Stockholders’ Deficit - Schedule of Accumulated Other Comprehensive Loss, Net of Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Components of accumulated other comprehensive income, net of taxes
Other comprehensive (loss) income before reclassifications	$ (19)
Reclassifications of losses (gains) into earnings	(299)
Reclassifications of curtailments, settlements and other into earnings	(62)
Net unrealized gains on available-for-sale securities
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	5
Other comprehensive (loss) income before reclassifications	1	$ (2)	$ 3
Reclassifications of losses (gains) into earnings	3	(5)	0
Reclassifications of curtailments, settlements and other into earnings	0
Balance at end of period	9	5
Net unrealized gains (losses) on cash flow hedges
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	291
Other comprehensive (loss) income before reclassifications	215	299	(609)
Reclassifications of losses (gains) into earnings	(334)	232	$ 183
Reclassifications of curtailments, settlements and other into earnings	0
Balance at end of period	172	291
Unrealized components of defined benefit plans
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	(1,141)
Other comprehensive (loss) income before reclassifications	(239)
Reclassifications of losses (gains) into earnings	32
Reclassifications of curtailments, settlements and other into earnings	(62)
Balance at end of period	(1,410)	(1,141)
Change in cumulative translation adjustment
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	0
Other comprehensive (loss) income before reclassifications	4
Reclassifications of losses (gains) into earnings	0
Reclassifications of curtailments, settlements and other into earnings	0
Balance at end of period	4	0
Accumulated other comprehensive loss
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period	(845)
Balance at end of period	$ (1,225)	$ (845)