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PA Consulting Redeemable Noncontrolling Interests - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Dec. 29, 2023 | Dec. 30, 2022 | Sep. 29, 2023 | Mar. 02, 2021
Business Acquisition [Line Items] |  |  |  |
Repurchase of redeemable noncontrolling interests | $ 24,360 | $ 58,353 |  |
Preferred redeemable noncontrolling interests redemption value adjustment | $ 1,766 | 0 |  |
Preference share effect on basic earnings per share (in dollars per share) | $ 0.01 |  |  |
PA Consulting Employees |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Ownership interest of employees | 70.00% |  | 69.00% |
PA Consulting Group Limited |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Percentage of outstanding shares of common and preferred stock acquired |  |  |  | 65.00%
Allocated share-based compensation expense | $ 1,600 | $ 4,300 |  |
Cash in employee benefit trust | $ 1,000 |  | $ 2,800 |

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