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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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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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The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.

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Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Overview and Basis of Presentation - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Nov. 01, 2018
Segment Reporting Information [Line Items]
Net loss from discontinued operations	$ 0	$ 46
Movement in restricted cash		12
Increase of revenue in period	$ 8
Retained Earnings \| Accounting Standards Update 2016-16
Segment Reporting Information [Line Items]
Effect of new accounting pronouncement			$ 2,300
Other Income and Expense \| Accounting Standards Update 2017-07
Segment Reporting Information [Line Items]
Quantification of effect of new accounting pronouncement		(33)
Costs of Products and Services \| Accounting Standards Update 2017-07
Segment Reporting Information [Line Items]
Quantification of effect of new accounting pronouncement		(14)
Research and Development Expense \| Accounting Standards Update 2017-07
Segment Reporting Information [Line Items]
Quantification of effect of new accounting pronouncement		(1)
Selling, General and Administrative Expenses \| Accounting Standards Update 2017-07
Segment Reporting Information [Line Items]
Quantification of effect of new accounting pronouncement		(16)
Restructuring and Transformation Costs \| Accounting Standards Update 2017-07
Segment Reporting Information [Line Items]
Quantification of effect of new accounting pronouncement		$ (2)