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Interest Expense, net
12 Months Ended
Dec. 31, 2018
Interest Income (Expense), Net [Abstract]  
Interest Expense, net
Interest Expense, net
Components of net interest expense were as follows:
 
Year Ended December 31,
 
2018
 
2017
 
2016
 
(in millions)
Interest expense
$
141

 
$
195

 
$
153

Amortization of deferred financing fees
6

 
15

 
11

Interest income
(3
)
 
(1
)
 
(3
)
Interest expense, net
$
144

 
$
209

 
$
161