Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2019	Oct. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross	$ 1,013	$ 713
Accumulated Amortization	289	260
Total	724	453
Customer contracts, customer lists and distribution agreements
Finite-Lived Intangible Assets [Line Items]
Gross	386	112
Accumulated Amortization	97	88
Total	$ 289	24
Weighted-Average Useful Life	9 years
Developed and core technology and patents
Finite-Lived Intangible Assets [Line Items]
Gross	$ 627	601
Accumulated Amortization	192	172
Total	$ 435	$ 429
Weighted-Average Useful Life	7 years