Fair Value Measurements - Schedule of Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Assets, Fair Value Disclosure
Cash equivalents	$ 590,000	$ 539,389
Short-term investments	2,566,357	3,067,966
Long-term investments	947,829	1,073,023
Money market funds
Assets, Fair Value Disclosure
Cash equivalents	579,719	520,138
Money market funds \| Revision of Prior Period, Reclassification, Adjustment
Assets, Fair Value Disclosure
Cash equivalents		141,000
Time deposits
Assets, Fair Value Disclosure
Cash equivalents	5,285
Commercial paper
Assets, Fair Value Disclosure
Cash equivalents	4,996	9,304
Corporate notes and bonds
Assets, Fair Value Disclosure
Cash equivalents		6,903
Certificates of deposit
Assets, Fair Value Disclosure
Cash equivalents		3,044
Level 1 \| Money market funds \| Revision of Prior Period, Reclassification, Adjustment
Assets, Fair Value Disclosure
Cash equivalents		141,000
Recurring
Assets, Fair Value Disclosure
Total	4,104,186	4,680,378
Recurring \| Corporate notes and bonds
Assets, Fair Value Disclosure
Short-term investments	937,328	1,301,296
Long-term investments	580,413	801,784
Recurring \| U.S. government and agency securities
Assets, Fair Value Disclosure
Short-term investments	756,460	440,128
Long-term investments	367,416	263,708
Recurring \| Commercial paper
Assets, Fair Value Disclosure
Short-term investments	571,672	881,348
Recurring \| Certificates of deposit
Assets, Fair Value Disclosure
Short-term investments	300,897	445,194
Long-term investments		7,531
Recurring \| Money market funds
Assets, Fair Value Disclosure
Cash equivalents	579,719	520,138
Recurring \| Time deposits
Assets, Fair Value Disclosure
Cash equivalents	5,285
Recurring \| Commercial paper
Assets, Fair Value Disclosure
Cash equivalents	4,996	9,304
Recurring \| Corporate notes and bonds
Assets, Fair Value Disclosure
Cash equivalents		6,903
Recurring \| Certificates of deposit
Assets, Fair Value Disclosure
Cash equivalents		3,044
Recurring \| Level 1
Assets, Fair Value Disclosure
Total	579,719	520,138
Recurring \| Level 1 \| Corporate notes and bonds
Assets, Fair Value Disclosure
Short-term investments	0	0
Long-term investments	0	0
Recurring \| Level 1 \| U.S. government and agency securities
Assets, Fair Value Disclosure
Short-term investments	0	0
Long-term investments	0	0
Recurring \| Level 1 \| Commercial paper
Assets, Fair Value Disclosure
Short-term investments	0	0
Recurring \| Level 1 \| Certificates of deposit
Assets, Fair Value Disclosure
Short-term investments	0	0
Long-term investments		0
Recurring \| Level 1 \| Money market funds
Assets, Fair Value Disclosure
Cash equivalents	579,719	520,138
Recurring \| Level 1 \| Time deposits
Assets, Fair Value Disclosure
Cash equivalents	0
Recurring \| Level 1 \| Commercial paper
Assets, Fair Value Disclosure
Cash equivalents	0	0
Recurring \| Level 1 \| Corporate notes and bonds
Assets, Fair Value Disclosure
Cash equivalents		0
Recurring \| Level 1 \| Certificates of deposit
Assets, Fair Value Disclosure
Cash equivalents		0
Recurring \| Level 2
Assets, Fair Value Disclosure
Total	3,524,467	4,160,240
Recurring \| Level 2 \| Corporate notes and bonds
Assets, Fair Value Disclosure
Short-term investments	937,328	1,301,296
Long-term investments	580,413	801,784
Recurring \| Level 2 \| U.S. government and agency securities
Assets, Fair Value Disclosure
Short-term investments	756,460	440,128
Long-term investments	367,416	263,708
Recurring \| Level 2 \| Commercial paper
Assets, Fair Value Disclosure
Short-term investments	571,672	881,348
Recurring \| Level 2 \| Certificates of deposit
Assets, Fair Value Disclosure
Short-term investments	300,897	445,194
Long-term investments		7,531
Recurring \| Level 2 \| Money market funds
Assets, Fair Value Disclosure
Cash equivalents	0	0
Recurring \| Level 2 \| Time deposits
Assets, Fair Value Disclosure
Cash equivalents	5,285
Recurring \| Level 2 \| Commercial paper
Assets, Fair Value Disclosure
Cash equivalents	$ 4,996	9,304
Recurring \| Level 2 \| Corporate notes and bonds
Assets, Fair Value Disclosure
Cash equivalents		6,903
Recurring \| Level 2 \| Certificates of deposit
Assets, Fair Value Disclosure
Cash equivalents		$ 3,044

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as noncurrent.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481830/320-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(12))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479130/326-30-45-1

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