Stockholders' Deficit - Schedule of Tax Effects Related to Other Comprehensive (Loss) Income (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Components of accumulated other comprehensive income, net of taxes
Tax benefit on other comprehensive loss	$ 40	$ 65
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	0	1
Tax benefit on other comprehensive loss	0	1
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	20	70
Tax effects on reclassification into earnings	22	(3)
Tax benefit on other comprehensive loss	42	67
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)	(3)
Tax benefit on settlements and other
Components of accumulated other comprehensive income, net of taxes
Tax effects on reclassification into earnings	1	0
Tax effects on change in unrealized components of defined benefit plans
Components of accumulated other comprehensive income, net of taxes
Tax benefit on other comprehensive loss	(2)	(3)
Change in cumulative translation adjustment
Components of accumulated other comprehensive income, net of taxes
Tax benefit on other comprehensive loss	$ 0	$ 0