Cash Equivalents and Short-Term Investments - Schedule of Continuous Unrealized Position (Details) - USD ($) $ in Thousands	Apr. 30, 2026	Jul. 31, 2025
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	$ 1,714,506	$ 553,333
Less than 12 months, unrealized losses	(7,327)	(1,037)
Greater than 12 months, fair value	0	0
Greater than 12 months, unrealized losses	0	0
Total fair value	1,714,506	553,333
Total unrealized losses	(7,327)	(1,037)
U.S. treasury securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	275,179	156,395
Less than 12 months, unrealized losses	(1,369)	(250)
Greater than 12 months, fair value	0	0
Greater than 12 months, unrealized losses	0	0
Total fair value	275,179	156,395
Total unrealized losses	(1,369)	(250)
U.S. government agency securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	37,773	36,098
Less than 12 months, unrealized losses	(163)	(40)
Greater than 12 months, fair value	0	0
Greater than 12 months, unrealized losses	0	0
Total fair value	37,773	36,098
Total unrealized losses	(163)	(40)
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	1,220,650	360,840
Less than 12 months, unrealized losses	(5,594)	(747)
Greater than 12 months, fair value	0	0
Greater than 12 months, unrealized losses	0	0
Total fair value	1,220,650	360,840
Total unrealized losses	(5,594)	$ (747)
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	175,894
Less than 12 months, unrealized losses	(199)
Greater than 12 months, fair value	0
Greater than 12 months, unrealized losses	0
Total fair value	175,894
Total unrealized losses	(199)
Non-U.S. government securities
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, fair value	5,010
Less than 12 months, unrealized losses	(2)
Greater than 12 months, fair value	0
Greater than 12 months, unrealized losses	0
Total fair value	5,010
Total unrealized losses	$ (2)

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.

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