XML 73 R37.htm IDEA: XBRL DOCUMENT
v3.22.4

Organization and Significant Accounting Policies, Cash, Cash Equivalents and Investments (Details) | Dec. 31, 2022 Company
--- | ---
Cash, Cash Equivalents and Investments [Abstract] |
Number of publicly held companies in which there is an equity ownership interest of less than 20% | 3
Number of privately held companies in which there is an equity ownership interest of less than 20% | 8

X
- Definition Number of privately-held companies, in which the entity has an equity ownership interest of less than 20%, with which it conducts business. These are accounted for under the cost method. + References No definition available. + Details
Name: | ions_NumberOfPrivatelyHeldCompaniesInWhichEntityHasEquityInvestment
Namespace Prefix: | ions_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of publicly-held companies, in which the entity has an equity ownership interest of less than 20%, with which it conducts business. These are accounted for at fair value. + References No definition available. + Details
Name: | ions_NumberOfPubliclyHeldCompaniesInWhichEntityHasEquityInvestment
Namespace Prefix: | ions_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_CashCashEquivalentsAndShortTermInvestmentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration