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ACCOUNTS RECEIVABLE
 12 Months Ended
Dec. 31, 2017
Accounts Receivable, Net [Abstract]  
Accounts Receivable
ACCOUNTS RECEIVABLE
The following table presents the components of Accounts Receivable, Net on the Consolidated Balance Sheets:
 
December 31,
(in millions)
2017
 
2016
Customer
$
81

 
$
74

Due from Affiliates (Note 5)
7

 
9

Unbilled
39

 
34

Other
16

 
13

Allowance for Doubtful Accounts
(5
)
 
(5
)
Accounts Receivable, Net
$
138

 
$
125