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Debt - Narrative (Details) - USD ($)	1 Months Ended		3 Months Ended		6 Months Ended
	Jan. 31, 2021	Sep. 30, 2018	Jan. 31, 2024	Oct. 31, 2023	Jul. 31, 2024	Jul. 31, 2023	May 31, 2023
Convertible Senior Notes Due 2023 | Convertible Debt
Debt Conversion [Line Items]
Principal on face amount of debt		$ 575,000,000.0
Debt interest rate percentage		0.50%
Proceeds from issuance of debt		$ 560,800,000
Repayments of convertible senior notes				$ 37,100,000
Debt instrument, effective interest rate					1.00%
Convertible Senior Notes Due 2023 | Convertible Debt | Capped Calls
Debt Conversion [Line Items]
Settlement of capped calls, net of related costs						$ 23,700,000
Convertible Senior Notes Due 2024 | Convertible Debt
Debt Conversion [Line Items]
Principal on face amount of debt	$ 690,000,000.0
Debt interest rate percentage	0.00%
Proceeds from issuance of debt	$ 677,300,000
Repayments of convertible senior notes			$ 689,900,000
Debt instrument, effective interest rate					0.60%
Credit Facility | Revolving Credit Facility
Debt Conversion [Line Items]
Line of credit, maximum borrowing capacity							$ 500,000,000.0
Line of credit, additional borrowing amount							$ 250,000,000.0
Carrying value of debt					$ 0
Credit Facility | Revolving Credit Facility | Minimum
Debt Conversion [Line Items]
Line of credit, commitment fee percentage on undrawn balance					0.25%
Credit Facility | Revolving Credit Facility | Maximum
Debt Conversion [Line Items]
Line of credit, commitment fee percentage on undrawn balance					0.30%

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