Investments and Fair Value Measurements - Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Jul. 31, 2023	Jan. 31, 2023
Assets
Short-term investments	$ 0	$ 250,000
Cash equivalents		1,600,000
Recurring
Assets
Total assets	2,801,154	64,816
Recurring \| Level 1
Assets
Total assets	2,801,151	64,816
Recurring \| Level 2
Assets
Total assets	3	0
Recurring \| Level 3
Assets
Total assets	0	0
Recurring \| Money market funds
Assets
Cash equivalents	2,800,155	64,752
Recurring \| Money market funds \| Level 1
Assets
Cash equivalents	2,800,155	64,752
Recurring \| Money market funds \| Level 2
Assets
Cash equivalents	0	0
Recurring \| Money market funds \| Level 3
Assets
Cash equivalents	0	0
Recurring \| U.S. Treasury securities
Assets
Cash equivalents	3	0
Recurring \| U.S. Treasury securities \| Level 1
Assets
Cash equivalents	0	0
Recurring \| U.S. Treasury securities \| Level 2
Assets
Cash equivalents	3	0
Recurring \| U.S. Treasury securities \| Level 3
Assets
Cash equivalents	0	0
Recurring \| Deferred compensation investments
Assets
Other assets	996	64
Recurring \| Deferred compensation investments \| Level 1
Assets
Other assets	996	64
Recurring \| Deferred compensation investments \| Level 2
Assets
Other assets	0	0
Recurring \| Deferred compensation investments \| Level 3
Assets
Other assets	$ 0	$ 0

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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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(2))
-Publisher FASB
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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Fair value portion of other assets.

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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(8))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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-Topic 942
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-Section S99
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