v3.26.1
Revenue Recognition - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 31, 2026
Jul. 31, 2025
Jul. 31, 2026
Jul. 31, 2025
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligation $ 7,430   $ 7,430  
Performance obligation, timing 3 years   3 years  
Contract with customer, liability, revenue recognized $ 1,330 $ 1,140 $ 2,940 $ 2,480
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-08-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligation $ 5,240   $ 5,240  
Remaining performance obligation percentage 71.00%   71.00%  
Performance obligation, expected timing of satisfaction 12 months   12 months  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-08-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligation $ 2,190   $ 2,190  
Remaining performance obligation percentage 29.00%   29.00%  
Performance obligation, expected timing of satisfaction