Goodwill - 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, 2013		Oct. 31, 2012		Oct. 31, 2011
Goodwill [Roll Forward]
Goodwill at Beginning of Period			$ 280		$ 319		$ 324
Impairments			(81)		0		0
Currency translation			(12)		(33)		2
Adjustments			3	[1]	6	[1]	7	[1]
Goodwill at End of Period	184		184		280		319
NA Truck [Member]
Goodwill [Roll Forward]
Goodwill at Beginning of Period			82		82		82
Impairments	77	4	(81)
Currency translation			0		0		0
Adjustments			1	[1]	0	[1]	0	[1]
Goodwill at End of Period	0		0		82		82
NA Parts [Member]
Goodwill [Roll Forward]
Goodwill at Beginning of Period			38		38		38
Impairments			0
Currency translation			0		0		0
Adjustments			0	[1]	0	[1]	0	[1]
Goodwill at End of Period	38		38		38		38
Global [Member]
Goodwill [Roll Forward]
Goodwill at Beginning of Period			160		199		204
Impairments			0
Currency translation			(12)		(33)		2
Adjustments			2	[1]	6	[1]	7	[1]
Goodwill at End of Period	$ 146		$ 146		$ 160		$ 199

[1] (A)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.