Revenue - Performance Obligations (Details) $ in Millions	12 Months Ended
	Oct. 31, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 11,251
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected revenue	87
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected revenue	78
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected revenue	59
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected revenue	33
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected revenue	13
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected revenue	9
Extended Warranty Programs [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue from Contract with Customer, Including Assessed Tax	$ 113