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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, 2025
Apr. 30, 2024
Apr. 30, 2025
Apr. 30, 2024
Jul. 31, 2024
Segment Reporting Information [Line Items]          
Revenue recognized $ 111 $ 85 $ 829 $ 890  
Description of timing     12 months    
Deferred revenue 3   $ 3   $ 4
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment          
Segment Reporting Information [Line Items]          
Other corporate expenses $ 1,725 1,492 $ 4,495 3,871  
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment | Reorganization of Certain Workplace and Real Estate Functions          
Segment Reporting Information [Line Items]          
Other corporate expenses   (353)   1,000  
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment | Reorganization of Certain Technology Functions          
Segment Reporting Information [Line Items]          
Other corporate expenses   327   521  
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment | Reorganization of Certain Technology Functions          
Segment Reporting Information [Line Items]          
Other corporate expenses   10   26  
Global Business Solutions | Operating Segments | Reorganization of Certain Workplace and Real Estate Functions          
Segment Reporting Information [Line Items]          
Other corporate expenses   353   (1,000)  
Consumer | Operating Segments | Reorganization of Certain Technology Functions          
Segment Reporting Information [Line Items]          
Other corporate expenses   (327)   (521)  
ProTax | Operating Segments | Reorganization of Certain Technology Functions          
Segment Reporting Information [Line Items]          
Other corporate expenses   $ (10)   $ (26)