Discontinued Operations - Schedule of Discontinued Operations, Significant Non-Cash Items and Capital Expenditures (Details) - Everett Transaction - Discontinued Operations, Disposed of by Means Other than Sale, Spinoff - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation and amortization	$ 0	$ 349	$ 387	$ 1,071
Purchases of property, plant and equipment	$ 0	$ 142	$ 131	$ 240