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Condensed Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 01, 2018
Jul. 02, 2017
Jul. 01, 2018
Jul. 02, 2017
Statement of Comprehensive Income [Abstract]        
Consolidated net income $ 200 $ 120 $ 397 $ 468
Unrealized gain on available-for-sale debt securities, net of deferred tax   1   1
Total consolidated comprehensive income 200 121 397 469
Add: Comprehensive loss attributable to noncontrolling interests 9 8 20 27
Comprehensive income attributable to Illumina stockholders $ 209 $ 129 $ 417 $ 496