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Summary of Business and Significant Accounting Policies - Narrative (Details)
3 Months Ended
Apr. 30, 2025
USD ($)
Jan. 31, 2025
USD ($)
Apr. 30, 2025
USD ($)
segment
Apr. 30, 2024
USD ($)
Concentration Risk [Line Items]        
Number of operating segments | segment     1  
Capitalized contract cost, amortization term (in years) 4 years   4 years  
Capitalized contract cost, renewals and success fees, amortization term (in years)     2 years  
Impairments of costs to obtain revenue contracts     $ 0 $ 0
Stock options and restricted stock        
Concentration Risk [Line Items]        
Vesting period (in years)     4 years  
Foreign currency derivative contracts | Derivatives not designated as hedging instruments        
Concentration Risk [Line Items]        
Notional amount of foreign currency derivative contracts $ 9,000,000,000.0 $ 10,700,000,000 $ 9,000,000,000.0  
Assets | Geographic concentration risk | Non-US        
Concentration Risk [Line Items]        
Concentration risk percentage 19.00% 17.00%    
Assets | Geographic concentration risk | United States        
Concentration Risk [Line Items]        
Concentration risk percentage 80.00% 81.00%    
Strategic investments | Investment concentration risk | Four privately held investments        
Concentration Risk [Line Items]        
Concentration risk percentage 24.00%      
Strategic investments | Investment concentration risk | Two privately held investments        
Concentration Risk [Line Items]        
Concentration risk percentage   24.00%