Name:	incy_DebtInstrumentConversionObligationCommonStockClosingSalesPriceAsPercentageOfConversionPrice
Namespace Prefix:	incy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the number of trading days within a period of 30 consecutive trading days the price of the entity's common stock must exceed the applicable conversion price in order for the debt instruments to be convertible.

No definition available.

Name:	incy_DebtInstrumentConversionObligationCommonStockClosingSalesPriceNumberOfTradingDays
Namespace Prefix:	incy_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the number of consecutive business days immediately after any five consecutive trading day period during the debt instrument measurement period.

No definition available.

Name:	incy_DebtInstrumentConversionObligationNumberOfConsecutiveBusinessDaysAfterConsecutiveTradingDayPeriod
Namespace Prefix:	incy_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the number of consecutive trading days during which the closing price of the entity's common stock must exceed the applicable conversion price for at least 20 days in order for the debt instruments to be convertible.

No definition available.

Name:	incy_DebtInstrumentConversionObligationNumberOfConsecutiveTradingDays
Namespace Prefix:	incy_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the number of consecutive trading days prior to the five consecutive business days during the debt instrument measurement period.

No definition available.

Name:	incy_DebtInstrumentConversionObligationPeriodOfConsecutiveTradingDays
Namespace Prefix:	incy_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the maximum percentage of the trading price of each debt instrument to the product of the last reported sale price of common stock and the conversion rate of the debt instrument that the trading price must be less than in order for the debt instruments to be convertible.

No definition available.

Name:	incy_DebtInstrumentConversionObligationTradingPriceAsPercentageOfProductOfLastReportedCommonStockSalePriceAndConversionRateMaximum
Namespace Prefix:	incy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(5))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

Name:	us-gaap_DebtInstrumentConvertibleConversionRatio1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

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.

No definition available.