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Stockholders’ Equity - Estimate Grant-Date Fair Value (Details) - TSR-Based Restricted Stock Units	9 Months Ended
	Sep. 29, 2023 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value, awarded (in dollars per share)	$ 26.05
Fair value of Exelixis common stock on grant date (in dollars per share)	$ 19.48
Expected volatility	40.26%
Risk-free interest rate	3.75%
Dividend yield	0.00%

X

- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Rate of weighted-average expected volatility for award under share-based payment arrangement.

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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.

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Price of a single share of a number of saleable stocks of a company.

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