Fair Value Measurements - Schedule of Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jul. 31, 2024	Jan. 31, 2024
Assets:
Cash equivalents	$ 979,821	$ 1,331,708
Short-term investments	1,948,462	2,083,499
Long-term investments	697,406	916,307
Money market funds
Assets:
Cash equivalents	636,041	533,211
U.S. government securities
Assets:
Cash equivalents	276,145	742,234
Time deposits
Assets:
Cash equivalents	65,287	56,263
Commercial paper
Assets:
Cash equivalents	2,348
Recurring
Assets:
Derivative assets	1,075	60
Total assets	3,626,764	4,331,574
Liabilities:
Derivative liabilities	(565)	(745)
Total liabilities	(565)	(745)
Recurring | Corporate notes and bonds
Assets:
Short-term investments	770,287	939,727
Long-term investments	503,793	607,989
Recurring | U.S. government and agency securities
Assets:
Short-term investments	488,432	573,780
Long-term investments	181,914	299,637
Recurring | Commercial paper
Assets:
Short-term investments	443,159	353,548
Recurring | Certificates of deposit
Assets:
Short-term investments	246,584	216,444
Long-term investments	11,699	8,681
Recurring | Money market funds
Assets:
Cash equivalents	636,041	533,211
Recurring | U.S. government securities
Assets:
Cash equivalents	276,145	742,234
Recurring | Time deposits
Assets:
Cash equivalents	65,287	56,263
Recurring | Commercial paper
Assets:
Cash equivalents	2,348
Recurring | Level 1
Assets:
Derivative assets	0	0
Total assets	636,041	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	0
Recurring | Level 1 | Money market funds
Assets:
Cash equivalents	636,041	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 2
Assets:
Derivative assets	1,075	60
Total assets	2,990,723	3,798,363
Liabilities:
Derivative liabilities	(565)	(745)
Total liabilities	(565)	(745)
Recurring | Level 2 | Corporate notes and bonds
Assets:
Short-term investments	770,287	939,727
Long-term investments	503,793	607,989
Recurring | Level 2 | U.S. government and agency securities
Assets:
Short-term investments	488,432	573,780
Long-term investments	181,914	299,637
Recurring | Level 2 | Commercial paper
Assets:
Short-term investments	443,159	353,548
Recurring | Level 2 | Certificates of deposit
Assets:
Short-term investments	246,584	216,444
Long-term investments	11,699	8,681
Recurring | Level 2 | Money market funds
Assets:
Cash equivalents	0	0
Recurring | Level 2 | U.S. government securities
Assets:
Cash equivalents	276,145	742,234
Recurring | Level 2 | Time deposits
Assets:
Cash equivalents	65,287	$ 56,263
Recurring | Level 2 | Commercial paper
Assets:
Cash equivalents	$ 2,348