Goodwill and Other Intangible assets, Net Changes in Carrying Amounts of Goodwill (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Oct. 31, 2013	Apr. 30, 2013	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Goodwill [Roll Forward]
Goodwill			$ 184	$ 280	$ 319
Goodwill, Translation Adjustments			(4)	(12)	(33)
Goodwill, Subsequent Recognition of Deferred Tax Asset				(3)	(6)	[1]
Goodwill, Impairment Loss			(142)	(81)
Goodwill	184		38	184	280
North America Truck [Member]
Goodwill [Roll Forward]
Goodwill			0	82	82
Goodwill, Translation Adjustments			0	0	0
Goodwill, Subsequent Recognition of Deferred Tax Asset				(1)	0	[1]
Goodwill, Impairment Loss	77	4	0	(81)
Goodwill	0		0	0	82
North America Parts [Member]
Goodwill [Roll Forward]
Goodwill			38	38	38
Goodwill, Translation Adjustments			0	0	0
Goodwill, Subsequent Recognition of Deferred Tax Asset				0	0	[1]
Goodwill, Impairment Loss			0	0
Goodwill	38		38	38	38
Global Operations [Member]
Goodwill [Roll Forward]
Goodwill			146	160	199
Goodwill, Translation Adjustments			(4)	(12)	(33)
Goodwill, Subsequent Recognition of Deferred Tax Asset				(2)	(6)	[1]
Goodwill, Impairment Loss			(142)	0
Goodwill	$ 146		$ 0	$ 146	$ 160

[1] Adjustments to goodwill primarily result from the tax benefit attributable to the amortization of tax deductible goodwill in excess of goodwill recorded for financial statement purposes as measured in the IIAA balance sheet immediately after its acquisition in 2005.