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Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details)
12 Months Ended
Jan. 31, 2026
USD ($)
segment
Jan. 31, 2025
USD ($)
Jan. 31, 2024
USD ($)
Concentration Risk [Line Items]      
Number of operating segments | segment 1    
Number of reportable segments | segment 1    
Advertising costs $ 121,500,000 $ 104,500,000 $ 85,300,000
Incremental cost amortization period 5 years    
Impairment losses $ 0 0 0
Asset impairment related to office facility exit 108,715,000 $ 0 $ 0
San Mateo Office Facility      
Concentration Risk [Line Items]      
Operating Lease, Impairment Loss $ 87,900,000    
Capitalized software development costs      
Concentration Risk [Line Items]      
Estimated useful life 3 years    
Leasehold Improvements And Furniture And Fixtures | San Mateo Office Facility      
Concentration Risk [Line Items]      
Asset impairment related to office facility exit $ 20,800,000    
Minimum      
Concentration Risk [Line Items]      
Contract term 1 year    
Estimated useful life 3 years    
Maximum      
Concentration Risk [Line Items]      
Contract term 4 years    
Estimated useful life 7 years    
On-demand arrangements | Revenue from Contract with Customer Benchmark | Product and Service      
Concentration Risk [Line Items]      
Concentration risk, percentage 1.00% 2.00% 3.00%