v3.25.4

Stockholders' Equity - Schedule of Shares Available for Grant (Details) | 12 Months Ended
--- | ---
Dec. 31, 2025 shares
Shares Available for Grant |
Outstanding at the beginning of the period (in shares) | 4,013,611
Options, RSUs and PSUs granted and issuance of shares for services rendered (in shares) | (6,335,986)
Options, RSUs and PSUs cancelled (in shares) | 1,598,684
Fungible ratio change adjustments (in shares) | 282,731
Outstanding at the end of the period (in shares) | 9,059,040
Stock Incentive Plan 2010 |
Shares Available for Grant |
Additional authorization (in shares) | 8,500,000
2024 Inducement Plan |
Shares Available for Grant |
Additional authorization (in shares) | 1,000,000

X
- Definition Number of shares canceled under an established share-based compensation plan. + References No definition available. + Details
Name: | incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesCanceled
Namespace Prefix: | incy_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share Based Compensation Arrangement by Share Based Payment Award, Shares Increase (Decrease) From Fungible Ratio Change Adjustments + References No definition available. + Details
Name: | incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesFungibleRatioChangeAdjustments
Namespace Prefix: | incy_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares granted under an established share-based compensation plan. + References No definition available. + Details
Name: | incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesGranted
Namespace Prefix: | incy_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | incy_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesAvailableForGrantRollForward
Namespace Prefix: | incy_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of additional shares authorized for issuance under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-4 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_PlanNameAxis=incy_StockIncentivePlan2010Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=incy_A2024InducementPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |