Restructuring and Other Charges - Fiscal 2012 Plan (Details) - Fiscal 2012 Plan $ in Millions	3 Months Ended	9 Months Ended
Jul. 31, 2016 USD ($)	Jul. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Completion date		Oct. 31, 2021
Severance charges	$ 3	$ 5
Accrued restructuring charges	10	10
Other charges	$ 5	$ 17

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Date the exit and disposal activities were completed or are expected to be completed, in CCYY-MM-DD format.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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