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SUPPLEMENTAL BALANCE SHEET DETAILS (Tables) | 3 Months Ended
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Mar. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Accounts Receivable | Accounts Receivable
In millions | March 30, 2025 |  | December 29, 2024
Trade accounts receivable, gross | $ | 706 |  |  | $ | 744 |
Allowance for credit losses | (7) |  |  | (9) |
Total accounts receivable, net | $ | 699 |  |  | $ | 735 |
Schedule of Inventory | Inventory
In millions | March 30, 2025 |  | December 29, 2024
Raw materials | $ | 216 |  |  | $ | 225 |
Work in process | 404 |  |  | 404 |
Finished goods | 26 |  |  | 31 |
Inventory, gross | 646 |  |  | 660 |
Inventory reserve | (109) |  |  | (113) |
Total inventory, net | $ | 537 |  |  | $ | 547 |
Schedule of Accrued Liabilities | Accrued Liabilities
In millions | March 30, 2025 |  | December 29, 2024
Contract liabilities, current portion | $ | 256 |  |  | $ | 260 |
Accrued compensation expenses (1) | 198 |  |  | 252 |
Accrued taxes payable | 80 |  |  | 101 |
Operating lease liabilities, current portion | 78 |  |  | 79 |
Other, including warranties (2) | 122 |  |  | 135 |
Total accrued liabilities | $ | 734 |  |  | $ | 827 |
_____________ (1)Includes employee separation costs related to restructuring activities. (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 | Q1 2025 |  | Q1 2024 |  |  |  |
Balance at beginning of period | $ | 18 |  |  | $ | 21 |  |  |  |  |
Additions charged to cost of product revenue | 8 |  |  | 12 |  |  |  |  |
Repairs and replacements | (9) |  |  | (13) |  |  |  |  |
Balance at end of period | $ | 17 |  |  | $ | 20 |  |  |  |  |
Schedule Of Restructuring and Related Costs | A summary of the pre-tax restructuring charges is as follows:
In millions | Q1 2025 |  | Q1 2024 |  |  |  |  |  | Cumulative charges recorded since inception
Employee separation costs | $ | 31 |  |  | $ | 4 |  |  |  |  |  |  | $ | 91 |
Asset impairment charges (1) | — |  |  | 32 |  |  |  |  |  |  | 146 |
Other costs | — |  |  | — |  |  |  |  |  |  | 8 |
Total restructuring charges (2) | $ | 31 |  |  | $ | 36 |  |  |  |  |  |  | $ | 245 |
_____________ (1)For Q1 2024, primarily relates to impairment of right-of-use assets and leasehold improvements for our Foster City campus. (2)For Q1 2025, $18 million was recorded in SG&A expense, $11 million in R&D expense, with remainder in cost of revenue. For Q1 2024, $35 million was recorded in SG&A expense and $1 million in R&D expense and primarily related to Core Illumina segment. A summary of restructuring liability activity during Q1 2025 is as follows:
In millions | Employee Separation Costs (1) |  |  |  | Other Costs |  | Total
Amount recorded in accrued liabilities as of December 29, 2024 | $ | 2 |  |  |  |  | $ | 2 |  |  | $ | 4 |
Additional expense recorded | 31 |  |  |  |  | — |  |  | 31 |
Cash payments | (4) |  |  |  |  | (2) |  |  | (6) |
Amount recorded in accrued liabilities as of March 30, 2025 | $ | 29 |  |  |  |  | $ | — |  |  | $ | 29 |
Estimated costs to still be incurred | $ | 15 |  |  |  |  | $ | — |  |  | $ | 15 |
_____________ (1)It is expected that substantially all of the employee separation related charges will be incurred and paid by the end of Q3 2025.

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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-8 + Details
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