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Other Non-Operating Income (Expense), Net (Tables)
 12 Months Ended
Dec. 31, 2016
Other Income and Expenses [Abstract]  
Components of Other Non-Operating Income, Net The components of other non-operating income, net are as follows:
 
Year Ended December 31,
(in millions)
2016
 
2015
 
2014
Interest income
$
2

 
$
2

 
$
2

Income from joint ventures
3

 
3

 
2

Other expense – net
(1
)
 
(5
)
 
(3
)
Total other non-operating income, net
$
4

 
$
—

 
$
1