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NET INCOME PER SHARE
 12 Months Ended
Dec. 31, 2017
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,
 
2017
 
2016
 
2015
NUMERATOR:
 
 
 
 
 
Net income
$
3,488

 
$
2,244

 
$
2,181

Incremental income effect of
  interest on 5.25% convertible notes
—

 
2

 
4

Net income after assumed conversion
$
3,488

 
$
2,246

 
$
2,185

 
 
 
 
 
 
DENOMINATOR:
 

 
 

 
 
Weighted-average shares outstanding, basic
601

 
627

 
661

Dilutive effect of Employee stock options and
  restricted stock units
2

 
1

 
2

Dilutive effect of 5.25% convertible notes
—

 
5

 
6

Adjusted weighted-average shares outstanding, diluted
603

 
633

 
669

 
 
 
 
 
 
NET INCOME PER SHARE:
 

 
 

 
 
Basic
$
5.80

 
$
3.58

 
$
3.30

Diluted
$
5.79

 
$
3.55

 
$
3.27