Description of Business and Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Aug. 31, 2023	Oct. 31, 2023	Oct. 31, 2022	Jul. 31, 2023
Segment Reporting Information [Line Items]
Revenue recognized		$ 638	$ 535
Deferred revenue		$ 4		$ 5
Description of timing		12 months
Segment Reconciling Items
Segment Reporting Information [Line Items]
Other corporate expenses		$ 719	$ 682
Segment Reconciling Items | Reorganization of Certain Workplace and Real Estate Functions
Segment Reporting Information [Line Items]
Other corporate expenses	$ 9
Segment Reconciling Items | Reorganization of Certain Technology Functions
Segment Reporting Information [Line Items]
Other corporate expenses	40
Segment Reconciling Items | Reorganization of Certain Technology Functions
Segment Reporting Information [Line Items]
Other corporate expenses	15
Small Business & Self-Employed | Operating Segments | Reorganization of Certain Workplace and Real Estate Functions
Segment Reporting Information [Line Items]
Other corporate expenses	(9)
Consumer | Operating Segments | Reorganization of Certain Technology Functions
Segment Reporting Information [Line Items]
Other corporate expenses	(40)
ProTax | Operating Segments | Reorganization of Certain Technology Functions
Segment Reporting Information [Line Items]
Other corporate expenses	$ (15)