FAIR VALUE MEASUREMENTS (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair value of assets and liabilities measured on recurring basis
Marketable securities-current	$ 1	$ 1
Investments in Reserve Yield Plus Fund	2	2
Marketable debt securities-noncurrent	62	62
Investments	65	65
Estimated fair value of the long-term debt instrument as a percentage of carrying value	105.40%	103.50%
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair value of assets and liabilities measured on recurring basis
Marketable securities-current	1	1
Investments in Reserve Yield Plus Fund	0	0
Marketable debt securities-noncurrent	24	23
Investments	25	24
Recurring basis | Significant Other Observable Inputs (Level 2)
Fair value of assets and liabilities measured on recurring basis
Marketable securities-current	0	0
Investments in Reserve Yield Plus Fund	2	2
Marketable debt securities-noncurrent	37	38
Investments	39	40
Recurring basis | Significant Unobservable Inputs (Level 3)
Fair value of assets and liabilities measured on recurring basis
Marketable securities-current	0	0
Investments in Reserve Yield Plus Fund	0	0
Marketable debt securities-noncurrent	1	1
Investments	$ 1	$ 1