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Shareholders' Equity - Narrative (Details) - USD ($) shares in Millions, $ in Millions | Jun. 30, 2026 | Mar. 12, 2026 | Oct. 25, 2024 | Jul. 25, 2022
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F5, Inc. 2026 Incentive Award Plan [Member] |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized |  | 5.4 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Rolled Over From Prior Plan |  | 1.9 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant | 5.4 |  |  |
October Twenty Six Two Thousand Ten Program |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Share Repurchase Program, Authorized, Amount |  |  | $ 1,000.0 | $ 6,400.0
Share Repurchase Program, Remaining Authorized, Amount | $ 422.4 |  |  |

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- Definition Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Rolled Over From Prior Plan + References No definition available. + Details
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- Definition Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
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- 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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
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- Definition Number of shares authorized for issuance under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Amount remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
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