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ACCOUNTS RECEIVABLE (Tables)
 12 Months Ended
Dec. 31, 2016
Accounts Receivable, Net [Abstract]  
Accounts Receivable
The following table presents the components of Accounts Receivable, Net on the Consolidated Balance Sheets:
 
December 31,
(in millions)
2016
 
2015
Customer
$
74

 
$
79

Due from Affiliates (Note 5)
9

 
7

Unbilled
34

 
39

Other (1)
13

 
39

Allowance for Doubtful Accounts (1)
(5
)
 
(27
)
Accounts Receivable, Net
$
125

 
$
137

(1) 
In 2016, Accounts Receivable—Other and Allowance for Doubtful Accounts decreased due to the settlement and release of asserted claims between TEP and the Third-Party Owners related to Springerville Unit 1. See Note 7 for additional information regarding the settlement of the Third-Party Owners' claims.