Financial Instruments and Commodity Contracts - Balance Sheet Location (Details) (USD $) In Millions, unless otherwise specified	Apr. 30, 2013	Oct. 31, 2012
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives	$ 2	$ 0
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives	5	5
Commodity Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives	0	0
Commodity Contract [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives	4	3
Commodity Contract [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives	2	0
Commodity Contract [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability derivatives	$ 1	$ 2