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SEGMENT INFORMATION | 9 Months Ended
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Sep. 29, 2024
Segment Reporting [Abstract] |
SEGMENT INFORMATION |
10. SEGMENT INFORMATION
We report segment information based on the management approach, which designates the internal reporting used by the Chief Operating Decision Maker (CODM) for making decisions and assessing performance as the source of our reportable segments. The CODM allocates resources and assesses the performance of each operating segment using information about its revenue and income (loss) from operations. Our CODM does not evaluate our operating segments using discrete asset information. We do not allocate expenses between segments. Core Illumina: Core Illumina’s products and services serve customers in the research, clinical and applied markets, and enable the adoption of a variety of genomic solutions. Core Illumina includes all of our operations, excluding the results of GRAIL. Core Illumina sells products and provides services to GRAIL, and vice versa, in accordance with contractual agreements between the entities. GRAIL: GRAIL is a healthcare company focused on early detection of multiple cancers. We completed the Spin-Off of GRAIL on June 24, 2024. Refer to note 2. GRAIL Spin-Off for additional details.
In millions | Q3 2024 |  | Q3 2023 |  | YTD 2024 |  | YTD 2023
Revenue: |  |  |  |  |  |  |
Core Illumina | $ | 1,080 |  |  | $ | 1,106 |  |  | $ | 3,228 |  |  | $ | 3,341 |
GRAIL | — |  |  | 21 |  |  | 55 |  |  | 62 |
Eliminations | — |  |  | (8) |  |  | (15) |  |  | (21) |
Consolidated revenue | $ | 1,080 |  |  | $ | 1,119 |  |  | $ | 3,268 |  |  | $ | 3,382 |
Income (loss) from operations: |  |  |  |  |  |  |
Core Illumina | $ | 741 |  |  | $ | 262 |  |  | $ | 1,298 |  |  | $ | 519 |
GRAIL | — |  |  | (1,015) |  |  | (2,305) |  |  | (1,424) |
Eliminations | — |  |  | (1) |  |  | (1) |  |  | — |
Consolidated income (loss) from operations | $ | 741 |  |  | $ | (754) |  |  | $ | (1,008) |  |  | $ | (905) |
Total other expense, net primarily relates to Core Illumina, and we do not allocate income taxes to our segments.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards 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