Stockholders' Deficit - Schedule of Changes and Reclassifications Related to Other Comprehensive (Loss) Income, Net of Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023
Components of accumulated other comprehensive income, net of taxes
Balance at the beginning of period	$ (1,323)	$ (1,069)	$ (3,025)
Tax effects on change in unrealized components	5	46	119
Other comprehensive loss, net of taxes	(23)	(211)	(508)
Balance at the end of period	(346)	(1,323)	(1,069)
Other comprehensive loss, net of taxes:
Components of accumulated other comprehensive income, net of taxes
Balance at the beginning of period	14	7	6
Unrealized (losses) gains arising during the period	16	8	2
Tax effects on change in unrealized components of available-for-sale securities	(1)	(1)	(1)
Other comprehensive loss, net of taxes	15	7	1
Balance at the end of period	29	14	7
Unrealized components of cash flow hedges
Components of accumulated other comprehensive income, net of taxes
Balance at the beginning of period	47	230	648
Unrealized (losses) gains arising during the period	(211)	51	(427)
Losses (gains) reclassified into earnings	98	(274)	(84)
Tax effects on change in unrealized components	18	40	93
Other comprehensive loss, net of taxes	(95)	(183)	(418)
Balance at the end of period	(48)	47	230
Unrealized components of defined benefit plans
Components of accumulated other comprehensive income, net of taxes
Balance at the beginning of period	(496)	(437)	(323)
Unrealized (losses) gains arising during the period	30	(76)	(141)
Tax effects on change in unrealized components	(11)	7	27
Other comprehensive loss, net of taxes	46	(59)	(114)
Balance at the end of period	(450)	(496)	(437)
Amortization of actuarial loss and prior service benefit
Components of accumulated other comprehensive income, net of taxes
Losses (gains) reclassified into earnings	21	8	0
Curtailments, settlements and other
Components of accumulated other comprehensive income, net of taxes
Losses (gains) reclassified into earnings	6	2	0
Cumulative translation adjustment
Components of accumulated other comprehensive income, net of taxes
Balance at the beginning of period	1	(23)	(46)
Unrealized (losses) gains arising during the period	12	24	23
Tax effects on change in unrealized components	(1)	0	0
Other comprehensive loss, net of taxes	11	24	23
Balance at the end of period	12	1	(23)
Accumulated Other Comprehensive (Loss) Income
Components of accumulated other comprehensive income, net of taxes
Balance at the beginning of period	(434)	(223)	285
Other comprehensive loss, net of taxes	(23)	(211)	(508)
Balance at the end of period	$ (457)	$ (434)	$ (223)