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Interest and Other Income, Net
 9 Months Ended
Sep. 30, 2014
Other Income and Expenses [Abstract]  
Interest and Other Income, Net
Interest and Other Income, Net
The components of "Interest and other income, net", were as follows (in millions, unaudited):
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2013
 
2014
 
2013
 
2014
 
 
Interest income
$
196

 
$
187

 
$
558

 
$
524

Interest expense
(19
)
 
(25
)
 
(59
)
 
(76
)
Realized gains (losses) on available-for-sale investments, net
(26
)
 
18

 
135

 
140

Foreign currency exchange losses, net
(159
)
 
(67
)
 
(268
)
 
(269
)
Realized gain on equity interest
0

 
0

 
0

 
126

Realized gain on non-marketable equity investments
0

 
1

 
0

 
139

Other income, net
22

 
19

 
18

 
51

Interest and other income, net
$
14

 
$
133

 
$
384

 
$
635