Segment Information - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 31, 2025 USD ($)	Jan. 31, 2024 USD ($)	Jan. 31, 2025 USD ($) segment	Jan. 31, 2024 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			4
Operating Segments | Global Business Solutions | Reorganization of Certain Workplace and Real Estate Functions
Segment Reporting Information [Line Items]
Other corporate expenses		$ 350		$ 682
Operating Segments | Consumer | Reorganization of Certain Technology Functions
Segment Reporting Information [Line Items]
Other corporate expenses		129		194
Operating Segments | ProTax | Reorganization of Certain Technology Functions
Segment Reporting Information [Line Items]
Other corporate expenses		8		16
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Segment Reporting Information [Line Items]
Other corporate expenses	$ 1,443	1,255	$ 2,770	2,379
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment | Reorganization of Certain Workplace and Real Estate Functions
Segment Reporting Information [Line Items]
Other corporate expenses		350		682
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment | Reorganization of Certain Technology Functions
Segment Reporting Information [Line Items]
Other corporate expenses		129		194
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment | Reorganization of Certain Technology Functions
Segment Reporting Information [Line Items]
Other corporate expenses		$ 8		$ 16
Non-US | Revenue Benchmark | Geographic Concentration Risk
Segment Reporting Information [Line Items]
International total net revenue as a percentage of total	9.00%	9.00%	9.00%	10.00%