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Cash Equivalents and Investments - Schedule of Unrealized Loss Position and Fair Value of Debt Securities (Details) $ in Millions | Jan. 31, 2023 USD ($)
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Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] |
Estimated fair value, less than 12 months | $ 1,217
Estimated fair value, more than 12 months | 960
Estimated fair value | 2,177
Unrealized losses, less than 12 months | (9)
Unrealized losses, more than 12 months | (15)
Unrealized losses | (24)
U.S. treasury securities |
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] |
Estimated fair value, less than 12 months | 1,204
Estimated fair value, more than 12 months | 846
Estimated fair value | 2,050
Unrealized losses, less than 12 months | (9)
Unrealized losses, more than 12 months | (13)
Unrealized losses | (22)
Corporate debt securities |
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] |
Estimated fair value, less than 12 months | 13
Estimated fair value, more than 12 months | 114
Estimated fair value | 127
Unrealized losses, less than 12 months | 0
Unrealized losses, more than 12 months | (2)
Unrealized losses | $ (2)

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 + Details
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