Consolidated Condensed Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOW FROM OPERATING ACTIVITIES
Net income / (loss)	$ (272)	$ 657
Adjustments to reconcile net income / (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	757	886
Deferred income tax expense / (benefit)	(165)	262
Other noncash charges to income	126	22
Dry hole expenses	9	52
Changes in operating assets and liabilities, net	(43)	(12)
Net cash provided by operating activities	412	1,867
CASH FLOW FROM INVESTING ACTIVITIES
Capital investments	(323)	(1,569)
Changes in capital investment accruals	(202)	24
Acquisitions and other	(17)	(69)
Net cash used by investing activities	(542)	(1,614)
CASH FLOW FROM FINANCING ACTIVITIES
Proceeds from revolving credit facility	1,345
Repayments of revolving credit facility	(1,224)
Proceeds from issuance of common stock	7
Cash dividends paid	(8)
Distributions to Occidental, net		(148)
Net cash provided / (used) by financing activities	120	(148)
Increase / (decrease) in cash and cash equivalents	(10)	105
Cash and cash equivalents - beginning of period	14
Cash and cash equivalents - end of period	$ 4	$ 105