Represents the additional milestone payments to be made under the license agreement.

No definition available.

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

- Definition

Represents the amount of the milestone payment made under the license agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	incy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the notice period for the termination of license agreement.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
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- Definition

Represents range of tiered, double-digit royalty payments on future global sales if product is successfully commercialized.

+ References

No definition available.

+ Details

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Namespace Prefix:	incy_
Data Type:	dtr-types:percentItemType
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- Definition

Represents the purchase of common stock under Stock Purchase Agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	incy_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the aggregate cost of investments accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Balance Type:	debit
Period Type:	instant

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-SubTopic 10
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Period Type:	instant

- Definition

Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

+ References

+ Details

Name:	us-gaap_LongTermInvestments
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Period Type:	duration

- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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-Topic 730
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
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Period Type:	duration

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

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License Agreements - Agenus (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended		6 Months Ended		12 Months Ended			90 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2017	Jun. 30, 2022
License agreements
Long term investments	$ 149,784		$ 149,784		$ 221,266			$ 149,784
Unrealized gain (loss) on long term investments	(24,897)	$ 26,765	(71,482)	$ (944)
Research and development expense	347,196	343,511	700,569	650,407
Agenus
License agreements
Long term investments	$ 23,400		$ 23,400		$ 38,900			$ 23,400
Shares divested (in shares)					2.0	3.7
Gross proceeds from sale of stock					$ 10,500	$ 17,200
Ownership percentage (as a percent)	5.00%		5.00%					5.00%
Unrealized gain (loss) on long term investments	$ (6,300)	$ 37,800	$ (15,400)	$ 31,900
Royalty-bearing product GITR, OX40 and one undisclosed target \| Agenus \| Maximum
License agreements
Royalty payments on future global net sales (as a percent)			15.00%
Agenus
License agreements
Period of notice for termination of license agreement			12 months
Agenus \| Royalty-bearing product other than GITR, OX40 and one undisclosed target \| Minimum
License agreements
Royalty payments on future global net sales (as a percent)			6.00%
Agenus \| Royalty-bearing product other than GITR, OX40 and one undisclosed target \| Maximum
License agreements
Royalty payments on future global net sales (as a percent)			12.00%
Agenus \| Development, Regulatory and Commercialization Milestones
License agreements
Milestone payment made under license agreement								$ 30,000
Additional milestone payments under the license agreement	$ 500,000		$ 500,000					$ 500,000
Stock purchase agreement \| Agenus
License agreements
Purchase of common stock under Stock Purchase Agreement (in shares )							10.0
Purchase price of common stock							$ 60,000
Per share price							$ 6.00