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Quarterly Financial Information (unaudited) (Tables)
12 Months Ended
Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]  
Summary of Quarterly Data
Summarized quarterly data for fiscal years 2017 and 2016 are as follows (in millions, except per share amounts):
 
First Quarter
 
Second Quarter
 
Third Quarter
 
Fourth Quarter
2017
 

 
 

 
 

 
 

Total revenue
$
598

 
$
662

 
$
714

 
$
778

Gross profit
$
368

 
$
434

 
$
482

 
$
542

Consolidated net income
$
348

 
$
120

 
$
152

 
$
58

Net income attributable to Illumina stockholders (a)
$
367

 
$
128

 
$
163

 
$
68

Earnings per share attributable to Illumina stockholders:
 
 
 
 
 
 
 
Basic
$
2.50

 
$
0.87

 
$
1.12

 
$
0.47

Diluted
$
2.48

 
$
0.87

 
$
1.11

 
$
0.46

2016
 
 
 
 
 
 
 
Total revenue
$
572

 
$
600

 
$
607

 
$
619

Gross profit
$
397

 
$
424

 
$
426

 
$
419

Consolidated net income
$
88

 
$
116

 
$
117

 
$
108

Net income attributable to Illumina stockholders
$
90

 
$
120

 
$
129

 
$
124

Earnings per share attributable to Illumina stockholders:
 
 
 
 
 
 
 
Basic
$
0.61

 
$
0.83

 
$
0.88

 
$
0.84

Diluted
$
0.60

 
$
0.82

 
$
0.87

 
$
0.84