Stockholders’ Deficit - Taxes Related to Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax benefit (provision) on other comprehensive (loss) income	$ 1	$ (42)	$ (80)
Net unrealized gains on available-for-sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax benefit (provision) on change arising during the period	0	0	1
Tax effect on change in unrealized components of cash flow hedges:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax benefit (provision) on change arising during the period	20
Tax (provision) benefit on reclassifications during the period	28
Tax benefit (provision) on other comprehensive (loss) income	48
Tax effect on change in unrealized components of cash flow hedges:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax benefit (provision) on change arising during the period		(37)	(42)
Tax (provision) benefit on reclassifications during the period		46	(26)
Tax benefit (provision) on other comprehensive (loss) income		9	(68)
Tax effect on change in unrealized components of defined benefit plans:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax benefit (provision) on other comprehensive (loss) income	(49)	(51)	(13)
Tax benefit on losses arising during the period
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax benefit (provision) on change arising during the period	11	64	0
Tax provision on amortization of actuarial loss and prior service benefit
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax (provision) benefit on reclassifications during the period	(19)	(11)	(11)
Tax provision on curtailments, settlements and other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax (provision) benefit on reclassifications during the period	(41)	(104)	(2)
Tax effect on change in cumulative translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax benefit (provision) on other comprehensive (loss) income	$ 2	$ 0	$ 0