Discontinued Operations - Schedule of Discontinued Operations, Financial Results (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net (loss) earnings from discontinued operations	$ (46)	$ 16
Everett Transaction | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenue	0	4,505
Cost of revenue	0	3,419
Expenses	51	1,076
Interest and other, net	(4)	0
(Loss) earnings from discontinued operations before taxes	(47)	10
Benefit for taxes	1	6
Net (loss) earnings from discontinued operations	$ (46)	$ 16