Restructuring and Other Charges - Fiscal 2015 Plan Narrative (Details) employee in Thousands	3 Months Ended	9 Months Ended
	Jul. 31, 2016 USD ($)	Jul. 31, 2016 USD ($) employee	Sep. 14, 2015 USD ($)
Fiscal 2015 Plan
Restructuring Cost and Reserve [Line Items]
Completion date		Oct. 31, 2016
Total expected costs to be incurred	$ 300,000,000	$ 300,000,000
Expected positions to be eliminated | employee		3
Restructuring and other charges	$ 28,000,000	$ 134,000,000
Fiscal 2015 Plan | Maximum
Restructuring Cost and Reserve [Line Items]
Total expected costs to be incurred			$ 300,000,000
Voluntary Phased Retirement Program (PRP)
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges		$ 29,000,000