XML 49 R38.htm IDEA: XBRL DOCUMENT
v3.21.2

Collaboration Agreements, In-Licensing Arrangements And Business Development Activities - GSK (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 01, 2021 | Oct. 02, 2020 | Oct. 01, 2021 | Oct. 02, 2020
Collaboration Agreement with GlaxoSmithKline |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |
Royalty expense | $ 11.5 | $ 7.9 | $ 33.7 | $ 23.7
GSK |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |
Percent of royalty on net sale |  |  | 3.00% |

X
- Definition Collaboration Agreement, Percent Of Royalty On Net Sale + References No definition available. + Details
Name: | exel_CollaborationAgreementPercentOfRoyaltyOnNetSale
Namespace Prefix: | exel_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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 Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
Name: | us-gaap_RoyaltyExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Details
Name: | srt_MajorCustomersAxis=exel_GlaxoSmithKlineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |