OTHER INFORMATION (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
OTHER INFORMATION
Amount due from joint interest partners, other current assets	$ 110		$ 120
Deferred tax assets, other current assets	55		60
Greenhouse gas emission assets, other current assets	40		65
Accrued compensation-related costs, accrued liabilities	130		95
Interest payable, accrued liabilities	65		70
Greenhouse gas liabilities, accrued liabilities	75		65
Voluntary retirement and employee reduction charges, accrued liabilities	40
Asset Retirement Obligations, other long-term liabilities	397		$ 397
Interest Paid	$ 248	$ 0