Convertible Senior Notes - Narrative (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) day $ / shares	Oct. 31, 2025 USD ($) $ / shares	Oct. 31, 2024 $ / shares	Oct. 31, 2025 USD ($) $ / shares	Oct. 31, 2024 USD ($) $ / shares
Debt Instrument [Line Items]
Amortization of debt issuance costs				$ 6,220,000	$ 689,000
Purchases of capped calls related to convertible senior notes				$ 0	$ 195,500,000
Weighted-average price per share (in dollars per share) | $ / shares		$ 223.35	$ 115.11	$ 169.95	$ 130.87
Shares Repurchased In Privately Negotiated Transactions Entered Into In Connection With Convertible Senior Notes
Debt Instrument [Line Items]
Aggregate purchase price	$ 399,600,000
Weighted-average price per share (in dollars per share) | $ / shares	$ 112.50
Debt Conversion Terms One
Debt Instrument [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.0001
Convertible Senior Notes
Debt Instrument [Line Items]
Purchases of capped calls related to convertible senior notes	$ 195,500,000
Convertible Senior Notes | Call Option
Debt Instrument [Line Items]
Cap price (in dollars per share) | $ / shares	$ 225.00
Convertible Senior Notes | Convertible Debt
Debt Instrument [Line Items]
Face amount of debt issued	$ 2,300,000,000
Proceeds from convertible debt, net of issuance costs	2,270,000,000
Debt issuance costs	$ 31,200,000
Redemption price, percentage of principal amount redeemed, under fundamental changes	1
Amortization of debt issuance costs		$ 0		$ 0
Convertible Senior Notes | Convertible Debt | Debt Conversion Terms One
Debt Instrument [Line Items]
Threshold number of trading days | day	20
Threshold number of consecutive trading days | day	30
Threshold percentage of stock trading price	130.00%
Convertible Senior Notes | Convertible Debt | Debt Conversion Terms Two
Debt Instrument [Line Items]
Threshold number of trading days | day	5
Threshold number of consecutive trading days | day	10
Threshold percentage of stock trading price	98.00%
Convertible Senior Notes Due 2027 | Call Option
Debt Instrument [Line Items]
Cap price (in dollars per share) | $ / shares	$ 225.00
Convertible Senior Notes Due 2027 | Convertible Debt
Debt Instrument [Line Items]
Face amount of debt issued	$ 1,150,000,000
Stated interest percentage	0.00%
Threshold percentage of stock price trigger	1.50
Threshold number of trading days | day	20
Threshold number of consecutive trading days | day	30
Redemption price, percentage	100.00%
Effective interest rate, percentage	0.04%
Term (in months) (more than)				12 months
Convertible Senior Notes Due 2029 | Call Option
Debt Instrument [Line Items]
Cap price (in dollars per share) | $ / shares	$ 225.00
Convertible Senior Notes Due 2029 | Convertible Debt
Debt Instrument [Line Items]
Face amount of debt issued	$ 1,150,000,000
Stated interest percentage	0.00%
Threshold percentage of stock price trigger	1.30
Threshold number of trading days | day	20
Threshold number of consecutive trading days | day	30
Redemption price, percentage	100.00%
Effective interest rate, percentage	0.02%
Term (in months) (more than)				12 months