XML 69 R47.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Collaboration Agreements - Other Collaborations (Details) $ in Millions | 1 Months Ended
--- | ---
Feb. 28, 2018 USD ($)
Collaborative arrangements with Daiichi Sankyo |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |
Milestone revenue recognized | $ 20.0

X
- 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_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of consideration recognized during the period for the milestone or milestones. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 28 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=68058744&loc=SL6892177-166501 + Details
Name: | us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=exel_CollaborativeArrangementwithDaiichiSankyoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |