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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Client Receivables, Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands | Mar. 29, 2025 | Dec. 28, 2024 | Dec. 30, 2023
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Revenue from Contract with Customer [Abstract] |  |  |
Client receivables | $ 556,937 | $ 527,705 |
Unbilled revenue | 215,950 | 211,511 | $ 228,000
Total | 772,887 | 739,216 |
Less: Allowance for credit losses | (16,258) | (18,301) |
Trade receivables and contract assets, net | 756,629 | 720,915 |
Current deferred revenue | 250,462 | 248,322 |
Long-term deferred revenue (included in Other long-term liabilities) | 33,945 | 34,291 |
Customer contract deposits (included in Other current liabilities) | $ 99,654 | $ 89,446 |

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