Segment Reporting - Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Apr. 30, 2015	Jan. 31, 2015	Apr. 30, 2014	Apr. 30, 2015 segments	Apr. 30, 2014
Segment Reporting Information [Line Items]
Number Of Segments				4
Intersegment sales and revenues	$ 0	$ 35	$ 0	$ 0	$ 0
Sales and revenues, net	2,693		2,746	5,114	4,954
North America Truck [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues	33		60	72	120
Sales and revenues, net	1,966		1,889	3,636	3,340
North America Parts [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues	6		16	18	28
Sales and revenues, net	613		630	1,239	1,216
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues	(79)		(101)	(168)	(197)
Sales and revenues, net	(76)		(101)	(163)	(197)
Restatement Adjustment [Member] | North America Truck [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues		39
Sales and revenues, net		1,670
Restatement Adjustment [Member] | Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Intersegment sales and revenues		(89)
Sales and revenues, net		$ (87)