Nature of Business and Accounting Policies - Stock-Based Compensation Expense (Details)	12 Months Ended
Dec. 31, 2024
Accounting Policies [Abstract]
Percentage of employees eligible for acceleration of equity awards (percent)	5.00%

Percentage Of Employees Eligible For Acceleration Of Equity Awards

No definition available.

Name:	vrtx_PercentageOfEmployeesEligibleForAccelerationOfEquityAwards
Namespace Prefix:	vrtx_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration