Statement of Consolidated Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash Flows From Operating Activities
Net income (loss)	$ (65)	$ (296)
Adjustments to reconcile to net cash provided by (used in) operating activities
(Gains) losses on asset sales, net	(7)	0
Depreciation, depletion and amortization	417	737
Exploration lease and other impairment	10	7
Stock compensation expense	13	22
Non-cash (gains) losses on commodity derivatives, net	38	0
Provision (benefit) for deferred income taxes and other tax accruals	(36)	(27)
Loss on debt extinguishment	27	0
Changes in operating assets and liabilities
(Increase) decrease in accounts receivable	(11)	115
(Increase) decrease in inventories	(7)	(55)
Increase (decrease) in accounts payable and accrued liabilities	(135)	(115)
Increase (decrease) in taxes payable	(1)	6
Changes in other operating assets and liabilities	(33)	(45)
Net cash provided by (used in) operating activities	210	349
Cash Flows From Investing Activities
Additions to property, plant and equipment - E&P	(363)	(340)
Additions to property, plant and equipment - Midstream	(37)	(50)
Payments for Midstream equity investments	(24)	0
Proceeds from asset sales	6	100
Other, net	(4)	0
Net cash provided by (used in) investing activities	(422)	(290)
Cash Flows From Financing Activities
Net borrowings (repayments) of debt with maturities of 90 days or less	0	5
Debt with maturities of greater than 90 days – Borrowings	0	0
Debt with maturities of greater than 90 days – Repayments	(434)	(26)
Common stock acquired and retired	(371)	0
Cash dividends paid	(89)	(92)
Noncontrolling interests, net	(12)	0
Other, net	(3)	8
Net cash provided by (used in) financing activities	(909)	(105)
Net Increase (Decrease) in Cash and Cash Equivalents	(1,121)	(46)
Cash and Cash Equivalents at Beginning of Year	4,847	2,732
Cash and Cash Equivalents at End of Period	$ 3,726	$ 2,686