OTHER INFORMATION (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Interest paid	$ 195	$ 180
Other current assets
Derivative assets from commodities contracts	56		$ 39
Amount due from joint interest partners	54		51
Assets held for sale			19
Accrued liabilities
Net greenhouse gas obligations	99		89
Accrued employee-related costs	48		91
Accrued interest	23		25
Derivative liabilities from commodities contracts	19		103
Other long-term liabilities
Non-current asset retirement obligation	$ 406		$ 397