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Restructuring and Impairments - Schedule of Restructuring Charges (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 42us-gaap_RestructuringCharges	$ 25us-gaap_RestructuringCharges	$ 107us-gaap_RestructuringCharges
Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	42	25	108
Discontinued Operations [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0	$ 0	$ 1

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References+ Details