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Other Non-Operating Income, Net
 12 Months Ended
Dec. 31, 2013
Other Non-Operating Income, Net [Abstract]  
Other Non-Operating Income, Net
Other Non-Operating (Expense) Income, Net
The components of other non-operating (expense) income, net are as follows:
 
Year Ended December 31,
(in millions)
2013
 
2012
 
2011
Interest income
$
3

 
$
4

 
$
3

Income from joint ventures
2

 
4

 
4

Other expense – net (a)
(15
)
 
(8
)
 
(2
)
Total other non-operating (expense) income, net
$
(10
)
 
$
—

 
$
5

(a)
2013 includes $10 million of expense incurred under the tax matters agreement with ITT. Refer to Note 7 "Income Taxes" for additional information regarding the tax matters agreement.