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SUPPLEMENTAL BALANCE SHEET DETAILS (Tables) | 12 Months Ended
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Dec. 29, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Accounts Receivable | Accounts Receivable
In millions | December 29, 2024 |  | December 31, 2023
Trade accounts receivable, gross | $ | 744 |  |  | $ | 741 |
Allowance for credit losses | (9) |  |  | (7) |
Total accounts receivable, net | $ | 735 |  |  | $ | 734 |
Schedule of Inventory | Inventory
In millions | December 29, 2024 |  | December 31, 2023
Raw materials | $ | 225 |  |  | $ | 276 |
Work in process | 404 |  |  | 402 |
Finished goods | 31 |  |  | 30 |
Inventory, gross | 660 |  |  | 708 |
Inventory reserve | (113) |  |  | (121) |
Total inventory, net | $ | 547 |  |  | $ | 587 |
Schedule of Property and Equipment | The estimated useful lives of the major classes of property and equipment are generally as follows:
Buildings and leasehold improvements | 4 to 20 years
Machinery and equipment | 3 to 5 years
Computer hardware and software | 3 to 9 years
Furniture and fixtures | 7 years
Property and Equipment
In millions | December 29, 2024 |  | December 31, 2023
Leasehold improvements | $ | 772 |  |  | $ | 803 |
Machinery and equipment | 683 |  |  | 684 |
Computer hardware and software | 478 |  |  | 463 |
Furniture and fixtures | 53 |  |  | 55 |
Buildings | 44 |  |  | 44 |
Construction in progress | 39 |  |  | 96 |
Total property and equipment, gross | 2,069 |  |  | 2,145 |
Accumulated depreciation | (1,254) |  |  | (1,138) |
Total property and equipment, net | $ | 815 |  |  | $ | 1,007 |
Schedule of Accrued Liabilities | Accrued Liabilities
In millions | December 29, 2024 |  | December 31, 2023
Legal contingencies(1) | $ | 26 |  |  | $ | 484 |
Contract liabilities, current portion | 260 |  |  | 252 |
Accrued compensation expenses | 252 |  |  | 223 |
Accrued taxes payable | 101 |  |  | 79 |
Operating lease liabilities, current portion | 79 |  |  | 86 |
Liability-classified equity incentive awards | — |  |  | 55 |
Other, including warranties(2) | 109 |  |  | 146 |
Total accrued liabilities | $ | 827 |  |  | $ | 1,325 |
_____________ (1)See note 9. Legal Proceedings for additional details. (2)See table below for changes in the reserve for product warranties.
Schedule of Changes in Reserve for Product Warranties | Changes in the reserve for product warranties were as follows:
In millions |
Balance as of January 2, 2022 | $ | 22 |
Additions charged to cost of product revenue | 23 |
Repairs and replacements | (27) |
Balance as of January 1, 2023 | 18 |
Additions charged to cost of product revenue | 42 |
Repairs and replacements | (39) |
Balance as of December 31, 2023 | 21 |
Additions charged to cost of product revenue | 42 |
Repairs and replacements | (45) |
Balance as of December 29, 2024 | $ | 18 |
Schedule of Restructuring and Related Costs | A summary of the pre-tax restructuring charges is as follows:
In millions | 2024 |  | 2023 |  | Cumulative charges recorded since inception
Employee separation costs | $ | 12 |  |  | $ | 48 |  |  | $ | 60 |
Asset impairment charges(1) | 46 |  |  | 100 |  |  | 146 |
Other costs | 4 |  |  | 4 |  |  | 8 |
Total restructuring charges(2) | $ | 62 |  |  | $ | 152 |  |  | $ | 214 |
_____________ (1)For 2024, relates to impairment of right-of-use assets and leasehold improvements for Foster City campus and other property in San Diego. For 2023, primarily relates to impairment of right-of-use assets and leasehold improvements for our i3 and Foster City campuses. (2)For 2024, $59 million was recorded in SG&A expense, $2 million in R&D expense, and remainder in cost of revenue. For 2023, $122 million was recorded in SG&A expense, $24 million in R&D expense, and remainder in cost of revenue. Total restructuring charges primarily relate to our Core Illumina segment. A summary of the restructuring liability is as follows:
In millions | Employee Separation Costs |  | Other Costs |  | Total
Amount recorded in accrued liabilities as of January 1, 2023 | $ | — |  |  | $ | — |  |  | $ | — |
Expense recorded | 48 |  |  | 4 |  |  | 52 |
Cash payments | (31) |  |  | (3) |  |  | (34) |
Amount recorded in accrued liabilities as of December 31, 2023 | 17 |  |  | 1 |  |  | 18 |
Expense recorded | 12 |  |  | 4 |  |  | 16 |
Cash payments | (24) |  |  | (2) |  |  | (26) |
Adjustments to accrual | (3) |  |  | (1) |  |  | (4) |
Amount recorded in accrued liabilities as of December 29, 2024 | $ | 2 |  |  | $ | 2 |  |  | $ | 4 |

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