149