Statement of Consolidated Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash Flows From Operating Activities
Net income (loss)	$ (296)	$ (488)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities
Depreciation, depletion and amortization	737	868
Exploratory dry hole costs	0	85
Exploration lease impairment	7	9
Stock compensation expense	22	25
Provision (benefit) for deferred income taxes and other tax accruals	(27)	(351)
Changes in operating assets and liabilities
(Increase) decrease in accounts receivable	115	317
(Increase) decrease in inventories	(55)	(13)
Increase (decrease) in accounts payable and accrued liabilities	(115)	(360)
Increase (decrease) in taxes payable	6	(15)
Changes in other operating assets and liabilities	(45)	(137)
Net cash provided by (used in) operating activities	349	(60)
Cash Flows From Investing Activities
Additions to property, plant and equipment - E&P	(340)	(567)
Additions to property, plant and equipment - Midstream	(50)	(53)
Proceeds from asset sales	100	0
Other, net	0	7
Net cash provided by (used in) investing activities	(290)	(613)
Cash Flows From Financing Activities
Net borrowings (repayments) of debt with maturities of 90 days or less	5	5
Debt with maturities of greater than 90 days – Borrowings	0	0
Debt with maturities of greater than 90 days – Repayments	(26)	(17)
Proceeds from issuance of preferred stock	0	557
Proceeds from issuance of common stock	0	1,087
Cash dividends paid	(92)	(80)
Other, net	8	(38)
Net cash provided by (used in) financing activities	(105)	1,514
Net Increase (Decrease) in Cash and Cash Equivalents	(46)	841
Cash and Cash Equivalents at Beginning of Year	2,732	2,716
Cash and Cash Equivalents at End of Period	$ 2,686	$ 3,557