Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Major components of assets and liabilities included in distribution
Loss from discontinued operations, net of taxes	$ 0	$ (31)	$ 0	$ (89)
Hewlett-Packard Enterprise \| Spinoff
Major components of assets and liabilities included in distribution
Expenses	0	41	0	128
Interest and other, net	0	(17)	29	(17)
Earnings (Loss) from discontinued operations before taxes	0	(58)	29	(145)
(Provision for) Benefit from taxes(2)	0	27	(29)	56
Loss from discontinued operations, net of taxes	$ 0	$ (31)	$ 0	$ (89)

Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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- Definition

Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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