ACCOUNTS RECEIVABLE AND OTHER (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ACCOUNTS RECEIVABLE AND OTHER
Trade accounts receivable, net of allowance of nil	$ 29	$ 31
Accounts receivable from affiliates	1	1
Other	3	6
Accounts receivable and other	$ 33	$ 38