v3.26.1
Fair Value Measurements - Schedule of Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Apr. 30, 2026
Jan. 31, 2026
Assets:    
Cash equivalents $ 1,556,688 $ 1,999,298
Short-term investments 870,283 1,201,523
Long-term investments 1,432,494 755,013
Marketable equity securities 6,628 6,264
Non-marketable debt securities 5,000 10,000
Money market funds    
Assets:    
Cash equivalents 1,401,999 1,752,777
Time deposits    
Assets:    
Cash equivalents 107,558 108,727
U.S. government securities    
Assets:    
Cash equivalents 44,361 94,532
Commercial paper    
Assets:    
Cash equivalents 2,770 40,379
Certificates of deposit    
Assets:    
Cash equivalents   2,808
Corporate notes and bonds    
Assets:    
Cash equivalents   75
Recurring    
Assets:    
Marketable equity securities 6,628 6,264
Non-marketable debt securities 5,000 10,000
Derivative assets 2,164 1,779
Total assets 3,873,257 3,973,877
Liabilities:    
Derivative liabilities (1,860) (2,141)
Total liabilities (1,860) (2,141)
Recurring | Corporate notes and bonds    
Assets:    
Short-term investments 629,364 860,872
Long-term investments 1,220,148 525,964
Recurring | U.S. government and agency securities    
Assets:    
Short-term investments 211,005 256,351
Long-term investments 190,886 229,049
Recurring | Certificates of deposit    
Assets:    
Short-term investments 25,307 65,689
Recurring | Commercial paper    
Assets:    
Short-term investments 4,607 18,611
Recurring | Asset-backed securities    
Assets:    
Long-term investments 21,460  
Recurring | Money market funds    
Assets:    
Cash equivalents 1,401,999 1,752,777
Recurring | Time deposits    
Assets:    
Cash equivalents 107,558 108,727
Recurring | U.S. government securities    
Assets:    
Cash equivalents 44,361 94,532
Recurring | Commercial paper    
Assets:    
Cash equivalents 2,770 40,379
Recurring | Certificates of deposit    
Assets:    
Cash equivalents   2,808
Recurring | Corporate notes and bonds    
Assets:    
Cash equivalents   75
Recurring | Level 1    
Assets:    
Marketable equity securities 6,628 6,264
Non-marketable debt securities 0 0
Derivative assets 0 0
Total assets 1,408,627 1,759,041
Liabilities:    
Derivative liabilities 0 0
Total liabilities 0 0
Recurring | Level 1 | Corporate notes and bonds    
Assets:    
Short-term investments 0 0
Long-term investments 0 0
Recurring | Level 1 | U.S. government and agency securities    
Assets:    
Short-term investments 0 0
Long-term investments 0 0
Recurring | Level 1 | Certificates of deposit    
Assets:    
Short-term investments 0 0
Recurring | Level 1 | Commercial paper    
Assets:    
Short-term investments 0 0
Recurring | Level 1 | Asset-backed securities    
Assets:    
Long-term investments 0  
Recurring | Level 1 | Money market funds    
Assets:    
Cash equivalents 1,401,999 1,752,777
Recurring | Level 1 | Time deposits    
Assets:    
Cash equivalents 0 0
Recurring | Level 1 | U.S. government securities    
Assets:    
Cash equivalents 0 0
Recurring | Level 1 | Commercial paper    
Assets:    
Cash equivalents 0 0
Recurring | Level 1 | Certificates of deposit    
Assets:    
Cash equivalents   0
Recurring | Level 1 | Corporate notes and bonds    
Assets:    
Cash equivalents   0
Recurring | Level 2    
Assets:    
Marketable equity securities 0 0
Non-marketable debt securities 0 0
Derivative assets 2,164 1,779
Total assets 2,459,630 2,204,836
Liabilities:    
Derivative liabilities (1,860) (2,141)
Total liabilities (1,860) (2,141)
Recurring | Level 2 | Corporate notes and bonds    
Assets:    
Short-term investments 629,364 860,872
Long-term investments 1,220,148 525,964
Recurring | Level 2 | U.S. government and agency securities    
Assets:    
Short-term investments 211,005 256,351
Long-term investments 190,886 229,049
Recurring | Level 2 | Certificates of deposit    
Assets:    
Short-term investments 25,307 65,689
Recurring | Level 2 | Commercial paper    
Assets:    
Short-term investments 4,607 18,611
Recurring | Level 2 | Asset-backed securities    
Assets:    
Long-term investments 21,460  
Recurring | Level 2 | Money market funds    
Assets:    
Cash equivalents 0 0
Recurring | Level 2 | Time deposits    
Assets:    
Cash equivalents 107,558 108,727
Recurring | Level 2 | U.S. government securities    
Assets:    
Cash equivalents 44,361 94,532
Recurring | Level 2 | Commercial paper    
Assets:    
Cash equivalents 2,770 40,379
Recurring | Level 2 | Certificates of deposit    
Assets:    
Cash equivalents   2,808
Recurring | Level 2 | Corporate notes and bonds    
Assets:    
Cash equivalents   75
Recurring | Level 3    
Assets:    
Marketable equity securities 0 0
Non-marketable debt securities 5,000 10,000
Derivative assets 0 0
Total assets 5,000 10,000
Liabilities:    
Derivative liabilities 0 0
Total liabilities 0 0
Recurring | Level 3 | Corporate notes and bonds    
Assets:    
Short-term investments 0 0
Long-term investments 0 0
Recurring | Level 3 | U.S. government and agency securities    
Assets:    
Short-term investments 0 0
Long-term investments 0 0
Recurring | Level 3 | Certificates of deposit    
Assets:    
Short-term investments 0 0
Recurring | Level 3 | Commercial paper    
Assets:    
Short-term investments 0 0
Recurring | Level 3 | Asset-backed securities    
Assets:    
Long-term investments 0  
Recurring | Level 3 | Money market funds    
Assets:    
Cash equivalents 0 0
Recurring | Level 3 | Time deposits    
Assets:    
Cash equivalents 0 0
Recurring | Level 3 | U.S. government securities    
Assets:    
Cash equivalents 0 0
Recurring | Level 3 | Commercial paper    
Assets:    
Cash equivalents $ 0 0
Recurring | Level 3 | Certificates of deposit    
Assets:    
Cash equivalents   0
Recurring | Level 3 | Corporate notes and bonds    
Assets:    
Cash equivalents   $ 0