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Other Income (Tables)
 3 Months Ended
Mar. 31, 2013
Other (Expense) Income [Abstract]  
Other (Expense) Income
Other income consists of the following (in millions):
 
 
Three months ended
March 31,
 
2013
 
2012
Equity earnings
$
2

 
$
5

Realized gain on sale of investments
1

 
10

Foreign currency remeasurement gains (losses)
24

 
(18
)
Derivative (losses) gains
(18
)
 
2

Other
—

 
1

 
$
9

 
$
—