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SEGMENT INFORMATION (Tables)
9 Months Ended
Sep. 29, 2024
Segment Reporting [Abstract]  
Schedule of Operating Performance and Assets by Segment We completed the Spin-Off of GRAIL on June 24, 2024. Refer to note 2. GRAIL Spin-Off for additional details.
In millionsQ3 2024Q3 2023YTD 2024YTD 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)