Taxes on Earnings - Schedule of Domestic and Foreign Components of Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Domestic and foreign components of earnings (loss) before taxes
U.S.	$ 884	$ (1,021)	$ 242
Non-U.S.	2,347	3,544	2,771
Earnings before taxes	$ 3,231	$ 2,523	$ 3,013