Stockholders' Deficit - Changes and Reclassifications Related to Other Comprehensive Income, Net of Taxes (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized gains arising during the period			$ (176)
Losses (gains) reclassified into earnings			285
Other comprehensive income (loss), net of taxes	$ 187	$ (555)	110	$ (380)
Change in unrealized gains (losses) on available-for-sale securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized gains arising during the period	1	2	4	1
Losses (gains) reclassified into earnings			0
Net unrealized (losses) gains on cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized gains arising during the period	111	(480)	(236)	(238)
Losses (gains) reclassified into earnings	60	(105)	237	(191)
Other comprehensive income (loss), net of taxes	171	(585)	1	(429)
Tax benefit (provision) on (losses) gains arising during the period
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized gains arising during the period	(1)	(4)	29	(5)
Tax benefit on amortization of actuarial loss and prior service benefit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Losses (gains) reclassified into earnings	16	15	48	46
Curtailments, settlements and other
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Losses (gains) reclassified into earnings	0	2	1	3
Change in unrealized components of defined benefit plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized gains arising during the period			29
Losses (gains) reclassified into earnings			48
Other comprehensive income (loss), net of taxes	15	13	78	44
Change in cumulative translation adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized gains arising during the period			27
Losses (gains) reclassified into earnings			0
Change in cumulative translation adjustment	$ 0	$ 15	$ 27	$ 4

Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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