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Summary of Business and Significant Accounting Policies - Narrative (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Oct. 31, 2025
USD ($)
Oct. 31, 2024
USD ($)
Oct. 31, 2025
USD ($)
segment
Oct. 31, 2024
USD ($)
Jan. 31, 2025
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 $ 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 $ 13,300,000,000   $ 13,300,000,000   $ 10,700,000,000
Assets | Geographic concentration risk | Non-US          
Concentration Risk [Line Items]          
Concentration risk percentage     15.00%   17.00%
Assets | Geographic concentration risk | United States          
Concentration Risk [Line Items]          
Concentration risk percentage     84.00%   81.00%
Strategic investments | Investment concentration risk | Three privately held investments          
Concentration Risk [Line Items]          
Concentration risk percentage     32.00%    
Strategic investments | Investment concentration risk | Four privately held investments          
Concentration Risk [Line Items]          
Concentration risk percentage         24.00%