Discontinued Operations - Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014 Discontinued Operations [Member]	Apr. 30, 2013 Discontinued Operations [Member]	Apr. 30, 2014 Discontinued Operations [Member]	Apr. 30, 2013 Discontinued Operations [Member]	Jul. 31, 2013 MONACO	Apr. 30, 2013 Mahindra [Member]
Statements of Operations for Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses									$ 19	$ 33
Asset impairment charges	151	0	169	0					24
Sales and revenues, net					0	36	0	70
Income (loss) before income taxes					1	(21)	2	(30)
Income tax benefit (expense)					0	0	0	0
Income (loss) from discontinued operations, net of tax	1	(21)	2	(30)	1	(21)	2	(30)
Gain (Loss) on Disposition of Business										$ 26