FINANCIAL CHARGES AND OTHER (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
FINANCIAL CHARGES AND OTHER
Interest expense	$ 48	$ 42		$ 40
Amortization of debt issue costs (Note 11)	1	1	[1]	1	[1]
Net realized loss related to the interest rate swaps and options	2	1
Other	(1)			(1)
Financial charges and other	$ (50)	$ (44)	[1]	$ (40)	[1]

[1] Recast as discussed in Note 2 and Note 6.