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Other Income (Expense) (Tables)
 9 Months Ended
Sep. 30, 2013
Other (Expense) Income [Abstract]  
Other Income (Expense)
Other income (expense) consists of the following (in millions):
 
Three months ended
September 30,
 
Nine months ended
September 30,
 
2013
 
2012
 
2013
 
2012
Equity earnings
$
6

 
$
—

 
$
12

 
$
8

Gains on investments
37

 
9

 
36

 
11

Foreign currency remeasurement (losses) gains
(4
)
 
(24
)
 
15

 
(24
)
Derivative gains (losses)
1

 
8

 
(8
)
 
8

Other
(1
)
 
(2
)
 
(1
)
 
—

 
$
39

 
$
(9
)
 
$
54

 
$
3