Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jul. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016	Apr. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset impairment charges	$ 6		$ 12	$ 13	$ 17
Goodwill	38	$ 38		38
Cash and Cash Equivalents, Maturity Term		90 days
Marketable Securities, Maturity Term		90 days
North America Truck [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset impairment charges	$ 1		$ 11	$ 8	$ 16
Tax Exempt Bond [Member] | Manufacturing Operations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.50%			6.50%		6.50%