Supplementary Financial Information - Interest and Other, Net (Details) - USD ($)	3 Months Ended					6 Months Ended	9 Months Ended
	Jul. 31, 2023	Jan. 31, 2023	Jul. 31, 2022	Apr. 30, 2022	Jan. 31, 2022	Apr. 30, 2022	Jul. 31, 2023	Jul. 31, 2022
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Interest expense on borrowings	$ (134,000,000)		$ (96,000,000)				$ (429,000,000)	$ (229,000,000)
Net gain on debt extinguishment	115,000,000		0				107,000,000	0
Non-operating retirement-related credits	14,000,000		38,000,000				40,000,000	110,000,000
Factoring costs	(37,000,000)		0				(99,000,000)	0
Other, net	26,000,000		(12,000,000)				24,000,000	(22,000,000)
Interest and other, net	$ (16,000,000)	$ (181,000,000)	(70,000,000)	$ (41,000,000)	$ (30,000,000)	$ (71,000,000)	$ (357,000,000)	(141,000,000)
Selling, General and Administrative Expenses
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Factoring costs			$ 0					$ 0