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Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value (Details) - Recurring - USD ($) $ in Millions | Jan. 31, 2023 | Jan. 31, 2022
--- | --- | ---
Assets: |  |
Total cash equivalents | $ 133 | $ 152
Total short-term investments | 2,316 | 2,242
Total cash equivalents and short-term investments | 2,449 | 2,394
Level 1 |  |
Assets: |  |
Total cash equivalents | 133 | 152
Total short-term investments | 0 | 0
Total cash equivalents and short-term investments | 133 | 152
Level 2 |  |
Assets: |  |
Total cash equivalents | 0 | 0
Total short-term investments | 2,316 | 2,242
Total cash equivalents and short-term investments | 2,316 | 2,242
Level 3 |  |
Assets: |  |
Total cash equivalents | 0 | 0
Total short-term investments | 0 | 0
Total cash equivalents and short-term investments | 0 | 0
U.S. treasury securities |  |
Assets: |  |
Total short-term investments | 2,185 | 1,913
U.S. treasury securities | Level 1 |  |
Assets: |  |
Total short-term investments | 0 | 0
U.S. treasury securities | Level 2 |  |
Assets: |  |
Total short-term investments | 2,185 | 1,913
U.S. treasury securities | Level 3 |  |
Assets: |  |
Total short-term investments | 0 | 0
Corporate debt securities |  |
Assets: |  |
Total short-term investments | 131 | 329
Corporate debt securities | Level 1 |  |
Assets: |  |
Total short-term investments | 0 | 0
Corporate debt securities | Level 2 |  |
Assets: |  |
Total short-term investments | 131 | 329
Corporate debt securities | Level 3 |  |
Assets: |  |
Total short-term investments | 0 | 0
Money market funds |  |
Assets: |  |
Total cash equivalents | 133 | 152
Money market funds | Level 1 |  |
Assets: |  |
Total cash equivalents | 133 | 152
Money market funds | Level 2 |  |
Assets: |  |
Total cash equivalents | 0 | 0
Money market funds | Level 3 |  |
Assets: |  |
Total cash equivalents | $ 0 | $ 0

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition 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. + References No definition available. + Details
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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