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Interest Expense, net
 3 Months Ended
Mar. 31, 2018
Interest Income (Expense), Net [Abstract]  
Interest Expense, net
Interest Expense, net
Components of net interest expense were as follows:
 
 
For the Three Months Ended March 31,
 
 
2018
 
2017
 
 
(in millions)
Interest expense
 
$
34

 
$
55

Amortization of deferred financing fees
 
2

 
4

Interest income
 
(2
)
 
(1
)
Interest expense, net
 
$
34

 
$
58