Revenue - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020	Oct. 31, 2020
Extended warranty contracts
Disaggregation of Revenue [Line Items]
Deferred revenue related to extended warranty contract	$ 229		$ 229		$ 245
Sales of manufactured products, net	$ 26	$ 26	$ 58	$ 51
Minimum
Disaggregation of Revenue [Line Items]
Warranty revenue related to extended warranty contracts term			1 year
Maximum
Disaggregation of Revenue [Line Items]
Warranty revenue related to extended warranty contracts term			10 years