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Earnings Per Share and Certain Related Information - Narrative (Details) - USD ($) |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Apr. 30, 2026 | Mar. 27, 2026 | Dec. 26, 2025 | Sep. 26, 2025 | Jun. 27, 2025 | Mar. 28, 2025 | Dec. 27, 2024 | Jan. 02, 2026 | Jan. 30, 2025 | Jan. 25, 2023
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, issued (in shares) |  | 118,190,953 |  | 119,081,294 |  |  |  |  |  |
Dividend declared (in dollars per share) |  | $ 0.36 | $ 0.32 | $ 0.32 | $ 0.32 | $ 0.32 | $ 0.29 |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Dividend declared (in dollars per share) | $ 0.36 |  |  |  |  |  |  |  |  |
2023 Stock Repurchase Program |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Amount authorized to be repurchased |  |  |  |  |  |  |  |  |  | $ 1,000,000,000.0
2025 Stock Repurchase Program |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Amount authorized to be repurchased |  | $ 1,500,000,000 |  |  |  |  |  |  | $ 1,500,000,000 |
Remaining authorized repurchase amount |  | $ 746,400,000 |  |  |  |  |  |  |  |
PA Consulting Group Limited |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, issued (in shares) |  | 2,043,537 |  |  |  |  |  | 2,043,537 |  |

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