Stockholders' Deficit - Schedule of Tax Effects Related to Other Comprehensive (Loss) Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Components of accumulated other comprehensive income, net of taxes
Tax benefit (provision) on other comprehensive (loss) income	$ 104	$ (63)	$ 71	$ (65)
Net unrealized gains (losses) on cash flow hedges
Components of accumulated other comprehensive income, net of taxes
Tax effects on change arising during the period	83		34
Tax effects on reclassification into earnings	25		51
Tax benefit (provision) on other comprehensive (loss) income	108		85
Net unrealized gains (losses) on cash flow hedges
Components of accumulated other comprehensive income, net of taxes
Tax effects on change arising during the period		(7)		(23)
Tax effects on reclassification into earnings		14		34
Tax benefit (provision) on other comprehensive (loss) income		7		11
Tax benefit on losses arising during the period
Components of accumulated other comprehensive income, net of taxes
Tax effects on change arising during the period	1	4	1	5
Tax provision on amortization of actuarial loss and prior service benefit
Components of accumulated other comprehensive income, net of taxes
Tax effects on reclassification into earnings	(5)	(3)	(15)	(9)
Tax provision on curtailments, settlements and other
Components of accumulated other comprehensive income, net of taxes
Tax effects on reclassification into earnings	0	(79)	0	(78)
Tax effects on change in unrealized components of defined benefit plans
Components of accumulated other comprehensive income, net of taxes
Tax benefit (provision) on other comprehensive (loss) income	(4)	(78)	(14)	(82)
Change in cumulative translation adjustment
Components of accumulated other comprehensive income, net of taxes
Tax benefit (provision) on other comprehensive (loss) income	$ 0	$ 8	$ 0	$ 6