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v3.20.2

Summary of significant accounting policies (Details) | 6 Months Ended
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Jun. 30, 2020 issuer instrument item
Concentrations of Credit Risk |
Number of issuer to which company limits the amount of credit exposure other than US Government guaranteed securities | issuer | 1
Number of financial investment to which company limits the amount of credit exposure other than US Government guaranteed securities | instrument | 1
Variable Interest Entities |
Number of entities in which variable interest held | item | 0
JAKAFI |
Inventory |
Shelf life for finished goods inventory, maximum | 36 months
ICLUSIG |
Inventory |
Shelf life for finished goods inventory, maximum | 36 months
PEMAZYRE |
Inventory |
Period of lower average per unit cost of materials | 48 months
Shelf life for finished goods inventory, maximum | 36 months

X
- References No definition available. + Details
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Namespace Prefix: | incy_
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Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of financial investment to which entity limits the amount of credit exposure other than US Government guaranteed securities. + References No definition available. + Details
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Namespace Prefix: | incy_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of issuer to which entity limits the amount of credit exposure other than US Government guaranteed securities. + References No definition available. + Details
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Namespace Prefix: | incy_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the maximum useful life of merchandise or goods held by the entity that are readily available for sale. + References No definition available. + Details
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Namespace Prefix: | incy_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the length of time in which cost of goods sold will deviate from average due to unusual and/or infrequent conditions. + References No definition available. + Details
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Namespace Prefix: | incy_
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- Definition n/a + References No definition available. + Details
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Period Type: | duration

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- Definition Represents the number of Variable Interest Entities as on date. + References No definition available. + Details
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Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=incy_ICLUSIGMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=incy_PemazyreMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |