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Basis of Presentation and Summary of Significant Accounting Policies (Tables)
3 Months Ended
Apr. 01, 2018
Accounting Policies [Abstract]  
Disaggregation of Revenue from External Customers
The following table represents revenue by source (in millions):
 
Three Months Ended
 
April 1, 2018
 
April 2, 2017
 
Sequencing
 
Microarray
 
Total
 
Sequencing
 
Microarray
 
Total
Consumables
$
417

 
$
87

 
$
504

 
$
318

 
$
69

 
$
387

Instruments
112

 
6

 
118

 
95

 
5

 
100

Other product
5

 
1

 
6

 
4

 

 
4

Total product revenue
534

 
94

 
628

 
417

 
74

 
491

Service and other
96

 
58

 
154

 
78

 
29

 
107

Total revenue
$
630

 
$
152

 
$
782

 
$
495

 
$
103

 
$
598



Revenue related to our Consolidated VIEs is included in sequencing services and other revenue.

The following table represents revenue by geographic area, based on region of destination (in millions):
 
Three Months Ended
 
April 1,
2018
 
April 2,
2017
United States
$
416

 
$
325

Europe
184

 
126

Greater China (1)
78

 
56

Asia-Pacific (1)
70

 
67

Other markets
34

 
24

Total revenue
$
782

 
$
598

____________________________________
(1) Revenue for the Greater China region, which consists of China, Taiwan, and Hong Kong, is reported separately from the Asia-Pacific region.
Summary of Calculation of Weighted Average Shares used to Calculate Basic and Diluted Earnings Per Share, Earnings Per Share
The following is the calculation of weighted average shares used to calculate basic and diluted earnings per share (in millions):
 
Three Months Ended
 
April 1,
2018
 
April 2,
2017
Weighted average shares outstanding
147

 
146

Effect of potentially dilutive common shares from:
 
 
 
Equity awards
1

 
1

Weighted average shares used in calculating diluted earnings per share
148

 
147

Potentially dilutive shares excluded from calculation due to anti-dilutive effect

 
1

Summary of Calculation of Weighted Average Shares used to Calculate Basic and Diluted Earnings Per Share, Antidilutive Securities
The following is the calculation of weighted average shares used to calculate basic and diluted earnings per share (in millions):
 
Three Months Ended
 
April 1,
2018
 
April 2,
2017
Weighted average shares outstanding
147

 
146

Effect of potentially dilutive common shares from:
 
 
 
Equity awards
1

 
1

Weighted average shares used in calculating diluted earnings per share
148

 
147

Potentially dilutive shares excluded from calculation due to anti-dilutive effect

 
1