Stockholders' Deficit - Schedule of Taxes Related to Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2025	Jan. 31, 2024
Components of accumulated other comprehensive income, net of taxes
Balance at the beginning of period	$ (1,323)	$ (1,069)
Tax effects on change in unrealized components	(55)	70
Other comprehensive income (loss), net of taxes	230	(235)
Balance at the end of period	(1,072)	(1,640)
Unrealized components of available-for-sale debt securities
Components of accumulated other comprehensive income, net of taxes
Balance at the beginning of period	14	7
Unrealized gains (losses) arising during the period	4	4
Other comprehensive income (loss), net of taxes	4	4
Balance at the end of period	18	11
Unrealized components of cash flow hedges
Components of accumulated other comprehensive income, net of taxes
Balance at the beginning of period	47	230
Unrealized gains (losses) arising during the period	332	(162)
Reclassification gain (loss)	43	159
Tax effects on change in unrealized components	(54)	68
Other comprehensive income (loss), net of taxes	235	(253)
Balance at the end of period	282	(23)
Unrealized components of defined benefit plans
Components of accumulated other comprehensive income, net of taxes
Balance at the beginning of period	(496)	(437)
Unrealized gains (losses) arising during the period	1	(10)
Tax effects on change in unrealized components	(1)	2
Other comprehensive income (loss), net of taxes	4	(6)
Balance at the end of period	(492)	(443)
Amortization of actuarial loss and prior service benefit
Components of accumulated other comprehensive income, net of taxes
Reclassification gain (loss)	(5)	(2)
Curtailments, settlements and other
Components of accumulated other comprehensive income, net of taxes
Reclassification gain (loss)	1	0
Cumulative translation adjustment
Components of accumulated other comprehensive income, net of taxes
Balance at the beginning of period	1	(23)
Unrealized gains (losses) arising during the period	(13)	20
Other comprehensive income (loss), net of taxes	(13)	20
Balance at the end of period	(12)	(3)
Accumulated other comprehensive loss
Components of accumulated other comprehensive income, net of taxes
Balance at the beginning of period	(434)	(223)
Other comprehensive income (loss), net of taxes	230	(235)
Balance at the end of period	$ (204)	$ (458)