A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

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

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

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- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Stockholders' Deficit - Accumulated Other Comprehensive Loss, Net of Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period			$ (2,228)
Other comprehensive income (loss) before reclassifications			(287)
Reclassifications of losses into earnings			209
Balance at end of period	$ (3,360)		(3,360)
Accumulated other comprehensive loss
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period			(1,243)
Balance at end of period	(1,320)		(1,320)
Net unrealized gains on available-for-sale debt securities
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period			11
Other comprehensive income (loss) before reclassifications	0	$ (2)	3	$ (1)
Reclassifications of losses into earnings			0
Balance at end of period	14		14
Net unrealized (losses) gains on cash flow hedges
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period			(66)
Other comprehensive income (loss) before reclassifications	(28)	198	(347)	242
Reclassifications of losses into earnings	132	$ (37)	177	$ (86)
Balance at end of period	(236)		(236)
Unrealized components of defined benefit plans
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period			(1,190)
Other comprehensive income (loss) before reclassifications			30
Reclassifications of losses into earnings			32
Balance at end of period	(1,127)		(1,127)
Reclassifications of settlements into earnings
Components of accumulated other comprehensive income, net of taxes
Reclassifications of losses into earnings			1
Change in cumulative translation adjustment
Components of accumulated other comprehensive income, net of taxes
Balance at beginning of period			2
Other comprehensive income (loss) before reclassifications			27
Reclassifications of losses into earnings			0
Balance at end of period	$ 29		$ 29