XML 45 R99.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2

Commitments and Contingent Liabilities - Additional Information (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) Notice Filer
Commitments And Contingencies [Line Items]
Potential losses from claims, legal proceedings probable of occurring	$ 0
Number of separate Paragraph IV notices received | Notice	11
Maximum number of days for lawsuit	45 days
Minimum number of months before FDA can approve patent request	30 months
Number of ANDA Filers consolidated to a single case | Filer	8
Non-Capital Commitments
Commitments And Contingencies [Line Items]
Open purchase order commitments	$ 395,300,000
Capital Commitments
Commitments And Contingencies [Line Items]
Open purchase order commitments	$ 33,500,000

X

- Definition

Commitments and contingencies.

+ References

No definition available.

+ Details

Name:	alks_CommitmentsAndContingenciesLineItems
Namespace Prefix:	alks_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum period for lawsuit related to paragraph four certification notice

+ References

No definition available.

+ Details

Name:	alks_MaximumPeriodForLawsuitRelatedToParagraphFourCertificationNotice
Namespace Prefix:	alks_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Minimum period before FDA can approve patent request.

+ References

No definition available.

+ Details

Name:	alks_MinimumPeriodBeforeFdaCanApprovePatentRequest
Namespace Prefix:	alks_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of abbreviated new drug application filers consolidated to single case.

+ References

No definition available.

+ Details

Name:	alks_NumberOfAbbreviatedNewDrugApplicationFilersConsolidatedToSingleCase
Namespace Prefix:	alks_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of separate Paragraph IV Certification Notices that have been received by the Company and/or its partner.

+ References

No definition available.

+ Details

Name:	alks_NumberOfSeparateParagraphFourNotices
Namespace Prefix:	alks_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349

+ Details

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

X

- Definition

Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(17))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(19))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

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(25))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

X

- Details

Name:	us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=alks_NonCapitalPurchaseCommitmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=alks_CapitalPurchaseCommitmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: