Fair Value Measurements - Schedule of Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Apr. 30, 2024	Jan. 31, 2024
Assets:
Cash equivalents	$ 1,006,352	$ 1,331,708
Short-term investments	2,200,935	2,083,499
Long-term investments	927,981	916,307
Money market funds
Assets:
Cash equivalents	492,568	533,211
U.S. government securities
Assets:
Cash equivalents	367,493	742,234
Time deposits
Assets:
Cash equivalents	58,145	56,263
Commercial paper
Assets:
Cash equivalents	53,735
Corporate notes and bonds
Assets:
Cash equivalents	34,411
Recurring
Assets:
Derivative assets	1,041	60
Total assets	4,136,309	4,331,574
Liabilities:
Derivative liabilities	(1,512)	(745)
Total liabilities	(1,512)	(745)
Recurring | Corporate notes and bonds
Assets:
Short-term investments	834,770	939,727
Long-term investments	655,893	607,989
Recurring | Commercial paper
Assets:
Short-term investments	528,048	353,548
Recurring | U.S. government and agency securities
Assets:
Short-term investments	518,716	573,780
Long-term investments	260,402	299,637
Recurring | Certificates of deposit
Assets:
Short-term investments	319,401	216,444
Long-term investments	11,686	8,681
Recurring | Money market funds
Assets:
Cash equivalents	492,568	533,211
Recurring | U.S. government securities
Assets:
Cash equivalents	367,493
Recurring | U.S. government securities
Assets:
Cash equivalents		742,234
Recurring | Time deposits
Assets:
Cash equivalents	58,145	56,263
Recurring | Commercial paper
Assets:
Cash equivalents	53,735
Recurring | Corporate notes and bonds
Assets:
Cash equivalents	34,411
Recurring | Level 1
Assets:
Derivative assets		0
Total assets	492,568	533,211
Liabilities:
Derivative liabilities		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 | Commercial paper
Assets:
Short-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
Long-term investments	0	0
Recurring | Level 1 | Money market funds
Assets:
Cash equivalents	492,568	533,211
Recurring | Level 1 | U.S. government securities
Assets:
Cash equivalents	0
Recurring | Level 1 | U.S. government securities
Assets:
Cash equivalents		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	1,041	60
Total assets	3,643,741	3,798,363
Liabilities:
Derivative liabilities	(1,512)	(745)
Total liabilities	(1,512)	(745)
Recurring | Level 2 | Corporate notes and bonds
Assets:
Short-term investments	834,770	939,727
Long-term investments	655,893	607,989
Recurring | Level 2 | Commercial paper
Assets:
Short-term investments	528,048	353,548
Recurring | Level 2 | U.S. government and agency securities
Assets:
Short-term investments	518,716	573,780
Long-term investments	260,402	299,637
Recurring | Level 2 | Certificates of deposit
Assets:
Short-term investments	319,401	216,444
Long-term investments	11,686	8,681
Recurring | Level 2 | Money market funds
Assets:
Cash equivalents	0	0
Recurring | Level 2 | U.S. government securities
Assets:
Cash equivalents	367,493
Recurring | Level 2 | U.S. government securities
Assets:
Cash equivalents		742,234
Recurring | Level 2 | Time deposits
Assets:
Cash equivalents	58,145	$ 56,263
Recurring | Level 2 | Commercial paper
Assets:
Cash equivalents	53,735
Recurring | Level 2 | Corporate notes and bonds
Assets:
Cash equivalents	$ 34,411