ACCOUNTS RECEIVABLE AND OTHER (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
ACCOUNTS RECEIVABLE AND OTHER
Trade accounts receivable, net of allowance of nil	$ 31	$ 34
Imbalance receivable from affiliates	1	2
Other	2	1
Accounts receivable and other	34	37
Trade accounts receivable, allowance	$ 0	$ 0