Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	6 Months Ended
Apr. 30, 2019	Oct. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross	$ 1,019	$ 713
Accumulated Amortization	318	260
Total	701	453
Customer contracts, customer lists and distribution agreements
Finite-Lived Intangible Assets [Line Items]
Gross	391	112
Accumulated Amortization	105	88
Total	$ 286	24
Weighted-Average Useful Life	9 years
Developed and core technology and patents
Finite-Lived Intangible Assets [Line Items]
Gross	$ 628	601
Accumulated Amortization	213	172
Total	$ 415	$ 429
Weighted-Average Useful Life	7 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Publisher FASB
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