Description of Operations and Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2021
Description of Operations and Summary of Significant Accounting Policies
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“US GAAP”) for interim financial information. Accordingly, they do not include all of the information and notes required by US GAAP for complete financial statements. In our opinion, the unaudited consolidated financial statements have been prepared on the same basis as audited consolidated financial statements and include all adjustments, consisting of only normal recurring adjustments, necessary for the fair presentation of our financial position, results of operations, comprehensive income and cash flows. The interim results are not necessarily indicative of the results of operations to be expected for the year ending December 31, 2021 or any other period. The accompanying unaudited consolidated financial statements include the accounts of Innoviva, our wholly-owned subsidiaries and certain variable interest entities for which we are the primary beneficiary. All intercompany balances and transactions have been eliminated in consolidation. For consolidated entities where we own or are exposed to less than 100% of the economics, we record net income (loss) attributable to noncontrolling interest in our unaudited consolidated statements of income equal to the percentage of the economic or ownership interest retained in such entities by the respective noncontrolling parties. The accompanying unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2020 filed with the Securities and Exchange Commission (“SEC”) on February 25, 2021 (“2020 Form 10-K”).
Variable Interest Entities	Variable Interest Entities We evaluate our ownership, contractual and other interest in entities to determine if they are variable interest entities (“VIE”), whether we have a variable interest in those entities and the nature and extent of those interests. Based on our evaluation, if we determine we are the primary beneficiary of a VIE, we consolidate the entity in our financial statements.
Equity Investments	Equity Investments We invest from time to time in equity securities of private or public companies. If we determine that we have control over these companies under either voting or VIE models, we include them in our consolidated financial statements. If we determine that we do not have control over these companies under either voting or VIE models, we then determine if we have an ability to exercise significant influence via voting interests, board representation or other business relationships. We may account for the equity investments where we exercise significant influence using either an equity method of accounting or at fair value by electing the fair value option under Accounting Standards Codification ("ASC") Topic 825, Financial Instruments. If the fair value option is applied to an investment that would otherwise be accounted for under the equity method, we apply it to all our financial interests in the same entity (equity and debt, including guarantees) that are eligible items. All gains and losses from fair value changes, unrealized and realized, are presented as changes in fair values of equity and long-term investments, net on the consolidated statements of income. If we conclude that we do not have an ability to exercise significant influence over an investee, we may elect to account for an equity security without a readily determinable fair value using the measurement alternative described in ASC Topic 825. This measurement alternative allows us to measure the equity investment at its cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer.
Accounting Pronouncement Adopted by the Company	Accounting Pronouncement Adopted by the Company In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes”, which is intended to simplify various aspects related to accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2020, with early adoption permitted. We adopted Topic 740 effective January 1, 2021. The adoption did not have a material impact on our consolidated financial statements. In October 2020, the FASB issued ASU 2020-10, Codification Improvements. This ASU improves the codification by ensuring that all guidance that requires or provides an option for an entity to provide information in the notes to financial statements is codified in the disclosure section of the codification. The ASU also clarifies various topics in the codification so that entities can apply guidance more consistently. The ASU is effective for fiscal years beginning after December 15, 2020. We adopted ASU 2020-10 effective January 1, 2021. The adoption did not have a material impact on our consolidated financial statements.
Recently Issued Accounting Standards or Updates Not Yet Adopted	Recently Issued Accounting Standards or Updates Not Yet Adopted In August 2020, the FASB issued ASU 2020-06, Debt-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging-Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity, which is intended to simplify the accounting for convertible instruments by removing certain separation models in Subtopic 470-20 for convertible instruments. The ASU is effective for fiscal years beginning after December 15, 2021, and for interim periods within those fiscal years with early adoption permitted. We are currently in the process of evaluating the effects of the provisions of ASU 2020-06 on our consolidated financial statements.

Description of Operations and Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2021

Description of Operations and Summary of Significant Accounting Policies

The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“US GAAP”) for interim financial information. Accordingly, they do not include all of the information and notes required by US GAAP for complete financial statements. In our opinion, the unaudited consolidated financial statements have been prepared on the same basis as audited consolidated financial statements and include all adjustments, consisting of only normal recurring adjustments, necessary for the fair presentation of our financial position, results of operations, comprehensive income and cash flows. The interim results are not necessarily indicative of the results of operations to be expected for the year ending December 31, 2021 or any other period.

The accompanying unaudited consolidated financial statements include the accounts of Innoviva, our wholly-owned subsidiaries and certain variable interest entities for which we are the primary beneficiary. All intercompany balances and transactions have been eliminated in consolidation. For consolidated entities where we own or are exposed to less than 100% of the economics, we record net income (loss) attributable to noncontrolling interest in our unaudited consolidated statements of income equal to the percentage of the economic or ownership interest retained in such entities by the respective noncontrolling parties. The accompanying unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2020 filed with the Securities and Exchange Commission (“SEC”) on February 25, 2021 (“2020 Form 10-K”).

Variable Interest Entities

We evaluate our ownership, contractual and other interest in entities to determine if they are variable interest entities (“VIE”), whether we have a variable interest in those entities and the nature and extent of those interests. Based on our evaluation, if we determine we are the primary beneficiary of a VIE, we consolidate the entity in our financial statements.

Equity Investments

We invest from time to time in equity securities of private or public companies. If we determine that we have control over these companies under either voting or VIE models, we include them in our consolidated financial statements. If we determine that we do not have control over these companies under either voting or VIE models, we then determine if we have an ability to exercise significant influence via voting interests, board representation or other business relationships.

We may account for the equity investments where we exercise significant influence using either an equity method of accounting or at fair value by electing the fair value option under Accounting Standards Codification ("ASC") Topic 825, Financial Instruments. If the fair value option is applied to an investment that would otherwise be accounted for under the equity method, we apply it to all our financial interests in the same entity (equity and debt, including guarantees) that are eligible items. All gains and losses from fair value changes, unrealized and realized, are presented as changes in fair values of equity and long-term investments, net on the consolidated statements of income.

If we conclude that we do not have an ability to exercise significant influence over an investee, we may elect to account for an equity security without a readily determinable fair value using the measurement alternative described in ASC Topic 825. This measurement alternative allows us to measure the equity investment at its cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer.

Accounting Pronouncement Adopted by the Company

In December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes”, which is intended to simplify various aspects related to accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2020, with early adoption permitted. We adopted Topic 740 effective January 1, 2021. The adoption did not have a material impact on our consolidated financial statements.

In October 2020, the FASB issued ASU 2020-10, Codification Improvements. This ASU improves the codification by ensuring that all guidance that requires or provides an option for an entity to provide information in the notes to financial statements is codified in the disclosure section of the codification. The ASU also clarifies various topics in the codification so that entities can apply guidance more consistently. The ASU is effective for fiscal years beginning after December 15, 2020. We adopted ASU 2020-10 effective January 1, 2021. The adoption did not have a material impact on our consolidated financial statements.

Recently Issued Accounting Standards or Updates Not Yet Adopted

In August 2020, the FASB issued ASU 2020-06, Debt-Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging-Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity, which is intended to simplify the accounting for convertible instruments by removing certain separation models in Subtopic 470-20 for convertible instruments. The ASU is effective for fiscal years beginning after December 15, 2021, and for interim periods within those fiscal years with early adoption permitted. We are currently in the process of evaluating the effects of the provisions of ASU 2020-06 on our consolidated financial statements.