Financial Instruments and Commodity Contracts (Income Statement Location) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Apr. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized	$ 1	$ 7	$ (3)	$ 23
Cross Currency Interest Rate Contract [Member] | Other Income, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized	0	0	1	0
Foreign Currency Contract [Member] | Other Income, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized	1	2	(3)	1
Forward Contracts [Member] | Commodity Contract [Member] | Cost of Products Sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized	$ 0	$ 5	$ (1)	$ 22