Fair Value Measurements - Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2023	Jul. 31, 2022
Financial Assets:
Short-term investments:	$ 904,763	$ 921,429
Recurring
Financial Assets:
Total measured at fair value	1,171,987	1,177,152
Cash	139,377	147,127
Total cash, cash equivalents and short-term investments	1,311,364	1,324,279
Recurring \| Corporate bonds
Financial Assets:
Short-term investments:	467,686	409,024
Recurring \| Money market funds
Financial Assets:
Cash equivalents:	236,317	227,796
Recurring \| Commercial paper
Financial Assets:
Cash equivalents:	27,928	27,927
Short-term investments:	235,575	317,738
Recurring \| U.S. government securities
Financial Assets:
Cash equivalents:	2,979
Short-term investments:	201,502	194,667
Recurring \| Level I
Financial Assets:
Total measured at fair value	236,317	227,796
Recurring \| Level I \| Corporate bonds
Financial Assets:
Short-term investments:		0
Recurring \| Level I \| Money market funds
Financial Assets:
Cash equivalents:	236,317	227,796
Recurring \| Level I \| Commercial paper
Financial Assets:
Cash equivalents:	0	0
Short-term investments:		0
Recurring \| Level I \| U.S. government securities
Financial Assets:
Short-term investments:		0
Recurring \| Level II
Financial Assets:
Total measured at fair value	935,670	949,356
Recurring \| Level II \| Corporate bonds
Financial Assets:
Cash equivalents:	467,686
Short-term investments:		409,024
Recurring \| Level II \| Money market funds
Financial Assets:
Cash equivalents:	0	0
Recurring \| Level II \| Commercial paper
Financial Assets:
Cash equivalents:	27,928	27,927
Short-term investments:	235,575	317,738
Recurring \| Level II \| U.S. government securities
Financial Assets:
Cash equivalents:	2,979
Short-term investments:	201,502	194,667
Recurring \| Level III
Financial Assets:
Total measured at fair value	0	0
Recurring \| Level III \| Corporate bonds
Financial Assets:
Cash equivalents:	0
Short-term investments:		0
Recurring \| Level III \| Money market funds
Financial Assets:
Cash equivalents:	0	0
Recurring \| Level III \| Commercial paper
Financial Assets:
Cash equivalents:	0	0
Short-term investments:	0	0
Recurring \| Level III \| U.S. government securities
Financial Assets:
Cash equivalents:	0
Short-term investments:	$ 0	$ 0

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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 current.

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Amount 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. Excludes cash and cash equivalents within disposal group and discontinued operation.

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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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Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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