ACCOUNTS RECEIVABLE

12 Months Ended

Dec. 31, 2018

Receivables [Abstract]

ACCOUNTS RECEIVABLE

ACCOUNTS RECEIVABLE

The following table presents the components of Accounts Receivable, Net on the Consolidated Balance Sheets:

	December 31,
(in millions)	2018			2017
Customer (1) (2)	$	99		$	81
Customer, Unbilled	45			39
Due from Affiliates (Note 6)	8			7
Other	25			16
Allowance for Doubtful Accounts	(5		)	(5		)
Accounts Receivable, Net	$	172		$	138

⁽¹⁾  Includes $8 million and $9 million as of December 31, 2018 and 2017, respectively, of receivables related to revenue from derivative instruments.

⁽²⁾  In 2018, Customer Accounts Receivable increased due to higher wholesale sales as a result of the increase in available system capacity related to Gila River Unit 2.