Hedging - Cash Flow Hedging Instruments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items]
Total revenues	$ 3,076.4	$ 2,771.9	$ 8,811.3	$ 8,108.1
Other expense, net	(9.8)	(16.9)	(14.2)	(71.2)
Foreign Currency Forward Contract \| Reclassification out of Accumulated Other Comprehensive Income \| Foreign currency forward contracts \| Not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Other expense, net	(22.9)	0.1	(27.2)	(15.7)
Product revenues, net
Derivative Instruments, Gain (Loss) [Line Items]
Total revenues	3,076.4	2,771.9	8,780.6	8,108.1
Product revenues, net \| Foreign Currency Forward Contract \| Reclassification out of Accumulated Other Comprehensive Income \| Foreign currency forward contracts \| Designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
Total revenues	$ (39.0)	$ (3.1)	$ (36.2)	$ 11.2

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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VERTEX PHARMACEUTICALS INC / MA 10-Q