Segment Reporting - Summary of Segment Long Lived Assets and Revenue (Details) - USD ($) $ in Millions	3 Months Ended							12 Months Ended
	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales and revenues, net	$ 2,213	$ 2,096	$ 1,663	$ 2,063	$ 2,086	$ 2,197	$ 1,765	$ 8,570	$ 8,111	$ 10,140
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets				999				1,068	999
Sales and revenues, net								6,344	6,186	7,699
Other Countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets				8				9	8
Sales and revenues, net								573	506	631
CANADA
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets				20				11	20
Sales and revenues, net								708	604	774
MEXICO
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets				202				226	202
Sales and revenues, net								708	575	653
BRAZIL
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets				$ 103				90	103
Sales and revenues, net								237	240	383
Truck
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales and revenues, net								5,706	5,176	6,845
Financial Services Operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales and revenues, net								142	136	145
Parts
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales and revenues, net								2,177	2,216	2,399
Engine
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales and revenues, net								545	583	751
Financial Services Operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Investment Income, Interest								165	167	175
Sales and revenues, net								$ 235	235	241
Reclassification of Sales | Other Countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales and revenues, net									$ 103	$ 23