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Description of Business and Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Apr. 30, 2024
Apr. 30, 2023
Apr. 30, 2024
Apr. 30, 2023
Jul. 31, 2023
Segment Reporting Information [Line Items]          
Revenue recognized $ 85 $ 85 $ 890 $ 778  
Deferred revenue 4   $ 4   $ 5
Description of timing     12 months    
Segment Reconciling Items          
Segment Reporting Information [Line Items]          
Other corporate expenses $ 802 685 $ 2,289 2,086  
Segment Reconciling Items | Reorganization of Certain Workplace and Real Estate Functions          
Segment Reporting Information [Line Items]          
Other corporate expenses   18   37  
Segment Reconciling Items | Reorganization of Certain Technology Functions          
Segment Reporting Information [Line Items]          
Other corporate expenses   43   126  
Segment Reconciling Items | Reorganization of Certain Technology Functions          
Segment Reporting Information [Line Items]          
Other corporate expenses   14   45  
Small Business & Self-Employed | Operating Segments | Reorganization of Certain Workplace and Real Estate Functions          
Segment Reporting Information [Line Items]          
Other corporate expenses   18   37  
Consumer | Operating Segments | Reorganization of Certain Technology Functions          
Segment Reporting Information [Line Items]          
Other corporate expenses   43   126  
ProTax | Operating Segments | Reorganization of Certain Technology Functions          
Segment Reporting Information [Line Items]          
Other corporate expenses   $ 14   $ 45