Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-6

+ Details

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Consolidated leverage ratio that must be maintained in order to be in compliance with debt covenants.

+ References

No definition available.

+ Details

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- Definition

Debt Covenant, Increase In Consolidated Leverage Ratio

+ References

No definition available.

+ Details

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Namespace Prefix:	vrtx_
Data Type:	xbrli:pureItemType
Balance Type:	na
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- Definition

Amount of indemnification claims currently outstanding

+ References

No definition available.

+ Details

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Namespace Prefix:	vrtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of increased borrowing capacity available in the future.

+ References

No definition available.

+ Details

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Namespace Prefix:	vrtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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Balance Type:
Period Type:

- Details

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- Details

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Period Type:

- Details

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- Details

Name:	srt_RangeAxis=srt_MaximumMember
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Commitments and Contingencies - Additional Information (Details) - USD ($)	1 Months Ended
	Jul. 31, 2022	Mar. 31, 2026
Line of Credit Facility [Line Items]
Indemnification claims		$ 0
Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 500,000,000.0
Line of credit facility additional borrowing capacity	$ 500,000,000.0
Debt covenant, consolidated leverage ratio	3.50
Debt covenant, increase in consolidated leverage ratio	4.00
Revolving Credit Facility \| Minimum \| Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)	0.00%
Revolving Credit Facility \| Minimum \| SOFR Loan
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)	1.00%
Revolving Credit Facility \| Maximum \| Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)	0.50%
Revolving Credit Facility \| Maximum \| SOFR Loan
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)	1.50%
Letters of Credit
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 100,000,000.0