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Stockholders' Deficit - Tax Effects Related to Other Comprehensive (Loss) Income (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
Tax provision on other comprehensive income	$ (41)	$ (22)	$ (9)	$ (33)
Tax provision on unrealized gains arising during the period
Components of accumulated other comprehensive income, net of taxes
Tax effects on change arising during the period	0	0	(1)	0
Net unrealized (losses) gains on cash flow hedges
Components of accumulated other comprehensive income, net of taxes
Tax effects on change arising during the period	(7)	(33)	40	(49)
Tax effects on reclassification into earnings	(17)	16	(21)	26
Tax provision on other comprehensive income	(24)	(17)	19	(23)
Tax provision on gains arising during the period
Components of accumulated other comprehensive income, net of taxes
Tax effects on change arising during the period	(11)	0	(11)	0
Tax benefit on amortization of actuarial loss and prior service benefit
Components of accumulated other comprehensive income, net of taxes
Tax effects on reclassification into earnings	(5)	(5)	(10)	(10)
Unrealized components of defined benefit plans
Components of accumulated other comprehensive income, net of taxes
Tax provision on other comprehensive income	(16)	(5)	(21)	(10)
Change in cumulative translation adjustment
Components of accumulated other comprehensive income, net of taxes
Tax provision on other comprehensive income	$ (1)	$ 0	$ (6)	$ 0

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