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NET INCOME PER SHARE
 12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
NET INCOME PER SHARE
NET INCOME PER SHARE

The following table sets forth the computation of basic and diluted net income per share (in millions except per share amounts):

 
Year ended December 31,
 
2015
 
2014
 
2013
NUMERATOR:
 
 
 
 
 
Net income
$
2,181

 
$
1,136

 
$
754

Incremental income effect of
  interest on 5.25% convertible notes
4

 
4

 
3

Net income after assumed conversion
$
2,185

 
$
1,140

 
$
757

 
 
 
 
 
 
DENOMINATOR:
 

 
 

 
 
Weighted-average shares outstanding, basic
661

 
687

 
710

Dilutive effect of Employee stock options and
  restricted stock units
2

 
3

 
2

Dilutive effect of 5.25% convertible notes
6

 
6

 
6

Adjusted weighted-average shares outstanding, diluted
669

 
696

 
718

 
 
 
 
 
 
NET INCOME PER SHARE:
 

 
 

 
 
Basic
$
3.30

 
$
1.65

 
$
1.06

Diluted
$
3.27

 
$
1.64

 
$
1.05

 
 
 
 
 
 
Potentially dilutive amounts excluded from calculations:
 

 
 

 
 
Stock options and restricted stock units
—

 
—

 
9