Stockholders' Deficit - Schedule of Tax Effects Related to Other Comprehensive (Loss) Income (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Components of accumulated other comprehensive income, net of taxes
Tax benefit (provision) on other comprehensive loss	$ 65	$ (14)
Tax effects on change in unrealized gains on available-for-sale securities
Components of accumulated other comprehensive income, net of taxes
Tax effects on change arising during the period	1	(1)
Tax benefit (provision) on other comprehensive loss	1	(1)
Tax effects on change in unrealized components of cash flow hedges
Components of accumulated other comprehensive income, net of taxes
Tax effects on change arising during the period	70	(3)
Tax effects on reclassification into earnings	(3)	4
Tax benefit (provision) on other comprehensive loss	67	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	(3)	(6)
Tax provision on curtailments, settlements and other
Components of accumulated other comprehensive income, net of taxes
Tax effects on reclassification into earnings	0	(8)
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	$ (3)	$ (14)