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Stockholders' Deficit - Changes and Reclassifications Related to Other Comprehensive Income (Loss), Net of Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2023	Apr. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized (losses) gains arising during the period			$ (546)
(Gains) losses reclassified into earnings			(135)
Other comprehensive income (loss), net of taxes	$ 88	$ 363	(681)	$ 607
Unrealized (losses) gains arising during the period
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized (losses) gains arising during the period	0	(3)	3	(5)
(Gains) losses reclassified into earnings			0
Net unrealized gains (losses) on cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized (losses) gains arising during the period	(46)	489	(563)	756
(Gains) losses reclassified into earnings	121	(96)	(135)	(128)
Other comprehensive income (loss), net of taxes	75	393	(698)	628
Gains (losses) arising during the period
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized (losses) gains arising during the period	5	1	(24)	16
Amortization of actuarial loss and prior service benefit
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
(Gains) losses reclassified into earnings	0	4	0	9
Curtailments, settlements and other
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
(Gains) losses reclassified into earnings	(1)	(1)	0	(1)
Change in unrealized components of defined benefit plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized (losses) gains arising during the period			(24)
(Gains) losses reclassified into earnings			0
Other comprehensive income (loss), net of taxes	4	4	(24)	24
Change in cumulative translation adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized (losses) gains arising during the period			38
(Gains) losses reclassified into earnings			0
Change in cumulative translation adjustment	$ 9	$ (31)	$ 38	$ (40)

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

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