Shareholders' Equity - Narrative (Details) - USD ($) shares in Millions, $ in Millions |
Mar. 31, 2026 |
Mar. 12, 2026 |
Oct. 25, 2024 |
Jul. 25, 2022 |
|---|---|---|---|---|
| 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 | $ 522.4 |