Revision of Prior Period Financial Statements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended						6 Months Ended		9 Months Ended
	Jul. 31, 2023	Apr. 30, 2023	Jan. 31, 2023	Jul. 31, 2022	Apr. 30, 2022	Jan. 31, 2022	Apr. 30, 2023	Apr. 30, 2022	Jul. 31, 2023	Jul. 31, 2022
Reclassification [Line Items]
Net revenue	$ 13,196	$ 12,907	$ 13,798	$ 14,648	$ 16,475	$ 17,013	$ 26,705	$ 33,488	$ 39,901	$ 48,136
Earnings from operations	952	747	743	1,256	1,257	1,305	1,490	2,562	2,442	3,818
Operating Segments
Reclassification [Line Items]
Net revenue	13,196			14,648					39,902	48,141
Earnings from operations	1,354			1,519					3,958	4,872
Operating Segments | Personal Systems
Reclassification [Line Items]
Net revenue	8,932			10,073					26,286	33,771
Earnings from operations	$ 592			673					$ 1,498	2,331
Adjustment
Reclassification [Line Items]
Net revenue		(6)	(30)	(16)	(15)	(15)	(36)	(30)		(46)
Earnings from operations		$ (15)	$ (22)	(16)	$ (21)	$ (54)	$ (37)	$ (75)		(91)
Adjustment | Operating Segments | Personal Systems
Reclassification [Line Items]
Net revenue				(16)						(46)
Earnings from operations				$ (16)						$ (106)