Fair Value Measurements - Schedule of Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Oct. 31, 2024	Jan. 31, 2024
Assets:
Cash equivalents	$ 1,784,997	$ 1,331,708
Short-term investments	2,008,062	2,083,499
Long-term investments	892,777	916,307
Money market funds
Assets:
Cash equivalents	1,479,438	533,211
U.S. government securities
Assets:
Cash equivalents	154,090	742,234
Time deposits
Assets:
Cash equivalents	109,513	56,263
Commercial paper
Assets:
Cash equivalents	27,072
Corporate notes and bonds
Assets:
Cash equivalents	14,884
Recurring
Assets:
Derivative assets	2,028	60
Total assets	4,687,864	4,331,574
Liabilities:
Derivative liabilities	(1,408)	(745)
Total liabilities	(1,408)	(745)
Recurring | Corporate notes and bonds
Assets:
Short-term investments	1,097,552	939,727
Long-term investments	673,640	607,989
Recurring | U.S. government and agency securities
Assets:
Short-term investments	388,779	573,780
Long-term investments	219,137	299,637
Recurring | Commercial paper
Assets:
Short-term investments	341,943	353,548
Recurring | Certificates of deposit
Assets:
Short-term investments	179,788	216,444
Long-term investments		8,681
Recurring | Money market funds
Assets:
Cash equivalents	1,479,438	533,211
Recurring | U.S. government securities
Assets:
Cash equivalents	154,090	742,234
Recurring | Time deposits
Assets:
Cash equivalents	109,513	56,263
Recurring | Commercial paper
Assets:
Cash equivalents	27,072
Recurring | Corporate notes and bonds
Assets:
Cash equivalents	14,884
Recurring | Level 1
Assets:
Derivative assets	0	0
Total assets	1,479,438	533,211
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 | Commercial paper
Assets:
Short-term investments	0	0
Recurring | Level 1 | Certificates of deposit
Assets:
Short-term investments	0	0
Long-term investments		0
Recurring | Level 1 | Money market funds
Assets:
Cash equivalents	1,479,438	533,211
Recurring | Level 1 | U.S. government securities
Assets:
Cash equivalents	0	0
Recurring | Level 1 | Time deposits
Assets:
Cash equivalents	0	0
Recurring | Level 1 | Commercial paper
Assets:
Cash equivalents	0
Recurring | Level 1 | Corporate notes and bonds
Assets:
Cash equivalents	0
Recurring | Level 2
Assets:
Derivative assets	2,028	60
Total assets	3,208,426	3,798,363
Liabilities:
Derivative liabilities	(1,408)	(745)
Total liabilities	(1,408)	(745)
Recurring | Level 2 | Corporate notes and bonds
Assets:
Short-term investments	1,097,552	939,727
Long-term investments	673,640	607,989
Recurring | Level 2 | U.S. government and agency securities
Assets:
Short-term investments	388,779	573,780
Long-term investments	219,137	299,637
Recurring | Level 2 | Commercial paper
Assets:
Short-term investments	341,943	353,548
Recurring | Level 2 | Certificates of deposit
Assets:
Short-term investments	179,788	216,444
Long-term investments		8,681
Recurring | Level 2 | Money market funds
Assets:
Cash equivalents	0	0
Recurring | Level 2 | U.S. government securities
Assets:
Cash equivalents	154,090	742,234
Recurring | Level 2 | Time deposits
Assets:
Cash equivalents	109,513	$ 56,263
Recurring | Level 2 | Commercial paper
Assets:
Cash equivalents	27,072
Recurring | Level 2 | Corporate notes and bonds
Assets:
Cash equivalents	$ 14,884