CONTINGENCIES AND GUARANTEES (Details) In Millions, unless otherwise specified	1 Months Ended		6 Months Ended
	Mar. 31, 2008 USD ($)	Mar. 31, 2008 BRL	Dec. 31, 2012 USD ($)	Jun. 30, 2012 USD ($)
CONTINGENCIES AND GUARANTEES [Abstract]
Liability for future remediation costs			$ 14	$ 14
Percentage of liability for aggregate remediation and associated costs, other than legal fees			24.30%
Remediation period			30 years
Amount awarded to Petroplus	13	23
Current value of judgment			35
Estimated range of loss, minimum			0
Estimated range of loss, maximum			29
Letters of credit outstanding			$ 14