Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	9 Months Ended
	Jul. 31, 2019	Oct. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross	$ 1,009	$ 713
Accumulated Amortization	346	260
Total	663	453
Customer contracts, customer lists and distribution agreements
Finite-Lived Intangible Assets [Line Items]
Gross	375	112
Accumulated Amortization	113	88
Total	$ 262	24
Weighted-Average Useful Life	9 years
Developed and core technology and patents
Finite-Lived Intangible Assets [Line Items]
Gross	$ 634	601
Accumulated Amortization	233	172
Total	$ 401	$ 429
Weighted-Average Useful Life	7 years