Overview and Summary of Significant Accounting Policies (Details 4) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Movement in restricted cash	$ 191	$ 442
Accounting Standards Update 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Effect of new accounting principle			$ 2,300
Accounting Standards Update 2017-07 | Cost of products and services
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net benefit cost	61	25
Accounting Standards Update 2017-07 | Research and development
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net benefit cost	4	4
Accounting Standards Update 2017-07 | Selling, general and administrative
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net benefit cost	70	6
Accounting Standards Update 2017-07 | Restructuring charges and transformation costs
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net benefit cost	(14)	26
Accounting Standards Update 2017-07 | Other Nonoperating Income (Expense)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net benefit cost	$ 121	$ 61