v3.26.1
Investments and Fair Value Measurements - Schedule of Financial Assets and Liabilities that are Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Jul. 31, 2026
Jan. 31, 2026
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents $ 2,260,248 $ 2,005,460
Total prepaid expenses and other current assets 497 0
Total other assets 17,909 12,710
Total assets 2,278,654 2,018,170
Time Deposits 1,200,000  
Deferred compensation investments    
Assets, Fair Value Disclosure [Abstract]    
Total other assets 17,909 12,710
Level 1    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents 1,067,046 1,407,062
Total prepaid expenses and other current assets 0 0
Total other assets 17,909 12,710
Total assets 1,084,955 1,419,772
Level 1 | Deferred compensation investments    
Assets, Fair Value Disclosure [Abstract]    
Total other assets 17,909 12,710
Level 2    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents 1,193,202 598,398
Total prepaid expenses and other current assets 497 0
Total other assets 0 0
Total assets 1,193,699 598,398
Level 2 | Deferred compensation investments    
Assets, Fair Value Disclosure [Abstract]    
Total other assets 0 0
Level 3    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents 0 0
Total prepaid expenses and other current assets 0 0
Total other assets 0 0
Total assets 0 0
Level 3 | Deferred compensation investments    
Assets, Fair Value Disclosure [Abstract]    
Total other assets 0 0
Money market funds    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents 1,067,046 1,407,062
Money market funds | Level 1    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents 1,067,046 1,407,062
Money market funds | Level 2    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents 0 0
Money market funds | Level 3    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents 0 0
U.S. Treasury securities    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents 1,193,202 598,398
U.S. Treasury securities | Level 1    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents 0 0
U.S. Treasury securities | Level 2    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents 1,193,202 598,398
U.S. Treasury securities | Level 3    
Assets, Fair Value Disclosure [Abstract]    
Cash equivalents $ 0 $ 0