Cash Equivalents and Investments - Schedule of Cash and Cash Equivalents and Investments Fair Value (Details) - USD ($) $ in Thousands	Oct. 31, 2024	Jan. 31, 2024
Cash equivalents:
Amortized Cost	$ 1,784,996	$ 1,331,709
Gross Unrealized Gains	3	1
Gross Unrealized Losses	(2)	(2)
Estimated Fair Value	1,784,997	1,331,708
Investments:
Amortized Cost	2,900,618	3,005,041
Gross Unrealized Gains	3,546	2,958
Gross Unrealized Losses	(3,325)	(8,193)
Estimated Fair Value	2,900,839	2,999,806
Amortized Cost	4,685,614	4,336,750
Gross Unrealized Gains	3,549	2,959
Gross Unrealized Losses	(3,327)	(8,195)
Estimated Fair Value	4,685,836	4,331,514
Corporate notes and bonds
Investments:
Amortized Cost	1,770,898	1,549,151
Gross Unrealized Gains	2,476	1,959
Gross Unrealized Losses	(2,182)	(3,394)
Estimated Fair Value	1,771,192	1,547,716
U.S. government and agency securities
Investments:
Amortized Cost	608,263	877,496
Gross Unrealized Gains	674	574
Gross Unrealized Losses	(1,021)	(4,653)
Estimated Fair Value	607,916	873,417
Commercial paper
Investments:
Amortized Cost	341,828	353,525
Gross Unrealized Gains	228	154
Gross Unrealized Losses	(113)	(131)
Estimated Fair Value	341,943	353,548
Certificates of deposit
Investments:
Amortized Cost	179,629	224,869
Gross Unrealized Gains	168	271
Gross Unrealized Losses	(9)	(15)
Estimated Fair Value	179,788	225,125
Money market funds
Cash equivalents:
Amortized Cost	1,479,438	533,211
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	1,479,438	533,211
U.S. government securities
Cash equivalents:
Amortized Cost	154,090	742,235
Gross Unrealized Gains	1	1
Gross Unrealized Losses	(1)	(2)
Estimated Fair Value	154,090	742,234
Time deposits
Cash equivalents:
Amortized Cost	109,513	56,263
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	109,513	$ 56,263
Commercial paper
Cash equivalents:
Amortized Cost	27,070
Gross Unrealized Gains	2
Gross Unrealized Losses	0
Estimated Fair Value	27,072
Corporate notes and bonds
Cash equivalents:
Amortized Cost	14,885
Gross Unrealized Gains	0
Gross Unrealized Losses	(1)
Estimated Fair Value	$ 14,884

Cash Equivalents, Accumulated Gross Unrealized Gain, Before Tax

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Cash Equivalents And Debt Securities, Available-For-Sale, Accumulated Gross Unrealized Gains, Before Tax

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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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.

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