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Other Income, Net (Tables)
 9 Months Ended
Sep. 30, 2018
Other Income and Expenses [Abstract]  
Interest and Other Income
Other income (expense), net included:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2018
 
2017
 
2018
 
2017
 
 
 
 
 
 
 
 
 
(in millions)
Interest income
$
5

 
$
2

 
$
17

 
$
4

Components of net periodic benefit cost other than service cost (Note 9)
(5
)
 
(7
)
 
(15
)
 
(16
)
Reserve for Unsecured Creditors litigation
—

 
—

 
—

 
(10
)
Costs associated with acquisitions
—

 
—

 
(5
)
 
—

Other, net
4

 
(2
)
 
30

 
—

Other income (expense), net
$
4

 
$
(7
)
 
$
27

 
$
(22
)