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Stock-Based Compensation - Summary of weighted-average assumptions used to calculate estimated value of stock options (Details) - Stock options - Innoviva [Member] - $ / shares | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Valuation Assumptions |  |  |  |  |  |  |
Risk-free interest rate | [1] |  | 0.00% |  |  |  |
Volatility | [1] |  | 0.00% |  |  |  |
Weighted-average estimated fair value of stock options granted |  |  | $ 0 | [1] | $ 0 |  |
Weighted-average |  |  |  |  |  |  |
Valuation Assumptions |  |  |  |  |  |  |
Dividend yield |  | 0.00% | 0.00% | [1] |  | 0.00% | 0.00%
Minimum |  |  |  |  |  |  |
Valuation Assumptions |  |  |  |  |  |  |
Risk-free interest rate |  | 4.13% |  |  |  | 3.50% | 1.60%
Expected term (in years) |  | 6 years 3 days |  |  |  | 5 years 1 month 28 days | 5 years 6 months
Volatility |  | 37.30% |  |  |  | 37.30% | 38.80%
Weighted-average estimated fair value of stock options granted |  | $ 5.66 |  |  |  | $ 5.22 | $ 6.98
Maximum |  |  |  |  |  |  |
Valuation Assumptions |  |  |  |  |  |  |
Risk-free interest rate |  | 4.21% |  |  |  | 4.21% | 3.03%
Expected term (in years) |  | 6 years 2 months 19 days |  |  |  | 6 years 2 months 19 days | 6 years 1 month 9 days
Volatility |  | 37.80% |  |  |  | 38.50% | 40.50%
Weighted-average estimated fair value of stock options granted |  | $ 5.97 |  |  |  | $ 5.97 | $ 7.73
[1] | There were no options granted for the three months ended September 30, 2022.

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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Rate of weighted-average expected volatility for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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