Stockholders' Deficit - Schedule of Tax Effects Related to Other Comprehensive (Loss) Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Components of accumulated other comprehensive income, net of taxes
Tax provision on other comprehensive income (loss)	$ (22)	$ (42)	$ (33)	$ (2)
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	(33)		(49)
Tax effects on reclassification into earnings	16		26
Tax provision on other comprehensive income (loss)	(17)		(23)
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		(36)		(16)
Tax effects on reclassification into earnings		(2)		20
Tax provision on other comprehensive income (loss)		(38)		4
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	0	1	0	1
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)	(10)	(6)
Tax benefit on curtailments, settlements and other
Components of accumulated other comprehensive income, net of taxes
Tax effects on reclassification into earnings	0	0	0	1
Tax effects on change in unrealized components of defined benefit plans
Components of accumulated other comprehensive income, net of taxes
Tax provision on other comprehensive income (loss)	(5)	(2)	(10)	(4)
Change in cumulative translation adjustment
Components of accumulated other comprehensive income, net of taxes
Tax provision on other comprehensive income (loss)	$ 0	$ (2)	$ 0	$ (2)